Rotorcraft Tail Boom Airworthiness Directive

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[Federal Register Volume 86, Number 140 (Monday, July 26, 2021)]

[Rules and Regulations]

[Pages 39942-39949]

From the Federal Register Online via the Government Publishing Office []

[FR Doc No: 2021-15721]



Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2019-0759; Product Identifier 2018-SW-075-AD; Amendment 39-21661; AD


RIN 2120-AA64

Airworthiness Directives; Various Restricted Category Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.


SUMMARY: The FAA is adopting a new airworthiness directive (AD) for various restricted

category helicopters, originally manufactured by Bell Textron Inc. (Bell). This AD was prompted by

multiple events involving failure of the tail boom attach structure including the bolts. This AD

requires revising the existing Rotorcraft Flight Manual (RFM) for your helicopter to incorporate pre-

flight checks; removing paint and sealant, and cleaning; repetitive inspections of structural

components that attach the tail boom to the fuselage; and depending on the outcome of the

inspections, repairing or replacing components, or re-bonding the structure. The FAA is issuing this

AD to address the unsafe condition on these products.

DATES: This AD is effective August 30, 2021.

ADDRESSES: For service information identified in this final rule, contact: U.S. Army Materiel

Command Logistics Data Analysis Center (USAMC LDAC), ATTN: Equipment Publication Control

Officers (EPCOs), Building 3305, Redeye Road, Redstone Arsenal, AL 35898-7466; phone (256)

955-7716 or 1-866-211-3367; email; or at

You may also contact the following, as applicable:

JJASPP Engineering Services, LLC, 511 Harmon Terrace, Arlington, TX 76010; phone: (817)

465-4495; website:

Northwest Rotorcraft, LLC, 1000 85th Ave. SE, Olympia, WA 98501; phone: (360) 754-7200;


Overseas Aircraft Support, Inc., P.O. Box 898, Lakeside, AZ 85929; phone (928) 368-6965; fax

(928) 368-6962.

Richards Heavylift Helo, Inc., 1181 Osprey Nest Point, Orange Park, FL 32073.

Rotorcraft Development Corporation, P.O. Box 430, Corvallis, MT 59828; phone: (207) 329-