Piper Navajo PA-31 Service Manual page 447

PIPER NAVAJO SERVICE MANUAL
TABLE VII-I. TROUBLESHOOTING CHART (LANDING GEAR SYSTEM)
Trouble
Cause
Remedy
Landing gear selector
handle fails to oper-
ate to gear up position.
Selector lever cannot
be moved to the gear
up position while the
LEFT main gear strut
is compressed or with
the power off.
Ascertain
that the LEFT
main gear strut is ex-
tended and that the
power is on.
Faulty safety switch on
left main gear.
Adjust or replace
safety
switch.
Gear retracts or ex-
tends before the doors
open.
Priority valve leaks in
power pack.
Solenoid valve stuck in
closed position.
Micro switch on power
pack out of adjustment.
Check priority
valve
cracking pressure.
Turn off power and hand
pump doors open.
Check for bent bracket
or loose mounting or
wire and adjust.
NOTE
With power off, solenoid
valve shuttles to door open
and the doors may be opened without selecting gear up
or down.
Doors come open in
flight.
Doors are rigged too
tight.
Adjust rigging of doors.
Micro switch on power
pack out of adjustment.
Adjust micro switch.
Reissued: 10/12/79
LANDING GEAR AND BRAKE SYSTEM
2G21