AD 2019-19-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft Corporation | Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters |
Unsafe Condition
The engine collective position transducer (CPT) may not provide accurate information, which could lead to an unreliable airspeed indication and loss of control of the helicopter.
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Required Actions
Inspect the CPT by measuring resistance, linearity resistance movement, and differential voltage. Depending on the outcome of the inspection, replace the CPT. Operators may use Maintenance Manual, SA 4047-76C-2, Temporary Revision 73-10, dated June 25, 2019, for the corrective actions.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
Sikorsky Model S-76C helicopters with a Turbomeca, S.A., Arriel 2S1 or Arriel 2S2 engine with an engine CPT part number (P/N) 76900-01821-104 or 76900-01821-105 installed.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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