AD 2015-07-02

We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) airplanes. This AD was prompted by a determination that the forward lugs of the flap hinge box might not conform to engineering drawings, which could result in premature fatigue cracking. This AD requires revising the maintenance or inspection program to include new airworthiness limitations tasks; and measuring the forward lug edge distance of each flap hinge box, inspecting for cracking and damage (i.e., deformation or bearing failure) of the forward lug edge of each flap hinge box, and repairing any cracking or damage if necessary. We are issuing this AD to detect and correct non-conforming flap hinge box forward lugs, which could result in failure of the lugs and detachment of the flap hinge box and consequent detachment of the flap surface.

Final rule.

Adoption of the Amendment

Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0 1. The authority citation for part 39 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec. 39.13 [Amended]

0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD):

2015-07-02 Bombardier, Inc.: Amendment 39-18130. Docket No. FAA- 2014-0491; Directorate Identifier 2014-NM-023-AD.

(a) Effective Date

This AD becomes effective June 4, 2015.

(b) Affected ADs

None.

(c) Applicability

This AD applies to the airplanes identified in paragraphs (c)(1) through (c)(4) of this AD, certificated in any category.
(1) Bombardier, Inc. Model CL-600-1A11 (CL-600) airplanes, serial numbers 1004 through 1085 inclusive.
(2) Bombardier, Inc. Model CL-600-2A12 (CL-601) airplanes, serial numbers 3001 through 3066 inclusive.
(3) Bombardier, Inc. Model CL-600-2B16 (CL-601-3A and CL-601-3R Variants) airplanes, serial numbers 5001 through 5194 inclusive.
(4) Bombardier, Inc. Model CL-600-2B16 (CL-604 Variants) airplanes, serial numbers 5301 through 5665 inclusive, and 5701 through 5953 inclusive.

(d) Subject

Air Transport Association (ATA) of America Code 57, Wings.

(e) Reason

This AD was prompted by a determination that the forward lugs of the flap hinge box might not conform to engineering drawings, which could result in premature fatigue cracking. We are issuing this AD to detect and correct non-conforming flap hinge box forward lugs, which could result in failure of the lugs and detachment of the flap hinge box and consequent detachment of the flap surface.

[[Page 24203]]

(f) Compliance

Comply with this AD within the compliance times specified, unless already done.

(g) Maintenance or Inspection Program Revision

Within 60 days afterthe effective date of this AD, revise the maintenance or inspection program, as applicable, by incorporating the applicable airworthiness limitation (AWL) tasks as specified in table 1 to this paragraph. The initial compliance time for doing the task is at the applicable times specified in table 1 to this paragraph. For the incorporation of tasks specified in the temporary revisions (TRs) specified in table 1 to this paragraph of this AD that are a part of the maintenance or inspection program revision required by this paragraph, such incorporation may be done by inserting a copy of the applicable TRs specified in table 1 to this paragraph into the applicable ``time limits/maintenance checks'' (TLMC) manuals specified in table 1 to this paragraph. When the applicable TRs specified in table 1 to this paragraph have been included in general revisions of the applicable TLMC manual specified in table 1 to this paragraph, the general revisions may be inserted in the applicable TLMC manual specified in table 1 to this paragraph.

Table 1 to Paragraph (g) of This AD--Tasks ----------------------------------------------------------------------------------------------------------------
Canadair service
Affected airplanes Task No. information Initial compliance time ---------------------------------------------------------------------------------------------------------------- Model CL-600-1A11 (CL-600 Variant) 57-40-00-186 Canadair Challenger TR 5- Within 500 flight cycles
airplanes with inboard flaps 158, Inboard Flap--Hinge after the effective date
having greater than 7,400 total Box Forward Lugs, dated of this AD, but not later
flight cycles but equal to or less July 8, 2013, of the than 15,100 total flight
than 14,850 total flight cycles as Canadair Challenger TLMC cycles.
of the effective date of this AD. Manual, PSP 605. Model CL-600-1A11 (CL-600 Variant) 57-40-00-186 Canadair Challenger TR 5- Within 250 flight cycles
airplanes with inboard flaps 158, Inboard Flap--Hinge after the effective date
having greater than 14,850 total Box Forward Lugs, dated of this AD.
flight cycles as of the effective July 8, 2013, of the
date of this AD. Canadair Challenger TLMC
Manual, PSP 605. Model CL-600-1A11 (CL-600 Variant) 57-40-00-186 Canadair Challenger TR 5- Before the accumulation of
airplanes with inboard flaps 158, Inboard Flap--Hinge 7,900 total flight cycles.
having equal to or less than 7,400 Box Forward Lugs, dated
total flight cycles. July 8, 2013, of the
Canadair Challenger TLMC
Manual, PSP 605. Model CL-600-1A11 (CL-600 Variant) 57-40-00-160 Canadair Challenger TR 5- Within 500 flight cycles
airplanes with outboard flaps 157, Outboard Flap--Hinge after the effective date
having greater than 7,500 total Box Forward Lugs, dated of this AD, but no later
flight cycles, but equal to or July 8, 2013, of the than 11,600 total flight
less than 11,350 total flight Canadair Challenger TLMC cycles.
cycles as of the effective date of Manual, PSP 605.
this AD. Model CL-600-1A11 (CL-600 Variant) 57-40-00-160 Canadair Challenger TR 5- Within 250 flight cycles
airplanes with outboard flaps 157, Outboard Flap--Hinge after the effective date
having greater than 11,350 total Box Forward Lugs, dated of this AD.
flight cycles as of the effectiveJuly 8, 2013, of the
date of this AD. Canadair Challenger TLMC
Manual, PSP 605. Model CL-600-1A11 (CL-600 Variant) 57-40-00-160 Canadair Challenger TR 5- Before the accumulation of
airplanes with outboard flaps 157, Outboard Flap--Hinge 8,000 total flight cycles.
having equal to or less than 7,500 Box Forward Lugs, dated
total flight cycles. July 8, 2013, of the
Canadair Challenger TLMC
Manual, PSP 605. Model CL-600-2A12 (CL-601 Variant) 57-40-01-101 Canadair Challenger TR 5- Within 500 flight cycles
airplanes with inboard flaps 262, Inboard Flap--Hinge after the effective date
having greater than 7,400 total Box Forward Lugs, dated of this AD, but no later
flight cycles, but equal to or July 8, 2013, of thethan 15,100 total flight
less than 14,850 total flight Canadair Challenger TLMC cycles.
cycles, as of the effective date Manual, PSP 601-5.
of this AD. Model CL-600-2A12 (CL-601 Variant) 57-40-01-101 Canadair Challenger TR 5- Within 250 flight cycles
airplanes with inboard flaps with 262, Inboard Flap--Hinge after the effective date
greater than 14,850 total flight Box Forward Lugs, dated of this AD.
cycles as of the effective date of July 8, 2013, of the
this AD. Canadair Challenger TLMC
Manual, PSP 601-5. Model CL-600-2A12 (CL-601 Variant) 57-40-01-101 Canadair Challenger TR 5- Before the accumulation of
airplanes with inboard flaps with 262, Inboard Flap--Hinge 7,900 total flight cycles.
equal to or less than 7,400 totalBox Forward Lugs, dated
flight cycles as of the effective July 8, 2013, of the
date of this AD. Canadair Challenger TLMC
Manual, PSP 601-5. Model CL-600-2A12 (CL-601 Variant) 57-40-00-175 Canadair Challenger TR 5- Within 500 flight cycles
airplanes with outboard flaps with 262, Outboard Flap--Hinge after the effective date
greater than 7,500 total flight Box Forward Lugs, dated of this AD, but not later
cycles but equal to or less than July 8, 2013, of the than 11,600 total flight
11,350 total flight cycles as of Canadair Challenger TLMC cycles.
the effective date of this AD. Manual, PSP 601-5. Model CL-600-2A12 (CL-601 Variant) 57-40-00-175 Canadair Challenger TR 5- Within 250 flight cycles
airplanes with outboard flaps262, Outboard Flap--Hinge after the effective date
having greater than 11,350 total Box Forward Lugs, dated of this AD.
flight cycles as of the effective July 8, 2013, of the
date of this AD. Canadair Challenger TLMC
Manual, PSP 601-5.

[[Page 24204]]

Model CL-600-2A12 (CL-601 Variant) 57-40-00-175 Canadair Challenger TR 5- Before the accumulation of
airplanes with outboard flaps 262, Outboard Flap--Hinge 8,000 total flight cycles.
having equal to or less than 7,500 Box Forward Lugs, dated
total flight cycles as of the July 8, 2013, of the
effective date of this AD. Canadair Challenger TLMC
Manual, PSP 601-5. Model CL-600-2B16 (CL-601-3A and - 57-40-01-101 Canadair Challenger TR 5- Within 500 flight cycles
3RVariant) airplanes having S/Ns 276, Inboard Flap--Hinge after the effective date
5001 through 5194 inclusive with Box Forward Lugs, dated of this AD, but not later
inboard flaps having greater than July 8, 2013, of the than 15,100 total flight
7,400 total flight cycles but Canadair Challenger TLMC cycles.
equal to or less than 14,850 total Manual, PSP 601A-5.
flight cycles as of the effective
date of this AD. Model CL-600-2B16 (CL-601-3A and - 57-40-01-101 Canadair Challenger TR 5- Within 250 flight cycles.
3R Variant) airplanes having S/Ns 276, Inboard Flap--Hinge
5001 through 5194 inclusive, with Box Forward Lugs, dated
inboard flaps having greater than July 8, 2013, of the
14,850 total flight cycles as of Canadair Challenger TLMC
the effective date of this AD. Manual, PSP 601A-5. Model CL-600-2B16 (CL-601-3A and - 57-40-01-101 Canadair Challenger TR 5- Before the accumulation of
3R Variant) airplanes having S/Ns 276, Inboard Flap--Hinge 7,900 total flight cycles.
5001 through 5194 inclusive, with Box Forward Lugs, dated
inboard flaps having equal to or July 8, 2013, of the
less than 7,400 total flight Canadair Challenger TLMC
cycles as of the effective date of Manual, PSP 601A-5.
this AD. Model CL-600-2B16 (CL-601-3A and - 57-40-00-174 Canadair Challenger TR 5- Within 500 flight cycles
3R Variant) airplanes having S/Ns 275, Outboard Flap--Hinge after the effective date
5001 through 5194 inclusive, with Box Forward Lugs, dated of this AD, but no later
outboardflaps having greater than July 8, 2013, of the than 11,600 total flight
7,500 total flight cycles but Canadair Challenger TLMC cycles.
equal to or less than 11,350 total Manual, PSP 601A-5.
flight cycles as of the effective
date of this AD. Model CL-600-2B16 (CL-601-3A and - 57-40-00-174 Canadair Challenger TR 5- Within 250 flight cycles
3R Variant) airplanes having S/Ns 275, Outboard Flap--Hinge after the effective date
5001 through 5194 inclusive, with Box Forward Lugs, dated of this AD.
outboard flaps having greater than July 8, 2013, of the
11,350 total flight cycles as of Canadair Challenger TLMC
the effective date of this AD. Manual, PSP 601A-5. Model CL-600-2B16 (CL-601-3A and - 57-40-00-174 Canadair Challenger TR 5- Before the accumulation of
3R Variant) airplanes having S/Ns 275, Outboard Flap--Hinge 8,000 total flight cycles.
5001 through 5194 inclusive, with Box Forward Lugs, dated
outboard flaps having equal to or July 8, 2013, of the
less than 7,500 total flight Canadair Challenger TLMC
cycles as of the effective date of Manual, PSP 601A-5.
this AD. Model CL-600-2B16 (CL-604 Variant) 57-50-00-121 Section 5-10-30, Special Before the accumulation of
airplanes having S/Ns 5301 through Detailed Inspection of the 7,800 total flight cycles,
5665 inclusive, with inboard flaps. Forward Lugs of the or within 500 flight
Inboard Flap Hinge Box, of cycles after the effective
Part 2, Airworthiness date of this AD, whichever
Limitations, of Bombardier occurs later.
CL-604 TLMC Manual,
Revision 20, dated July 8,
2013. Model CL-600-2B16 (CL-604 Variant) 57-52-01-102 Section 5-10-30, Special Before the accumulation of
airplanes, S/Ns 5301 through 5665 Detailed Inspection of the 7,800 total flight cycles,
inclusive. Hinge--Box Forward Lugs of or within 500 flight
the Outboard Flap, of Part cycles after the effective
2, Airworthiness date of this AD, whichever
Limitations, of Bombardier occurs later.
CL-604 TLMC Manual,
Revision 20, dated July 8,
2013. Model CL-600-2B16 (CL-604 Variant) 57-50-00-121 Section 5-10-30, Special Before the accumulation of
airplanes, S/Ns 5701 through 5953 Detailed Inspection of the 7,800 total flight cycles,
inclusive. Forward Lugs of the or within 500 flight
Inboard Flap Hinge Box, of cycles after the effective
Part 2, Airworthiness date of this AD, whichever
Limitations, of Bombardier occurs later.
CL-605 TLMC Manual,
Revision 8, dated July 8,
2013. Model CL-600-2B16 (CL-604 Variant) 57-52-01-102 Section 5-10-30, Special Before the accumulation of
airplanes, S/Ns 5701 through 5953 Detailed Inspection of the 7,800 total flight cycles,
inclusive. Hinge--Box Forward Lugs of or within 500 flight
the Outboard Flap, of Part cycles after the effective
2, Airworthiness date of this AD, whichever
Limitations, of Bombardier occurs later.
CL-605 TLMC Manual,
Revision 8, dated July 8,
2013. ----------------------------------------------------------------------------------------------------------------

. [[Page 24205]]

(h) Lug Edge Measurement and Inspection

At the applicable times specified in table 2 to this paragraph and paragraph (i)(1) of this AD, measure the forward lug edge distance of all flap hinge boxes, and do a general visual inspection for cracking and damage (i.e., deformation or bearing failure) of the forward lug edge of all flap hinge boxes, in accordance with the applicable service bulletin specified in table 2 to this paragraph and paragraph (i)(1) of this AD.

Table 2 to Paragraphs (h) and (i)(1) of This AD--Compliance Times for Lug Edge Measurement and Inspection ----------------------------------------------------------------------------------------------------------------
Airplane models Affected flaps Compliance time Service information ---------------------------------------------------------------------------------------------------------------- Model CL-600-1A11 (CL-600) airplanes Inboard flaps having Before the accumulation Bombardier Service
having S/N 1004 through 1085 less than or equal to of 7,900 total flight Bulletin 600-0762,
inclusive.7,400 total flight cycles, or within 48 dated September 26,
cycles as of the months after the 2013.
effective date of this effective date of this
AD. AD, whichever occurs
first. Model CL-600-1A11 (CL-600) airplanes Inboard flaps having Before the accumulation Bombardier Service
having S/N 1004 through 1085 greater than 7,400 of 15,100 total flight Bulletin 600-0762,
inclusive. total flight cycles, cycles, or within 500 dated September 26,
but equal to or less flight cycles or 48 2013.
than 14,850 total months after the
flight cycles as of effective date of this
the effective date of AD, whichever occurs
this AD. first. Model CL-600-1A11 (CL-600) airplanes Inboard flaps having Within 250 flight Bombardier Service
having S/N 1004 through 1085 greater than 14,850 cycles or 48 months Bulletin 600-0762,
inclusive. total flight cycles as after the effective dated September 26,
of the effective date date of this AD, 2013.
of this AD. whichever occurs first. Model CL-600-1A11 (CL-600) airplanes Outboard flaps having Before the accumulation Bombardier Service
having S/N 1004 through 1085 equal to or less than of 8,000 total flight Bulletin 600-0762,
inclusive. 7,500 total flight cycles, or within 48 dated September 26,
cycles as of the months after the 2013.
effective date of this effective date of this
AD. AD, whichever occurs
first. Model CL-600-1A11 (CL-600) airplanes Outboard flaps having Within 500 flight Bombardier Service
having S/N 1004 through 1085 greater than 7,500 cycles or 48 months Bulletin 600-0762,inclusive. total flight cycles after the effective dated September 26,
but less than or equal date of this AD, 2013.
to 11,350 total flight whichever occurs
cycles as of the first; but not
effective date of this exceeding 11,600 total
AD. flight cycles. Model CL-600-1A11 (CL-600) airplanes Outboard flaps having Within 250 flight Bombardier Service
having S/N 1004 through 1085 greater than 11,350 cycles or within 48 Bulletin 600-0762,
inclusive. total flight cycles as months after the dated September 26,
of the effective date effective date of this 2013.
of this AD. AD, whichever occurs
first. Model CL-600-2A12 (CL-601 Variant) Inboard flaps having Before the accumulation Bombardier Service
and CL-600-2B16 (CL-601-3A and -3R less than or equal to of 7,900 total flight Bulletin 601-0631,
Variants) airplanes having S/N 3001 7,400 total flight cycles, or within 48 dated September 26,
through 3066 inclusive, and 5001 cycles as of the months after the 2013.
through 5194 inclusive. effective date of this effective date of this
AD. AD, whichever occurs
first. Model CL-600-2A12 (CL-601 Variant) Inboard flaps having Within 500 flight Bombardier Service
and CL-600-2B16 (CL-601-3A and -3R greater than 7,400 cycles or within 48 Bulletin 601-0631,
Variant) airplanes having S/N 3001 total flight cycles, months after the dated September 26,
through 3066 inclusive, and 5001 but equal to or less effective date of this 2013.
through 5194 inclusive. than 14,850 total AD, whichever occurs
flight cycles, as of first; but not
the effective date of exceeding 15,100 total
this AD.flight cycles. Model CL-600-2A12 (CL-601 Variant) Inboard flaps having Within 250 flight Bombardier Service
and CL-600-2B16 (CL-601-3A and -3R greater than 14,850 cycles or within 48 Bulletin 601-0631,
Variant) airplanes having S/N 3001 total flight cycles as months after the dated September 26,
through 3066 inclusive, and 5001 of the effective date effective date of this 2013.
through 5194 inclusive. of this AD. AD, whichever occurs
first. Model CL-600-2A12 (CL-601 Variant) Outboard flaps having Before the accumulation Bombardier Service
and CL-600-2B16 (CL-601-3A and -3R less than or equal to of 8,000 total flight Bulletin 601-0631,
Variant) airplanes having S/N 3001 7,500 total flight cycles, or within 48 dated September 26,
through 3066 inclusive, and 5001 cycles as of the months after the 2013.
through 5194 inclusive. effective date of this effective date of this
AD. AD, whichever occurs
first. Model CL-600-2A12 (CL-601 Variant) Outboard flaps having Within 500 flight Bombardier Service
and CL-600-2B16 (CL-601-3A and -3R greater than 7,500 cycles or within 48 Bulletin 601-0631,
Variant) airplanes having S/N 3001 total flight cycles, months after the dated September 26,
through 3066 inclusive, and 5001 but equal to or less effective date of this 2013.
through 5194 inclusive. than 11,350 total AD; but not exceeding
flight cycles, as of 11,600 total flight
the effective date of cycles.
this AD. Model CL-600-2A12 (CL-601 Variant) Outboard flaps having Within 250 flight Bombardier Service
and CL-600-2B16 (CL-601-3A and -3R greater than 11,350 cycles or 48 months Bulletin 601-0631,
Variant) airplanes having S/N 3001 total flight cycles as after the effective dated September 26,
through 3066 inclusive, and 5001 of the effective date date of this AD, 2013.
through 5194 inclusive. of this AD. whichever occurs first.

[[Page 24206]]

Model CL-600-2B16 (CL-604 Variant) Outboard and inboard Before the accumulation Bombardier Service
airplanes having S/Ns 5301 through flaps. of 7,800 total flight Bulletin 604-57-007,
5665 inclusive. cycles or within 48 Revision 01, dated
months after the November 12, 2014.
effective date of this
AD, whichever occurs
first. Model CL-600-2B16 (CL-604 Variant) Outboard and inboard Before the accumulation Bombardier Service
airplanes having S/Ns 5701 through flaps. of 7,800 total flight Bulletin 605-57-005,
5953 inclusive.cycles or within 48 Revision 01, dated
months after the November 12, 2014.
effective date of this
AD, whichever occurs
first. ----------------------------------------------------------------------------------------------------------------

(i) Corrective Actions

(1) If, during the measurement required by paragraph (h) of this AD, the lug edge distance is equal to or greater than the limit specified in the applicable service bulletin specified in table 2 to paragraph (h) of this AD and this paragraph, no further action is required by this paragraph.
(2) If, during the measurement required by paragraph (h) of this AD, the lug edge distance is below the limit specified in the applicable service bulletin specified in table 2 to paragraphs (h) and (i)(1) of this AD, before further flight, repair using a method approved by the Manager, New York ACO, ANE-170, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.'s TCCA Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature.
(3) If, during the inspection required by paragraph (h) of this AD, any cracking or damage is found, before further flight, repair using a method approved by the Manager, New York ACO, ANE-170, FAA; or TCCA; or Bombardier, Inc.'s TCCA DAO. If approved by the DAO, the approval must include the DAO-authorized signature.

(j) No Alternative Actions or Intervals

After accomplishing the revision required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance in accordance with the procedures specified in paragraph (l) of this AD.

(k) Credit for Previous Actions

This paragraph provides credit for actions required by paragraphs (g) and (h) of this AD, if those actions were performed before the effective date of this AD using Bombardier Service Bulletin 604-57-007, dated September 26, 2013 (for Model CL-600-2B16 airplanes); or Bombardier Service Bulletin 605-57-005, dated September 26, 2013 (for Model CL-600-2B16 airplanes); which are not incorporated by reference in this AD.

(l) Other FAA AD Provisions

The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New York ACO, ANE-170, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the ACO, send it to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228- 7300; fax 516-794-5531. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. The AMOC approval letter must specifically reference this AD.
(2) Contacting the Manufacturer: For any requirement in this AD to obtain corrective actions from a manufacturer, the action must be accomplished using a method approved by the Manager, New York ACO, ANE-170, Engine and Propeller Directorate, FAA; or TCCA; or Bombardier, Inc.'s TCCA DAO. If approved by the DAO, the approval must include the DAO-authorized signature.

(m) Related Information

(1) Refer to Mandatory Continuing Airworthiness Information (MCAI) Canadian Airworthiness Directive CF-2014-01, dated January 3, 2014, for related information. This MCAI may be found in the AD docket on the Internet at http://www.regulations.gov/#!documentDetail;D=FAA-2014-0491-0004.
(2) Service information identified in this AD that is not incorporated by reference is available at the addresses specified in paragraphs (n)(3) and (n)(4) of this AD.

(n) Material Incorporated by Reference

(1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do the actions required by this AD, unless this AD specifies otherwise.
(i) Bombardier Service Bulletin 600-0762, dated September 26, 2013.
(ii) Bombardier Service Bulletin 601-0631, dated September 26, 2013.
(iii) Bombardier Service Bulletin 604-57-007, Revision 01, dated November 12, 2014.
(iv) Bombardier Service Bulletin 605-57-005, Revision 01, dated November 12, 2014.
(v) Canadair Challenger Temporary Revision 5-157, Outboard Flap--Hinge Box Forward Lugs, dated July 8, 2013, to Canadair Challenger Time Limits/Maintenance Checks Manual, PSP 605.
(vi) Canadair Challenger Temporary Revision 5-158, Inboard Flap--Hinge Box Forward Lugs, dated July 8, 2013, to Canadair Challenger Time Limits/Maintenance Checks Manual, PSP 605.
(vii) Canadair Challenger Temporary Revision 5-262, Outboard and Inboard Flap--Hinge Box Forward Lugs, dated July 8, 2013, to Canadian Challenger Time Limits/Maintenance Checks Manual PSP 601.
(viii) Canadair Challenger Temporary Revision 5-275, Outboard Flap--Hinge Box Forward Lugs, dated July 8, 2013, to Canadian Challenger Time Limits/Maintenance Checks Manual PSP 601A-5.
(ix) Canadair Challenger Temporary Revision 5-276, Inboard Flap--Hinge Box Forward Lugs, dated July 8, 2013, to Canadian Challenger Time Limits/Maintenance Checks Manual PSP 601A-5.
(x) Task 57-50-00-121 Special Detailed Inspection of the Forward Lugs of the Inboard Flap Hinge Box of Section 5-10-30 of Part 2, ``Airworthiness Limitations,'' of Bombardier CL-605 Time Limits/ Maintenance Checks Manual, Revision 8, dated July 8, 2013.
(xi) Task 57-50-00-121 Special Detailed Inspection of the Forward Lugs of the Inboard Flap Hinge Box of Section 5-10-30 of Part 2, ``Airworthiness Limitations,'' of Bombardier CL-604 Time Limits/Maintenance Checks Manual, Revision 20, dated July 8, 2013.
(xii) Task 57-52-01-102 Special Detailed Inspection of the Hinge--Box Forward Lugs of the Outboard Flap of Section 5-10-30 of Part 2, ``Airworthiness Limitations,'' of Bombardier CL-605 Time Limits/Maintenance Checks Manual, Revision 8, dated July 8, 2013.
(xiii) Task 57-52-01-102 Special Detailed Inspection of the Hinge--Box Forward Lugs of the Outboard Flap of Section 5-10-30 of Part 2, ``Airworthiness Limitations,'' of Bombardier CL-604 Time Limits/Maintenance Checks Manual, Revision 20, dated July 8, 2013.
(3) For service information identified in this AD, contact Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855- 7401; email thd.crj@aero.bombardier.com; Internet http://www.bombardier.com.

[[Page 24207]]

(4) You may view this serviceinformation at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425-227-1221.
(5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain Bombardier, Inc. Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL- 601-3A, CL-601-3R, and CL-604 Variants) airplanes. The NPRM published in the Federal Register on August 4, 2014 (79 FR 45140). The NPRM was prompted by a determination that the forward lugs of the flap hinge box might not conform to engineering drawings, which could result in premature fatigue cracking. The NPRM proposed to require revising the maintenance or inspection program to include new airworthiness limitations tasks; and measuring the forward lug edge distance of each flap hinge box, inspecting for cracking and damage (i.e., deformation or bearing failure) of the forward lug edge of each flap hinge box, and repairing any cracking or damage if necessary. We are issuing this AD to detect and correct non-conforming flap hinge box forward lugs, which could result in failure of the lugs and detachment of the flap hinge box and consequent detachment of the flap surface.
Transport Canada Civil Aviation (TCCA), which is the aviation authority for Canada, has issued Canadian Airworthiness Directive CF- 2014-01, dated January 3, 2014 (referred to after this as the Mandatory Continuing Airworthiness Information, or ``the MCAI''), to correct an unsafe condition for certain Bombardier, Inc. Model CL-600-1A11 (CL- 600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) airplanes. The MCAI states:

The aeroplane manufacturer has determined that the flap hinge box forward lugs edge distance may not conform to the engineering drawings. Non-conforming flap hinge box forward lugs may result in premature fatigue cracking.
Failure of the lugs could lead to the detachment of the flap hinge box and consequently the detachment of the flap surface. The loss of a flap surface could adverselyaffect the continued safe operation of the aeroplane.
This [Canadian] AD mandates the incorporation of new Time Limits/Maintenance Checks (TLMC) Airworthiness Limitations (AWL) tasks, and the measurement [and inspection for cracking and damage] of the forward lug edge distance of each flap hinge-box and rectification as required.

Corrective actions include repairing damage and cracking. You may examine the MCAI in the AD docket on the Internet at http:// www.regulations.gov/

[[Page 24201]]

#!documentDetail;D=FAA-2014-0491-0002.

Comments

We gave the public the opportunity to participate in developing this AD. The following presents the comments received on the NPRM (79 FR 45140, August 4, 2014) and the FAA's response to each comment.

Request To Include Latest Revision of Service Information

Bombardier, Inc. requested that we revise the NPRM (79 FR 45140, August 4, 2014) to reflect the latest revisions of certain service information.
We agree to include the latest revisions of certain service information. Bombardier has issued Service Bulletin 604-57-007, Revision 01, dated November 12, 2014 (for Model CL-600-2B16 airplanes); and Service Bulletin 605-57-005, Revision 01, dated November 12, 2014 (for Model CL-600-2B16 airplanes). This new service information does not add new work for the affected airplanes and was revised to update labor hours needed to perform the work and clarify work instructions. We have changed this AD to reference Bombardier Service Bulletin 604- 57-007, Revision 01, dated November 12, 2014; and Bombardier Service Bulletin 605-57-005, Revision 01, dated November 12, 2014, throughout. We have also added a new paragraph (k) to this AD to give credit for actions performed before the effective date of this AD using Bombardier Service Bulletin 604-57-007, dated September 26, 2013; and Bombardier Service Bulletin 605-57-005, dated September 26, 2013. We redesignated subsequent paragraphs accordingly.

Request To Correct Typographical Errors

Bombardier, Inc., and an FAA airframe and powerplant mechanic noted typographical errors in Table 1 of the NPRM (79 FR 45140, August 4, 2014) and requested they be corrected.
We agree that there are typographical errors. We have revised table 1 to paragraph (g) of this AD. The temporary revision (TR) number has been corrected to read ``5-275,'' in certain rows of table 1 to paragraph (g) of this AD, where in the NPRM (79 FR 45140, August 4, 2014) the previous TR number read ``5-276.'' The revision of Bombardier CL-604 Time Limits/Maintenance Checks Manual, dated July 8, 2013, was corrected from revision ``8'' to revision ``20.''

Explanation of Additional Change Made to This Final Rule

We have removed Note 1 to paragraph (g) from this final rule. Instead, we have included that information in paragraph (g) of this AD.

Conclusion

We reviewed the relevant data, considered the comments received, and determined that air safety and the public interest require adopting this AD with the changes described previously and minor editorial changes. We have determined that these minor changes:
Are consistent with the intent that was proposed in the NPRM (79 FR 45140, August 4, 2014) for correcting the unsafe condition; and
Do not add any additional burden upon the public than was already proposed in the NPRM (79 FR 45140, August 4, 2014).
We also determined that these changes will not increase the economic burden on any operator or increase the scope of this AD.

Related Service Information Under 1 CFR Part 51

Bombardier has issued the following service information.
Bombardier Service Bulletin 600-0762, dated September 26, 2013. This service information describes procedures for measuring the edge-to-edge distance of the forward lugs for the flap hinge boxes and contacting the manufacturer for corrective actions for Bombardier, Inc. Model CL-600-1A11 (CL-600) airplanes.
Bombardier Service Bulletin 601-0631, dated September 26, 2013. This service information describes procedures for measuring the edge- to-edge distance of the forward lugs for the flap hinge boxes and contacting the manufacturer for corrective actions for Bombardier, Inc. Model CL-600-2A12 (CL-601 Variant) and CL-600-2B16 (CL-601-3A and -3R Variant) airplanes.
Bombardier Service Bulletin 604-57-007, Revision 01, dated November 12, 2014. This service information describes procedures for measuring the edge-to-edge distance of the forward lugs for the flap hinge boxes and contacting the manufacturer for corrective actions for Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes having serial numbers (S/Ns) 5301 through 5665 inclusive.
Bombardier Service Bulletin 605-57-005, Revision 01, dated November 12, 2014. This service information describes procedures for measuring the edge-to-edge distance of the forward lugs for the flap hinge boxes and contacting the manufacturer for corrective actions for Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes having S/ Ns 5701 through 5953 inclusive.
Canadair Challenger Temporary Revision 5-157, dated July 8, 2013, to Outboard Flap--Hinge Box Forward Lugs, to Canadair Challenger Time Limits/Maintenance Checks Manual, PSP 605. This service information describes an airworthiness limitations task and compliance times for inspecting the forward lugs of the outboard flap hinge box for Bombardier, Inc. Model CL-600-1A11 (CL-600) airplanes.
Canadair Challenger Temporary Revision 5-158, Inboard Flap--Hinge Box Forward Lugs, dated July 8, 2013, to Canadair Challenger Time Limits/Maintenance Checks Manual, PSP 605. This service information describes an airworthiness limitations task and compliance times for inspecting the forward lugs of the inboard flap hinge box for Bombardier, Inc. Model CL-600-1A11 (CL-600) airplanes.
Canadair Challenger Temporary Revision 5-262, Outboard and Inboard Flap--Hinge Box Forward Lugs, datedJuly 8, 2013, to Canadian Challenger Time Limits/Maintenance Checks Manual PSP 601. This service information describes airworthiness limitations tasks and compliance times for inspecting the forward lugs of the outboard and inboard flap hinge boxes for Bombardier, Inc. Model CL-600-2A12 (CL-601) airplanes.
Canadair Challenger Temporary Revision 5-275, Outboard Flap--Hinge Box Forward Lugs, dated July 8, 2013, to Canadian Challenger Time Limits/Maintenance Checks Manual PSP 601A-5. This service information describes an airworthiness limitations task and compliance times for inspecting the forward lugs of the outboard flap hinge box for Bombardier, Inc. Model CL-600-2B16 (CL-601-3A Variants) airplanes.
Canadair Challenger Temporary Revision 5-276, Inboard Flap--Hinge Box Forward Lugs, dated July 8, 2013, to Canadian Challenger Time Limits/Maintenance Checks Manual PSP 601A-5. This service information describes an airworthiness limitations task and compliance times for inspecting the forward lugs of the inboard flap hinge box for Bombardier, Inc. Model CL-600-2B16 (CL-601-3A and CL-601- 3R Variant) airplanes.
Task 57-50-00-121, Special Detailed Inspection of the Forward Lugs of the Inboard Flap Hinge Box, of Section 5-10-30 of Part 2, ``Airworthiness Limitations,'' of

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Bombardier CL-605 Time Limits/Maintenance Checks Manual, Revision 8, dated July 8, 2013. This service information describes an airworthiness limitations task and compliance times for inspecting the forward lugs of the inboard flap hinge box for Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes, having S/Ns 5701 through 5953 inclusive.
Task 57-50-00-121, Special Detailed Inspection of the Forward Lugs of the Inboard Flap Hinge Box, of Section 5-10-30 of Part 2, ``Airworthiness Limitations,'' of Bombardier CL-604 Time Limits/ Maintenance Checks Manual, Revision 20, dated July 8, 2013. This service information describes an airworthiness limitations task and compliance times for inspecting the forward lugs of the inboard flap hinge box of Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes, having S/Ns 5301 through 5665 inclusive.
Task 57-52-01-102, Special Detailed Inspection of the Hinge--Box Forward Lugs of the Outboard Flap, of Section 5-10-30 of Part 2, ``Airworthiness Limitations,'' of Bombardier CL-605 Time Limits/Maintenance Checks Manual, Revision 8, dated July 8, 2013. This service information describes an airworthiness limitations task and compliance times for inspecting the forward lugs of the outboard flap hinge box of Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes, having S/Ns 5701 through 5953 inclusive.
Task 57-52-01-102, Special Detailed Inspection of the Hinge--Box Forward Lugs of the Outboard Flap, of Section 5-10-30 of Part 2, ``Airworthiness Limitations,'' of Bombardier CL-604 Time Limits/Maintenance Checks Manual, Revision 20, dated July 8, 2013. This service information describes an airworthiness limitations task and compliance times for inspecting the forward lugs of the outboard flap hinge box of Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes, having S/Ns 5301 through 5665 inclusive.
This service information is reasonably available; see ADDRESSES for ways to access this service information.

Costs of Compliance

We estimate that this AD affects 105 airplanes of U.S. registry.
We also estimate that it will take about 45 work-hours per product to comply with the basic requirements of this AD. The average labor rate is $85 per work-hour. Based on these figures, we estimate the cost of this AD on U.S. operators to be $401,625, or $3,825 per product.
We have received no definitive data that would enable us to provide cost estimates for the cost of parts or on-condition actions specified in this AD.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. ``Subtitle VII: Aviation Programs,'' describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in ``Subtitle VII, Part A, Subpart III, Section 44701: General requirements.'' Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.

Regulatory Findings

We determined that this AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify that this AD:
1. Is not a ``significant regulatory action'' under Executive Order 12866;
2. Is not a ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979);
3. Will not affect intrastate aviation in Alaska; and
4. Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

Examining the AD Docket

You may examine the AD docket on the Internet at http://www.regulations.gov/#!docketDetail;D=FAA-2014-0491; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Operations office (telephone 800-647- 5527) is in the ADDRESSES section.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.