TM 1-1510-225-MTF
C21.
Landing gear pump motor operating longer than
14 seconds in the extend mode, but the 2-ampere
circuit breaker does not trip.
a. Downlock switches failing to open and/or the time
delay PCB is faulty.
C22.
Landing gear HYD FLUID LOW light not func-
tioning.
a. Defective lamp.
b. Defective fluid indicator circuit.
C23.
Landing gear circuit breaker trips.
a. Shorted circuit.
C24.
Landing gear warning horn inoperative when
LDG GEAR CONTROL switch is in the up posi-
tion and weight of aircraft is on struts, but oper-
ates when a POWER lever is closed and the gear
is retracted.
a. Poor ground at landing gear control switch.
b. Defective wiring between LDG GEAR CON-
TROL switch and landing gear safety switch.
c. Defective stall/landing gear warning module.
d. Defective speaker.
C25.
Landing gear warning horn inoperative when
POWER lever is closed and landing gear is up.
a. Defective or out of adjustment POWER lever
switch.
b. Defective wiring between POWER lever switches
and pedestal terminal board, and between LDG
GEAR CONTROL switch and stall/landing gear
warning horn module.
c. Defective speaker.
C26.
Landing gear warning horn fails to shut off when
landing gear is extended.
a. Defective or out of adjustment down-lock
switches.
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