AD 72-16-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369A | Airworthiness Directives; Hughes Model 369A and 369H Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369H | Airworthiness Directives; Hughes Model 369A and 369H Series Helicopters |
Unsafe Condition
Failure of the tail rotor input gearshaft assembly due to finite life limits (1,800 hours) for part numbers 369A5406 (input only), 369A5425, and -3, and 27,600 hours for P/N 369A5425-5.
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Required Actions
Revise helicopter logbook entries per Hughes Service Information Notice No. HN-53 Part I and retire/replace input gearshaft assemblies per Part II of the same notice. Compliance must be completed prior to further flight or within 100 additional hours of time in service, depending on current time in service.
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Compliance Time
Prior to further flight if the gearshaft has 2,000 hours or more time in service, or within 100 additional time in service if between 1,800 and 2,000 hours, adjusted to prevent exceeding 2,000 hours.
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Affected Aircraft
MD Helicopters, Inc. Models 369A and 369H Series Helicopters with tail rotor input gearshaft assemblies (P/N 369A5406, 369A5425, -3, or -5).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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