AD 2015-11-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | S-92A | Airworthiness Directives; Sikorsky Aircraft Corporation (Sikorsky) Model Helicopters |
Unsafe Condition
Failure of the main gearbox (MGB) due to oil loss, which could lead to loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a main gearbox (MGB) failed pump sensor and vacuum switch wiring, install an MGB oil auto bypass system, activate Aircraft Management System (AMS) 7.1 software to show a new visual warning, install updated enhanced ground proximity warning system (EGPWS) software with an aural annunciation for complete oil pressure loss, and insert a Rotorcraft Flight Manual (RFM) Supplement into the applicable RFM.
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Compliance Time
Within 500 hours time-in-service
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Affected Aircraft
Sikorsky Model S-92A helicopters, specific serial numbers as outlined in the referenced service information.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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