Piper Navajo PA-31 Service Manual page 449

PIPER NAVAJO SERVICE MANUAL
TABLE VII-I. TROUBLESHOOTING CHART (LANDING GEAR SYSTEM) (cont)
Trouble
Cause
Remedy
No green light on
panel when gear
are down.
Circuit breaker out.
Indicator light burned
out.
Check circuit breaker.
Replace indicator light
Lock switch defective
or out of adjustment.
Gear not locked in
down position.
Replace and/or adjust
lock switch.
Adjust the gear.
Flashing red indica-
tor light or warn-
ing horn sounding
when power from
one or both en-
gines is above 15
inches of manifold
pressure.
Red indicator light
stays on with gear
up and locked.
Throttle switches are
faulty.
Throttle switches out
of adjustment
Doors could be open.
Switch defective.
Replaces switches.
Adjust throttle switches.
Adjust doors.
Replace defective
switch.
Right throttle/gear
warning switch wire
chafing on throttle
linkage.
Check wiring.
Flashing red light and
warning horn fail to
operate when power
from both engines is
reduced below 14 or
15 inches manifold
pressure.
Throttle switches out
of adjustment
Throttle switches are
defective.
Horn or light defec-
tive.
Adjust throttle switches.
Replace switch.
Replace defective part
Defective wiring.
Check wiring.
Reissued: 10/12/79
LANDING GEAR AND BRAKE SYSTEM
2G23