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Federal Register / Vol. 86, No. 136 / Tuesday, July 20, 2021 / Rules and Regulations
a Effective Date This airworthiness directive AD is effective August 24, 2021.
b Affected ADs This AD replaces AD 20111852, Amendment 3917020 77 FR 23109, April 18, 2012 AD 20111852.
c Applicability This AD applies to Leonardo S.p.a. type certificate previously held by Agusta S.p.A.
Model AB139 and AW139 helicopters, certificated in any category, with tail rotor T/R blade, part number P/N
3G6410A00131, 3G6410A00132, 3G6410A00133, 4G6410A00131, 4G6410A00132, or 4G6410A00133, installed.
d Subject Joint Aircraft Service Component JASC
Code: 6410, Tail Rotor Blades.
e Unsafe Condition This AD defines the unsafe condition as a crack in a T/R blade. This condition could result in failure of a T/R blade and subsequent loss of control of the helicopter.

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f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 For T/R blade P/Ns 3G6410A00131 and 4G6410A00131, within 5 hours time-inservice TIS after May 3, 2012 the effective date of AD 20111852, establish a life limit of 600 hours TIS or 1,500 takeoff and landing cycles cycles, whichever occurs first, on the affected T/R blades and update the helicopters historical records. If a T/R
blades total number of cycles is unknown, determine the T/R blade cycles by multiplying the T/R blades hours TIS by 4.
2 For T/R blade P/Ns 3G6410A00131 and 4G6410A00131, thereafter following paragraph g1 of this AD, remove any T/R
blade from service before accumulating 600
total hours TIS or 1,500 total cycles, whichever occurs first.
3 For T/R blade P/Ns 3G6410A00132, 3G6410A00133, 4G6410A00132, and 4G6410A00133, within 5 hours TIS after the effective date of this AD, determine the total number of cycles. If a T/R blades total number of cycles is unknown, determine the T/R blade cycles by multiplying the blades hours TIS by 4. Before further flight, remove any T/R blade from service that has accumulated or exceeded its life limit as follows. Thereafter, remove any T/R blade from service before accumulating its life limit as follows:
i T/R blade P/Ns 3G6410A00132 and 4G6410A00132: 1,200 total hours TIS or 3,200 total cycles, whichever occurs first.
ii T/R blade P/N 3G6410A00133: 40,000
total cycles.
iii T/R blade P/N 4G6410A00133: 4,033
total hours TIS or 40,000 cycles, whichever occurs first.
Note 1 to paragraph g3: A combination of T/R blades having different P/Ns can be installed on the same helicopter. The eligible combinations of T/R blades P/N are listed in
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AgustaWestland Mandatory Bollettino Tecnico No. 139265, Revision B, dated February 18, 2014 BT No. 139265.
4 For T/R blade P/Ns 3G6410A00131 and P/N 4G6410A00131, within 25 hours TIS
after the effective date of this AD, and thereafter at intervals not to exceed 25 hours TIS, visually inspect the T/R blade for a crack and damage that exceeds allowable limits.
Inspect in the area depicted in Figure 1 of BT
No. 139265 using a mirror, a 5X or higher power magnifying glass, and a flashlight, or borescope. If there is a crack or damage that exceeds allowable limits, before further flight, remove the T/R blade from service.
5 As of the effective date of this AD, do not install on any helicopter any T/R blade P/N 3G6410A00131 or P/N 4G6410A00131, unless the actions required by paragraphs g1, 2, and 4 of this AD have been accomplished.
h Alternative Methods of Compliance AMOCs 1 The Manager, International Validation 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 or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the International Validation Branch, send it to the attention of the person identified in paragraph i1 of this AD.
Information may be emailed to: 9-AVS-AIR730-AMOC@faa.gov.
2 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.
i Related Information 1 For more information about this AD, contact Matt Fuller, AD Program Manager, General Aviation & Rotorcraft Unit, Airworthiness Products Section, Operational Safety Branch, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone 817 222
5110; email matthew.fuller@faa.gov.
2 The subject of this AD is addressed in European Aviation Safety Agency now European Union Aviation Safety Agency EASA AD 20120076R2, dated February 20, 2014. You may view the EASA AD at https
www.regulations.gov in Docket No. FAA
20210348.
j 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. 552a 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 AgustaWestland Mandatory Bollettino Tecnico No. 139265, Revision B, dated February 18, 2014.
ii Reserved 3 For service information identified in this AD, contact Leonardo S.p.A. Helicopters, Emanuele Bufano, Head of Airworthiness, Viale G.Agusta 520, 21017 C. Costa di Samarate Va Italy; telephone +390331

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225074; fax +390331229046; or at https
www.leonardocompany.com/en/home.
4 You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 817 2225110.
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, email: fedreg.legal@nara.gov, or go to:
https www.archives.gov/federal-register/cfr/
ibr-locations.html.
Issued on July 2, 2021.
Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202115303 Filed 71921; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210175; Project Identifier 2001SW33AD; Amendment 39
21643; AD 20211416
RIN 2120AA64

Airworthiness Directives; Airbus Helicopters Type Certificate Previously Held by Eurocopter France Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for all Airbus Helicopters type certificate previously held by Eurocopter France Model SA365N, SA365N1, AS
365N2, AS 365 N3, and SA366G1
helicopters. This AD was prompted by a quality control check that revealed some stretcher attachment holes were improperly located on the frame where there was insufficient edge distance.
This AD requires measuring the 9degree frame flange frame for the correct edge distance of the four attachment holes for the stretcher support and inspecting for cracks, and repairing the frame, if necessary, and installation of a reinforcement plate reinforcing angle, as specified in two Direction Generale de lAviation Civile DGAC ADs, which are incorporated by reference. The FAA is issuing this AD
to address the unsafe condition on these products.
DATES: This AD is effective August 24, 2021.
SUMMARY:

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