AD 2017-22-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft Corporation | Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters |
Unsafe Condition
Decoupling of the flight director (FD) in all three axes when transitioning between SAR AFCS modes, specifically from SAR Approach 2 (APP2) to Velocity Hover Hold (VHLD) mode, resulting in a three-second delay before annunciation and potential loss of control or flight into terrain.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the Operating Limitations section of Sikorsky SA S92A-RFM-003 RFMS No. 4 to prohibit engaging VHLD via MSP soft key during coupled SAR APP2 mode, add a warning about the decoupling event and subsequent behavior, and include a note on correctly activating VHLD mode.
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Compliance Time
Within 10 hours time-in-service
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Affected Aircraft
Sikorsky Aircraft Corporation Model S-92A helicopters with Flight Control Computer (FCC) part number 92900-01802-112 installed.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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