AD 77-05-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369D | Airworthiness Directives; Hughes Model 369D Helicopters |
Unsafe Condition
Binding of the tail rotor control system and damage to the tail rotor output shaft.
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Required Actions
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. Equivalent replacement parts may be used if approved by the Chief, Aircraft Engineering Division, FAA Western Region. Special flight permits may be issued under 21.197 and 21.199 to operate helicopters to a base for installation.
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Compliance Time
Within 30 calendar days from the effective date of this AD
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Affected Aircraft
Hughes Model 369D helicopters, serial numbers 0003 through 0049, manufactured without protective boots on the tail rotor output shaft.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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