Piper Navajo PA-31 Service Manual page 629

PIPER NAVAJO SERVICE MANUAL
TABLE IX-II.
TROUBLESHOOTING CHART (FUEL SYSTEM)
Trouble
Cause
Remedy
Fuel gauge fails to in-
dicate proper tank
level.
NOTE: With current
off, gauges will in-
dicate fuel level as
existed when current
was shut-off or failed.
Circuit breaker out.
Broken wire.
Gauge inoperative.
Tank selector
switch
inoperative.
Reset and check.
Check and repair.
Replace.
Repair or replace.
Incomplete ground.
Float and arm as-
sembly of fuel trans-
mitter(s)
in wing
sticking.
Check ground connec-
tions at fuel transmit-
ters in wings and at
gauge.
Check fuel transmitters
in wings and repair or
replace.
Fuel gauge indicating
approximately
1/2
tank when tank is full
but will function nor-
mally on other tank.
Inboard fuel transmit-
ter assembly grounded.
Float and arm assembly
of fuel transmitter(s)
in
wing sticking.
Check inboard fuel
transmitter
installation
and repair.
Check fueltransmitters
in wings and repair or
replace.
No fuel pressure
in-
dication.
Emergency
shut-off
valve off.
Turn on.
Fuel valve stuck.
No fuel in tanks.
Filters
dirty.
Check valve.
Check fuel, fill.
Clean filters.
FUEL SYSTEM
Reissued: 10/12/79
3C13