AD 2018-03-01

We are adopting a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model AB139 and AW139 helicopters. This AD requires inspecting the main rotor blade (MRB) tip cap for disbonding. This AD is prompted by a report of the in-flight loss of an MRB tip cap. The actions of this AD are intended to prevent an unsafe condition on these helicopters.

Final rule; request for comments.

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):

2018-03-01 Agusta S.p.A.: Amendment 39-19174; Docket No. FAA-2017- 0939; Product Identifier 2017-SW-057-AD.

(a) Applicability

This AD applies to Agusta S.p.A. Model AB139 and AW139 helicopters, certificated in any category, with a main rotor blade (MRB) part number (P/N) 3G6210A00131 with a serial number (S/N) 3615, 3634, 3667, or 3729 installed.

(b) Unsafe Condition

This AD defines the unsafe condition as disbonding of an MRB tip cap. This condition could result in loss of the MRB tip cap, severe vibrations, and subsequent loss ofcontrol of the helicopter.

(c) Effective Date

This AD becomes effective February 14, 2018.

(d) Compliance

You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.

(e) Required Actions

(1) Within 5 hours time-in-service (TIS), using a tap hammer or equivalent, tap inspect each MRB tip cap for disbonding in the area depicted in Figure 1 of Leonardo Helicopters Emergency Alert Service Bulletin No. 139-508, dated September 12, 2017 (EASB).
(i) If there is any disbonding, before further flight, remove the MRB from service.
(ii) If there is no disbonding, within 10 hours TIS, remove the MRB from service.
(2) After the effective date of this AD, do not install a MRB P/ N 3G6210A00131 with a S/N 3615, 3634, 3667, or 3729 on any helicopter.

(f) Alternative Methods of Compliance (AMOCs)

(1) The Manager, Safety Management Section, Rotorcraft Standards Branch, FAA, may approve AMOCs for this AD. Send your proposal to: Matt Fuller, Senior Aviation Safety Engineer, Safety Management Section, Rotorcraft Standards Branch, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone (817) 222-5110; email 9-ASW-FTW-AMOC-Requests@faa.gov.
(2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, we suggest that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office, before operating any aircraft complying with this AD through an AMOC.

(g) Additional Information

The subject of this AD is addressed in European Aviation Safety Agency (EASA) AD No. 2017-0175-E, dated September 13, 2017. You may view the EASA AD on the internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2017-0939.

(h) Subject

Joint Aircraft Service Component (JASC) Code: 6210 Main Rotor Blades.

(i) Material Incorporated by Reference

(1) The Director of the Federal Register approved the incorporation by reference 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 the AD specifies otherwise.
(i) Leonardo Helicopters Emergency Alert Service Bulletin No. 139-508, dated September 12, 2017.
(ii) Reserved.
(3) For Leonardo Helicopters service information identified in this AD, contact Leonardo S.p.A. Helicopters, Matteo Ragazzi, Head of Airworthiness, Viale G.Agusta 520, 21017 C.Costa di Samarate (Va) Italy; telephone +39-0331-711756; fax +39-0331-229046; or at http://www.leonardocompany.com/-/bulletins.
(4) You may view this service information at FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N- 321, Fort Worth, TX 76177. Forinformation on the availability of this material at the FAA, call (817) 222-5110.
(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.

Comments Invited

This AD is a final rule that involves requirements affecting flight safety, and we did not provide you with notice and an opportunity to provide your comments prior to it becoming effective. However, we invite you to participate in this rulemaking by submitting written comments, data, or views. We also invite comments relating to the economic, environmental, energy, or federalism impacts that resulted from adopting this AD. The most helpful comments reference a specific portion of the AD, explain the reason for any recommended change, and include supporting data. To ensure the docket does not contain duplicate comments, commenters should send only one copy of written comments, or if comments are filed electronically, commenters should submit them only one time. We will file in the docket all comments that we receive, as well as a report summarizing each substantive public contact with FAA personnel concerning this rulemaking duringthe comment period. We will consider all the comments we receive and may conduct additional rulemaking based on those comments.

Discussion

EASA, which is the Technical Agent for the Member States of the European Union, has issued AD No. 2017- 0175-E, dated September 13, 2017, to correct an unsafe condition for Leonardo S.p.A. (previously Agusta) Model AB139 and AW139 helicopters. EASA advises of an in-flight loss of an MRB tip cap on an AW139 helicopter where the pilot was able to safely land the helicopter. EASA further advises that an investigation determined the cause as incorrect bonding procedures used during production on MRB part number 3G6210A00131, serial numbers 3615, 3634, 3667, and 3729. According to EASA, this condition could result in loss of an MRB tip cap, increased pilot workload, and reduced control of the helicopter. To address this unsafe condition, the EASA AD requires a one-time inspection of the affected MRB tip caps within 5 hours and replacing the affected MRBs within 10 hours if not replaced as a result of the inspection. The EASA AD also prohibits installing the affected MRBs on a helicopter.
The FAA is in the process of updating Agusta's name change to Leonardo Helicopters on its type certificate. Because this name change is not yet effective, this AD specifies Agusta.

FAA's Determination

These helicopters have been approved by the aviation authority of Italy and are approved for operation in the United States. Pursuant to our bilateral agreement with Italy, EASA, its technical representative, has notified us of the unsafe condition described in the EASA AD. We are issuing this AD because we evaluated all information provided by EASA and determined the unsafe condition exists and is likely to exist or develop on other helicopters of these same type designs.

Related Service Information Under 1 CFR Part 51

Leonardo Helicopters has issued Emergency Alert Service Bulletin No. 139-508, dated September 12, 2017, which describes procedures for inspecting the tip cap for disbonding using a tap test and replacing the main rotor blade.
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.

AD Requirements

For helicopters with an MRB part-number (P/N) 3G6210A00131 that has serial number (S/N) 3615, 3634, 3667, or 3729 installed, this AD requires:
Within 5 hours time-in-service (TIS), tap inspecting each tip cap for disbonding.
If there is any disbonding, this AD requires, before further flight, removing the MRB from service.
If there is no disbonding, this AD requires, within 10 hours TIS, removing the MRB from service.
This AD also prohibits installing these serial-numbered MRBs on any helicopter after the effective date of this AD.

Differences Between This AD and the EASA AD

The EASA AD requires that you return the removed blades to Leonardo Helicopters, and this AD does not.

Costs of Compliance

We estimate that this AD affects four helicopters of U.S. Registry.
At an average labor rate of $85 per work-hour, we estimate that operators may incur the following costs in order to comply with this AD. Tap inspecting the MRB tip caps will require 1 work-hour, for a cost per helicopter of $85. Replacing one MRB will require 4 work- hours, and $141,725 for required parts. Thus, we estimate a total cost of $568,345 per helicopter and $2,273,380 for the U.S. fleet to comply with this AD.
According to Leonardo Helicopters' service information, some of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals. We do not control warranty coverage by Leonardo Helicopters. Accordingly, we have included all costs in our cost estimate.

FAA's Justification and Determination of the Effective Date

An unsafe condition exists that requires the immediate adoption of this AD without providing an opportunity for public comments prior to adoption. The FAA has found that the risk to the flying public justifies waiving notice and comment prior to adoption of this rule because the corrective actions required by this AD must be accomplished within 5 hours TIS.
Therefore, we find good cause that notice and opportunity for prior public

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comment are impracticable. In addition, for the reasons stated above, we find that good cause exists for making this amendment effective in less than 30 days.

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, I certify that this AD:
1. Is not a ``significant regulatory action'' under Executive Order 12866;
2. Is not a ``significant rule'' under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979);
3. Will not affect intrastate aviation in Alaska to the extent that it justifies making a regulatory distinction; 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.
We prepared an economic evaluation of the estimated costs to comply with this AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

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