AD 2012-14-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft Corporation | Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters |
Unsafe Condition
A crack in the cored passage of the main gearbox (MGB) housing, adjacent to the scissor bracket mount, may allow oil leakage, leading to loss of oil, MGB 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 the main gearbox (MGB) housing with a 10X magnifying glass for cracks. If a crack is found or oil leakage is detected, replace the MGB with an airworthy one. Optionally, perform a one-time eddy-current inspection of the MGB main module assembly as a terminating action.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 hours time-in-service, and repeated daily.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Aircraft Corporation Model S-92A 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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