AD 2004-15-22
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft Corporation Model S-61L | Airworthiness Directives; Sikorsky Aircraft Corporation Model S-61L, S-61N, S-61-NM, and S-61R Helicopters |
Unsafe Condition
Failure of the engine's Number 5 bearing, resulting in erratic movement of the high-speed engine-to-transmission shaft, oil leakage, an in-flight fire, and an emergency landing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a Number 5 bearing chip detector in each engine, install an on-board chip detector annunciation system, and revise the Rotorcraft Flight Manual (RFM) to include procedures for crew response to an on-board chip detector annunciation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 60 days
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Aircraft Corporation Model S-61L, S-61N, S-61-NM, and S-61R helicopters, certificated in any category.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.