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Federal Register / Vol. 86, No. 36 / Thursday, February 25, 2021 / Rules and Regulations
torque of the T/R plug by increasing the torque up to 30.5 Nm and inspect for any movement the moment torque is applied.
i If there is no movement and the tightening torque is at least 30.5 Nm, before further flight, install lockwire by following the Accomplishment Instructions, part I, paragraph 4, of Leonardo Helicopters Emergency Alert Service Bulletin EASB No.
119105, Revision A, dated June 3, 2020
EASB 119105 Rev A.
ii If there is any movement or the tightening torque is less than 30.5 Nm, before further flight, comply with paragraph f2 of this AD.
2 Within 50 hours TIS, unless required before further flight by paragraph f1ii of this AD, and thereafter at intervals not to exceed 200 hours TIS, inspect to determine whether the P/N and serial number S/N are visible on the outboard and inboard faces of the T/R duplex bearing by following the Accomplishment Instructions, part II, paragraphs 4 through 13 except paragraphs 9.1, 13.1, and 13.2, of EASB 119105 Rev A.
Instead of the excluded steps, do the following:
Note 1 to paragraph f2: You are not required to discard parts and you may use equivalent tooling to that identified in EASB
119105 Rev A.
i If the P/N and S/N markings are visible on the outboard or inboard face of the T/R
duplex bearing, before further flight, remove from service the T/R duplex bearing, internal spacer P/N 129016043101 internal spacer, external spacer P/N 129016044
101 external spacer, bearing liner assembly, and T/R control rod P/N 109013502101
T/R control rod.
ii If the P/N and S/N markings are not visible on the inboard face of the T/R duplex bearing, before further flight, inspect the T/
R duplex bearing, T/R plug, and nut by following the Accomplishment Instructions, part II, paragraphs 14 and 15 but not paragraphs 15.1 through 15.2, of EASB 119
105 Rev A. For purposes of this inspection, damage to the races may be indicated by nonmovement of the inner race, movement of the outer race, deformation, roughness, or incorrect installation; and damage to the threads of the T/R plug and nut may be indicated by uneven threads, missing threads, or cross-threading.
A If the T/R duplex bearing has any rough rotation, brinelling, spalling, chipping, flaking, evidence of overheated bearing balls, or damage to the races, before further flight, remove from service the T/R duplex bearing, the internal spacer, the external spacer, the bearing liner assembly, and the T/R control rod.
B If the T/R plug or nut has any damaged threads, before further flight, remove from service the affected part.
C Reassemble the T/R duplex bearing assembly by following the Accomplishment Instructions, part II, paragraphs 16 through 31, of EASB 119105 Rev A.
3 As of the effective date of this AD, do not install a T/R duplex bearing P/N 129
016011103 on any helicopter unless you have complied with the requirements in paragraph f2 of this AD.

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g Credit for Previous Actions 1 Accomplishment of AD 20201302
before the effective date of this AD is considered acceptable for compliance with paragraph f1 and the initial inspection required by paragraph f2 of this AD.
2 Actions accomplished before the effective date of this AD in accordance with the procedures specified in Leonardo Helicopters EASB No. 119100, dated August 7, 2019, or Leonardo Helicopters EASB No.
119105, dated May 18, 2020, are considered acceptable for compliance with the corresponding actions specified in paragraph f1 and the initial inspection required by paragraph f2 of this AD.
h Special Flight Permits Special flight permits are prohibited.
i Alternative Methods of Compliance AMOCs 1 The Manager, Strategic Policy Rotorcraft Section, FAA, may approve AMOCs for this AD. Send your proposal to:
David Hatfield, Aviation Safety Engineer, Aircraft Systems Section, Technical Innovation Policy Branch, FAA, 10101
Hillwood Pkwy., Fort Worth, TX 76177;
telephone 8172225110; email 9-ASW-FTWAMOC-Requests@faa.gov.
2 For operations conducted under a 14
CFR part 119 operating certificate or under 14 CFR part 91, subpart K, the FAA suggests 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.
j Additional Information 1 Leonardo Helicopters EASB No. 119
100, dated August 7, 2019, and Leonardo Helicopters EASB No. 119105, dated May 18, 2020, which are not incorporated by reference, contain additional information about the subject of this AD. For service information identified in this AD, contact Emanuele Bufano, Head of Airworthiness, Viale G.Agusta 520, 21017 C.Costa di Samarate Va Italy; telephone +390331
225074; fax +390331229046; or at https
www.leonardocompany.com/en/home. You may view a copy of the service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX 76177.
2 The subject of this AD is addressed in European Union Aviation Safety Agency EASA AD No. 20200128, dated June 4, 2020. You may view the EASA AD on the internet at https www.regulations.gov in Docket No. FAA20201026.
k Subject Joint Aircraft Service Component JASC
Code: 6400, Tail Rotor System.
l 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.

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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. 119105, Revision A, dated June 3, 2020.
ii Reserved 3 For service information identified in this AD, Leonardo S.p.A. Helicopters, Emanuele Bufano, Head of Airworthiness, Viale G. Agusta 520, 21017 C. Costa di Samarate Va Italy; telephone +390331
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 8172225110.
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/ibrlocations.html.
Issued on January 29, 2021.
Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202103663 Filed 22421; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20200649; Product Identifier 2019SW061AD; Amendment 3921410; AD 20210307
RIN 2120AA64

Airworthiness Directives; Leonardo S.p.a. Helicopters Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for certain Leonardo S.p.a. Leonardo Model AB139 and AW139 helicopters. This AD
requires removing certain engine mounting rods from service and prohibits their installation on any helicopter. This AD was prompted by a report of non-conforming engine mounting rods. The actions of this AD
are intended to address an unsafe condition on these products.
DATES: This AD is effective April 1, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain document listed in this AD
as of April 1, 2021.
SUMMARY:

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