# AD 75-22-03: Tail Rotor Drive Shaft

- Type: Airworthiness directive
- Status: Current
- Products: MD Helicopters 369, 369A, 369H, 369HE, 369HM and 369HS
- Effective: October 24, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-2387
- Registered aircraft: 130 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/66436CCF338F5CCC86256A39004D7859.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-22-03

## The airworthiness directive

75-22-03 HUGHES HELICOPTERS: Amendment 39-2387. Applies to all Hughes Model 369, 369A, 369H, 369HS, 369HE, 369HM, certificated in all categories and military OH- 6A and YOH-6A helicopters incorporating metal tail rotor blades Part Number 369A1613, or -3, in combination with tail rotor drive shaft, Part Number 369A5518.

Compliance required within the next 50 hours time in service, after the effective date of this AD unless already accomplished.

  (a) To prevent possible emergency flight situations resulting from failure of the tail rotor drive shaft, replace drive shaft P/N 369A5518 with drive shaft P/N 369A5518-601 in accordance with Part I, B.3. of Hughes Service Information Notice No. HN-86, dated April 28, 1975, or later FAA-approved revisions.

  (b) Aircraft may be flown in accordance with FAR 21.197 to a base for the performance of the maintenance described herein.

  (c) Equivalent modification procedures may be approved by the Chief, Aircraft Engineering Division, FAA Western Region.

NOTE: Assure that the record to reflect compliance with this AD is made in aircraft records in accordance with FAR's 91.165 and 91.173.

This amendment becomes effective October 24, 1975.

## 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 6 of 12 models: 369HS, 369HM, 369HE, 369H, 369 (Army YOH-6A), 369A (Army OH-6A)

## 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: 130 (130 by airframe model, 0 by engine model)
- Makers: Hughes 121, MD Helicopters 6, Hughes/Batto John 1, Hughes/Helicopter Assocs 1, Summa 1

Models with the most aircraft:

- [Hughes 369HS](https://openairdocs.org/model/hughes-369hs): 69 aircraft (airframe model)
- [Hughes 369A](https://openairdocs.org/model/hughes-369a): 32 aircraft (airframe model)
- [Hughes 369A (OH-6A)](https://openairdocs.org/model/hughes-369a-oh-6a): 11 aircraft (airframe model)
- [Hughes 369](https://openairdocs.org/model/hughes-369): 5 aircraft (airframe model)
- [MD Helicopters 369HS](https://openairdocs.org/model/md-helicopters-369hs): 3 aircraft (airframe model)
- [Hughes 369HE](https://openairdocs.org/model/hughes-369he): 3 aircraft (airframe model)
- [MD Helicopters 369HM](https://openairdocs.org/model/md-helicopters-369hm): 2 aircraft (airframe model)
- [Summa 369HS](https://openairdocs.org/model/summa-369hs): 1 aircraft (airframe model)
- [MD Helicopters 369A](https://openairdocs.org/model/md-helicopters-369a): 1 aircraft (airframe model)
- [Hughes/Helicopter Assocs 369A](https://openairdocs.org/model/hughes-helicopter-assocs-369a): 1 aircraft (airframe model)
- [Hughes/Batto John 369A (OH-6A)](https://openairdocs.org/model/hughes-batto-john-369a-oh-6a): 1 aircraft (airframe model)
- [Hughes 369H](https://openairdocs.org/model/hughes-369h): 1 aircraft (airframe model)

All 12 models: https://openairdocs.org/ad/75-22-03/models.md
Every aircraft: https://openairdocs.org/ad/75-22-03/aircraft.md

Its text cites no advisory circulars or STCs.

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