AD 2016-24-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Various | Airworthiness Directives; Sikorsky Aircraft Corporation |
Unsafe Condition
Binding in the TR pitch change shaft (TRPCS) assembly double row angular contact bearing, which can result in reduced tail rotor (TR) control and possible loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service TRPCS assemblies with less than 5 hours time-in-service (TIS) since new or overhaul. For TRPCS assemblies with 5 or more hours TIS, borescope inspect the TRPCS bearing for damaged, incorrectly installed, or missing seals, and inspect the angular contact bearing for free rotation, purged grease with metallic particles, and damaged seals. Replace the TRPCS assembly if any discrepancies are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight for TRPCS assemblies with less than 5 hours TIS; within 20 hours TIS for TRPCS assemblies with 5 or more hours TIS.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Aircraft Corporation Model S-92A helicopters with TR pitch change shaft (TRPCS) assembly part number (P/N) 92358-06303-041 or P/N 92358-06303-042, with less than 80 hours time-in-service (TIS) installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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