Landing gear circuit breaker trips.
Grounded control circuit.
Grounded motor circuit.
Mechanical defect in gear causing overload.
Landing gear operation noisy.
Broken gear door linkage.
Worn actuator bearings.
Landing gear warning horn inoperative.
Horn circuit breaker tripped.
Open or grounded circuit.
Throttle switch defective or out of adjustment.
Main or nose gear down lock warning switch defective or out of adjustment.
Defective warning horn module.
Landing gear warning horn inoperative when landing gear control switch is in the up position
and weight of aircraft is on struts, but operates when a power lever is closed and the gear is
Defective landing gear control switch.
Defective wiring to landing gear control switch.
Landing gear warning horn inoperative when power lever is closed and landing gear is up.
Circuit breaker tripped.
Defective or out of adjustment power lever switch.
Defective wiring between power lever switches and pedestal terminal board, and between landing
gear control switch and warning horn module.