AD Amdt-39-10028
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft-Manufactured Model S- 64F | Airworthiness Directives; Sikorsky Aircraft-Manufactured Model S- 64F Helicopters |
Unsafe Condition
Cracks in the main gearbox second stage lower planetary plate due to fatigue cracking could lead to main gearbox failure and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and replace, if necessary, the main gearbox second stage lower planetary plate.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Aircraft-manufactured Model S-64F helicopters
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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