# AD 77-05-03: Tail Rotor Control System

- Type: Airworthiness directive
- Status: Current
- Products: MD Helicopters 369D
- Effective: March 7, 1977
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-2845
- Registered aircraft: 211 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1E6C536D5FB61BD186256A39004E5998.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/77-05-03

## The airworthiness directive

77-05-03 HUGHES HELICOPTERS: Amendment 39-2845. Applies to Hughes Model 369D helicopters Serial No. 0003 through 0049, certificated in all categories, that were manufactured without protective boots on the tail rotor output shaft.

Compliance required as indicated unless already accomplished.

To prevent binding of the tail rotor control system and damage to the tail rotor output shaft, accomplish the following:

  (a) Within 30 calender days from the effective date of this AD, disassemble the tail rotor control assembly, install Hughes P/N 369D21806 rotating boot and Hughes P/N 369D21807 stationary boot, and reassemble in accordance with Hughes Handbook of Maintenance Instruction.

  (b) Equivalent replacement parts may be used when approved by the Chief, Aircraft Engineering Division, FAA Western Region.

  (c) Special flight permits may be issued in accordance with 21.197 and 21.199 to operate helicopters to a base for the accomplishment of the installation requiredby this AD.

This amendment becomes effective March 7, 1977.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H3WE](https://openairdocs.org/tcds/H3WE): MD Helicopters LLC; names 1 of 12 models: 369D

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 211 (211 by airframe model, 0 by engine model)
- Makers: Hughes Helicopters 207, Summa 4

Models with the most aircraft:

- [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d): 207 aircraft (airframe model)
- [Summa 369D](https://openairdocs.org/model/summa-369d): 4 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/77-05-03/models.md
Every aircraft: https://openairdocs.org/ad/77-05-03/aircraft.md

Its text cites no advisory circulars or STCs.

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