AD/JBK 117/21 Amdt 1 - Rescue Winch Operation
RESCUE WINCH MAIN SWITCH OFF.RESCUE WINCH MAIN SWITCH OFF.
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Annex A
UNCONTROLLABLE WINCH PROCEDURES
BK117 Helicopters Serial Numbers 1001 through 1024 except 1009
When up or down operation of the winch becomes uncontrollable, interrupt the supply of power to the motor and stop the winch operation in accordance with the following procedure:
The cable operation cannot be controlled.
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RESCUE WINCH Switch ————————————— OFF 2. BUS TIE Switch ————————————————— OFF 3. PWR SEL Switch ———————————————— OFF
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GENERATOR I Switch —————————————— OFF
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Cut any unnecessary load if the load of the generator exceed 150 Amps.
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Land as soon as possible.
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Disconnect the Rescue Winch electrical connector, then re-supply power.
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Note:
The power supply to the winch motor cannot be interrupted by the WINCH CONT circuit breaker or