AD 2018-20-11 ACTIVE

We are adopting a new airworthiness directive (AD) for certain

Bombardier, Inc., Model DHC-8-300 series airplanes. This AD was

prompted by reports indicating that a certain emergency exit door could

not be opened during maintenance. This AD requires a detailed

inspection of the ball bearings of an emergency exit, replacement of

bearings if necessary, application of corrosion inhibiting compound

(CIC), and revision of the maintenance or inspection program, as

applicable. We are issuing this AD to address the unsafe condition on

these products.

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

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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]

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2. The FAA amends Sec. 39.13 by adding the following new airworthiness

directive (AD):

2018-20-11 Bombardier, Inc.: Amendment 39-19445; Docket No. FAA-

2018-0586; Product Identifier 2017-NM-151-AD.

(a) Effective Date

This AD is effective November 23, 2018.

(b) Affected ADs

None.

(c) Applicability

This AD applies to Bombardier, Inc., Model DHC-8-301, -311, and

-315 airplanes, certificated in any category, serial numbers 100

through 672 inclusive.

(d) SubjectAir Transport Association (ATA) of America Code 52, Doors.

(e) Reason

This AD was prompted by reports indicating that the forward

right-hand type I emergency exit door could not be opened during

maintenance. An investigation determined that the exit door handle

was jammed due to corroded center and lower shaft ball bearings. We

are issuing this AD to address corrosion of the emergency exit door

ball bearings, which could result in the inability to open the

emergency exit door

[[Page 52756]]

during an emergency evacuation and consequently impede airplane

egress.

(f) Compliance

Comply with this AD within the compliance times specified,

unless already done.

(g) Revision of Maintenance or Inspection Program

Within 60 days after the effective date of this AD: Revise the

maintenance or inspection program, as applicable, to incorporate de

Havilland Inc. Dash 8 Series 300 Maintenance Task Card Task Number

5220/12 (``Servicing of Forward RH Emergency Exit Mechanisms''),

dated March 15, 2017; and Temporary Revision 54-042, dated April 10,

2018, to the DHC-8-300 Aircraft Maintenance Manual (AMM). The

initial compliance time for doing the task is at the time specified

in de Havilland Inc. Dash 8 Series 300 Maintenance Task Card Task

Number 5220/12 (``Servicing of Forward RH Emergency Exit

Mechanisms''), dated March 15, 2017, or within 60 days after the

effective date of this AD, whichever occurs later.

(h) Inspection and Replacement

Within 5,000 flight hours or 36 months, whichever occurs first,

after the effective date of this AD: Do a detailed inspection of all

ball bearings of the forward right-hand type I emergency exit for

corrosion, seal damage, and loss of lubricant; replace bearings as

applicable; and apply corrosion inhibiting compound (CIC); in

accordance with the Accomplishment Instructions of Bombardier

Service Bulletin 8-52-65, dated July 26, 2017. Do all applicable

replacements before further flight.

(i) No Alternative Actions or Intervals

After the maintenance or inspection program has been revised as

required by paragraph (g) of this AD, no alternative actions (e.g.,

inspections) or intervals may be used unless the actions and

intervals are approved as an alternative method of compliance (AMOC)

in accordance with the procedures specified in paragraph (j)(1) of

this AD.

(j) Other FAA AD Provisions

The following provisions also apply to this AD:

(1) Alternative Methods of Compliance (AMOCs): The Manager, New

York ACO Branch, 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 orlocal Flight Standards District Office, as appropriate.

If sending information directly to the manager of the certification

office, send it to ATTN: Program Manager, Continuing Operational

Safety, FAA, New York ACO Branch, 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.

(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

Branch, 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.

(k)Related Information

(1) Refer to Mandatory Continuing Airworthiness Information

(MCAI) Canadian Airworthiness Directive CF-2017-30, dated August 30,

2017, for related information. This MCAI may be found in the AD

docket on the internet at http://www.regulations.gov by searching

for and locating Docket No. FAA-2018-0586.

(2) For more information about this AD, contact Darren Gassetto,

Aerospace Engineer, Airframe and Propulsion Section, FAA, New York

ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;

telephone 516-228-7323; fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.

(l) 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 8-52-65, dated July 26, 2017.

(ii) de Havilland Inc. Dash 8 Series 300 Maintenance Task Card

Task Number 5220/12 (``Servicing of Forward RH Emergency Exit

Mechanisms''), dated March 15, 2017.

(iii) Temporary Revision (TR) 54-042, dated April 10, 2018, to

the DHC-8-300 Aircraft Maintenance Manual (AMM).

(3) For service information identified in this AD, contact

Bombardier, Inc., Q-Series Technical Help Desk, 123 Garratt

Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416-375-4000;

fax 416-375-4539; email thd.qseries@aero.bombardier.com; internet

http://www.bombardier.com.

(4) You may view this service information at the FAA, Transport

Standards Branch, 2200 South 216th St., Des Moines, WA. For

information on the availability of this material at the FAA, call

206-231-3195.

(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 DHC-8-300 series airplanes. The NPRM published in the Federal

Register on July 6, 2018 (83 FR 31496). The NPRM was prompted by

reports indicating that a certain emergency exit door could not be

opened during maintenance. The NPRM proposed to require a detailed

inspection of the ball bearings of an emergency exit, replacement of

bearings if necessary, application of CIC, and revision of the

maintenance or inspection program, as applicable.

We are issuing this AD to address corrosion of the emergency exit

door ball bearings, which could result in the inability to open the

emergency exit door during an emergency evacuation and consequently

impede airplane egress.

Transport Canada Civil Aviation (TCCA), which is the aviation

authority for Canada, has issued Canadian Airworthiness Directive CF-

2017-30, dated August 30, 2017 (referred to after this as the Mandatory

Continuing Airworthiness Information, or ``the MCAI''), to correct an

unsafe condition for certain Bombardier, Inc., Model DHC-8-300 series

airplanes. The MCAI states:

An operator has reported the inability to open the Forward Right

Hand Type I emergency exit door with either the internal or external

handle during maintenance. Investigation has determined that the

handle was found to be jammed due to corroded center and lower shaft

ball bearings. Condensation has been found to be the root cause of

the Forward Right Hand Type I emergency exit door hardware

corrosion. Other Forward Right Hand Type I emergency exit door ball

bearings are also susceptible to corrosion. Inability to open the

Forward Right Hand Type I emergency exit door during an emergency

evacuation may impede aircraftegress.

This [Canadian] AD mandates the inspection for corrosion and

replacement, as required, of all Forward Right Hand Type I emergency

exit door ball bearings, and the application of corrosion inhibiting

compound (CIC), to ensure that the Forward Right Hand Type I

emergency exit door can be opened when required.

You may examine the MCAI in the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-

0586.

Comments

We gave the public the opportunity to participate in developing

this final rule. We have considered the comment received. The Air Line

Pilots Association, International (ALPA) indicated its support for the

NPRM.

Conclusion

We reviewed the relevant data, considered the comment received, and

determined that air safety and the public interest require adopting

this final rule as proposed, except for minor editorial changes. We

have determined that these minor changes:

Are consistent with the intent that was proposed in the

NPRM for addressing the unsafe condition; and

Do not add any additional burden upon the public than was

already proposed in the NPRM.

Related Service Information Under 1 CFR Part 51

Bombardier has issued the following service information:

Service Bulletin 8-52-65, dated July 26, 2017, which

describes procedures for a detailed inspection of the forward right-

hand type I emergency exit door ball bearings for corrosion, seal

damage, and loss of lubricant; applying CIC; and replacing emergency

exit door ball bearings if necessary.

de Havilland Inc. Dash 8 Series 300 MaintenanceTask Card

Task Number 5220/12 (``Servicing of Forward RH Emergency Exit

Mechanisms''), dated March 15, 2017, which describes procedures for

servicing the forward right-hand emergency exit door mechanisms.Temporary Revision (TR) 54-042, dated April 10, 2018, to

the DHC-8-300 Aircraft Maintenance Manual (AMM), which describes

procedures for servicing the type I emergency exit door mechanisms.

This service information is reasonably available because the

interested parties have access to it through their normal course of

business or by the means identified in the ADDRESSES section.

[[Page 52755]]

Costs of Compliance

We estimate that this AD affects 16 airplanes of U.S. registry.

We estimate the following costs to comply with this AD:

Estimated Costs for Required Actions

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Cost per Cost on U.S.

Labor cost Parts cost product operators

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3 work-hours x $85 per hour = $255........................... $0 $255 $4,080

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We have determined that revising the maintenance or inspection

program takes an average of 90 work-hours per operator, although we

recognize that this number may vary from operator to operator. In the

past, we have estimated that this action takes 1 work-hour per

airplane. Since operators incorporate maintenance or inspection program

changes for their affected fleet(s), we have determined that a per-

operator estimate is more accurate than a per-airplane estimate.

Therefore, we estimate the total cost per operator to be $7,650 (90

work-hours x $85 per work-hour).

We estimate the following costs to do any necessary on-condition

actions that would be required based on the results of any required

actions. We have no way of determining the number of aircraft that

might need these on-condition actions:

Estimated Costs of On-Condition Actions

------------------------------------------------------------------------

Cost per

Labor cost Parts cost product

------------------------------------------------------------------------

6 work-hours x $85 per hour = $510.... $586 $1,096

------------------------------------------------------------------------

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.

This AD is issued in accordance with authority delegated by the

Executive Director, Aircraft Certification Service, as authorized by

FAA Order 8000.51C. In accordance with that order, issuance of ADs is

normally a function of the Compliance and Airworthiness Division, but

during this transition period, the Executive Director has delegated the

authority to issue ADs applicable to transport category airplanes and

associated appliances to the Director of the System Oversight Division.

Regulatory Findings

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.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by

reference, Safety.

The Director of the Federal Register approved the incorporation by

reference of certain publications listed in this AD as of November 23,

2018.

ADDRESSES: For service information identified in this final rule,

contact Bombardier, Inc., Q-Series Technical Help Desk, 123 Garratt

Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416-375-4000;

fax 416-375-4539; email thd.qseries@aero.bombardier.com; internet

http://www.bombardier.com. You may view this service information at the

FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA.

For information on the availability of this material at the FAA, call

206-231-3195. It is also available on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-

0586.

Examining the AD Docket

You may examine the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-0586; or in person at Docket Operations between 9 a.m. and 5 p.m.,

Monday through Friday, except Federal holidays. The AD docket contains

this final rule, the regulatory evaluation, any comments received, and

other information. The address for Docket Operations (phone: 800-647-

5527) is U.S. Department of Transportation, Docket Operations, M-30,

West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE,

Washington, DC 20590.

Darren Gassetto, Aerospace Engineer,

Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart

Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7323; fax 516-

794-5531; email 9-avs-nyaco-cos@faa.gov.