AD Amdt-39-11102
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft-manufactured Model CH-54A | Airworthiness Directives; Sikorsky Aircraft-manufactured Model CH-54A Helicopters |
Unsafe Condition
Cracked second stage lower planetary plate (plate) due to fatigue cracking, which could lead to main gearbox failure, drive system failure, and loss of control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and rework or replace the second stage lower planetary plate as necessary. Perform initial and recurring inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Not specified in the provided text.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Aircraft-manufactured Model CH-54A 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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