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Federal Register / Vol. 86, No. 231 / Monday, December 6, 2021 / Rules and Regulations
2 Will not affect intrastate aviation in Alaska, and 3 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 Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

20212211 MD Helicopters Inc. MDHI:
Amendment 3921784; Docket No.
FAA20210653; Project Identifier AD
202100170R.
a Effective Date This airworthiness directive AD is effective January 10, 2022.

h Credit for Previous Actions You may take credit for the instance of the actions required by paragraphs g1i or ii of this AD if you performed corresponding actions before the effective date of this AD
using MD Helicopters Service Bulletin SB369H263, SB369D229, SB369E129, SB369F119, SB500N066, or SB600N080, each dated January 30, 2020, as applicable to your model helicopter, or MD Helicopters Service Bulletin SB369H263R1, SB369D
229R1, SB369E129R1, SB369F119R1, SB500N066R1, or SB600N080R1, each dated May, 15 2020, as applicable to your model helicopter.

b Affected ADs None.
c Applicability This AD applies to MD Helicopters Inc.
MDHI Model 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters, certificated in any category, with pilot-to-copilot tail rotor torque tube torque tube part number 369H75319/-11/-13, installed.
d Subject Joint Aircraft Service Component JASC
Code: 6720, Tail Rotor Control System.

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e Unsafe Condition This AD was prompted by a report of a spiral crack in the torque tube. The FAA is issuing this AD to prevent failure of a torque tube. The unsafe condition, if not addressed, could result in loss of tail rotor control and subsequent loss of control of the helicopter.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 Using a flashlight and mirror, visually inspect the exterior of the torque tube at the interface of the torque tube and bushing segments, and borescope inspect the interior of the torque tube at the interface of the
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torque tube and bushing segments for a crack, elongation, and other damage, which may be indicated by any corrosion, pitting, crazing, dents, dings, displacement of material at the bolt hole edge, or fretting of the hole by following the Accomplishment Instructions, paragraphs 2.A.1. through 3.a., of MD
Helicopters Service Bulletin SB369H263R2, SB369D229R2, SB369E129R2, SB369F
119R2, SB500N066R2, or SB600N080R2, each dated March 24, 2021, as applicable to your model helicopter, as follows:
Note 1 to the introductory text of paragraph g1: Scaling of the inner diameter primer or paint may be an indication of a crack.
i For helicopters that have accumulated 600 or less total hours time-in-service TIS, within 100 hours TIS after the effective date of this AD.
ii For helicopters that have accumulated more than 600 total hours TIS, within 5
hours TIS or 30 days after the effective date of this AD, whichever occurs later. Note 2 to paragraph g1ii: It is advised to limit flights with increased, excessive, or rapid pedal movements before the first instance of the actions required by paragraph g1ii of this AD are accomplished.
iii If there is a crack, elongation, or other damage, before further flight, remove the torque tube from service.
2 Thereafter following paragraph g1 of this AD, at intervals not to exceed 300 hours TIS, borescope inspect the interior of the torque tube at the interface of the torque tube and bushing segments as required by paragraph g1 of this AD. If there is a crack, elongation, or other damage, before further flight, remove the torque tube from service.

i Alternative Methods of Compliance AMOCs 1 The Manager, Los Angeles ACO, 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 certification office, information may be emailed to: 9ANM-LAACO-AMOC-REQUESTS@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.
j Related Information 1 For more information about this AD, contact Payman Soltani, Aerospace Engineer,
PO 00000

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Airframe Section, Los Angeles ACO Branch, Compliance & Airworthiness Division, FAA, 3960 Paramount Blvd., Lakewood, CA 90712;
telephone 562 6275313; email payman.soltani@faa.gov.
2 MD Helicopters Service Bulletin SB369H263, SB369D229, SB369E129, SB369F119, SB500N066, and SB600N
080, each dated January 30, 2020 copublished as one document and collectively referred to as initial issuance, and MD
Helicopters Service Bulletin SB369H263R1, SB369D229R1, SB369E129R1, SB369F
119R1, SB500N066R1, and SB600N080R1, each dated May, 15, 2020 co-published as one document and collectively referred to as Revision 1, which are not incorporated by reference, contain additional information about the subject of this AD. This service information is available at the contact information specified in paragraphs k3
and 4 of this AD.
k 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 MD Helicopters Service Bulletin SB369D229R2, dated March 24, 2021.
ii MD Helicopters Service Bulletin SB369E129R2, dated March 24, 2021.
iii MD Helicopters Service Bulletin SB369F119R2, dated March 24, 2021.
iv MD Helicopters Service Bulletin SB369H263R2, dated March 24, 2021.
v MD Helicopters Service Bulletin SB500N066R2, dated March 24, 2021.
vi MD Helicopters Service Bulletin SB600N080R2, dated March 24, 2021.
Note 3 to paragraph k2: The service bulletins listed in paragraphs k2i through vi of this AD are co-published as one document.
3 For MD Helicopters service information identified in this AD, contact MD
Helicopters, Inc., Attn: Customer Support Division, 4555 E. McDowell Rd., Mail Stop M615, Mesa, AZ 852159734; telephone 800 3883378; fax 480 3466813; or at https www.mdhelicopters.com.
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: fr.inspection@nara.gov, or go to:
https www.archives.gov/federal-register/cfr/
ibr-locations.html.
Issued on October 14, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202126332 Filed 12321; 8:45 am BILLING CODE 491013P

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