AD 2020-15-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft Corporation | Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters |
Unsafe Condition
inaccurate main gear box (MGB) indications in flight, resulting in multiple erroneous values/annunciations on channel B, which could cause the flight crew to land immediately, and consequent possible loss of the helicopter, injury, or fatality.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
update the remote data acquisition unit (RDAU) software and re-identify the RDAU and, for certain helicopters, update the software of the display unit (DU) and re-identify the DU.
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Compliance Time
Within 500 hours time-in-service
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Affected Aircraft
Sikorsky Aircraft Corporation Model S-76C helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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