AD 2012-15-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft Corporation | Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters |
Unsafe Condition
An overheated electric rotor brake (ERB), which could result in ignition of hydraulic fluid, fire in the main gearbox area, and subsequent loss of control of the helicopter.
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Required Actions
Within 120 days, modify the ERB by installing and operationally testing parts from three kits: P/N 76070-55023-011, P/N 76070-55033-012, and P/N 76070-55207-011. After modification, insert changes into the 'Normal Procedures' and 'Emergency Procedures' sections of the Rotorcraft Flight Manual (RFM) as specified in RFM Supplement No. 41.
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Compliance Time
Within 120 days
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Affected Aircraft
Sikorsky Aircraft Corporation Model S-76A helicopters with electric rotor brake (ERB), part number P/N 76363-09100-012, installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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