Piper ARROW III Service Manual

2F20
TABLE X-I. TROUBLESHOOTING CHART (VACUUM SYSTEM) (cont)
Vacuum correct but pilot Regulator sticky. Clean regulator.
reports erratic indication
of complete loss in flight. Oil in pump due to leaky Replace pump.
engine flange seal or
cleaning fluid blown into
pump while cleaning engine.
Vacuum can only be Leak in system. Repair or replace lines.
maintained at full
throttle on ground. Worn pump. Replace pump.
Stuck regulator. Clean or replace regulator.
AUX ON selected on Circuit breaker open. Reset circuit breaker(s).
ground check and
auxiliary vacuum pump Faulty electric motor. Isolate and check operation.
will not run. Replace pump motor
Faulty contactor. assembly if required.
Loose or broken wire Tighten all wire connections
connections. and terminals.
Check all wire for open
breaks; repair as needed.
AUX ON selected on Leak in vacuum system. Tighten clamps and check
ground check and little hoses. Replace if necessary.
or no vacuum is indicated.
AUX ON annunciator will Restriction in hose lines. Inspect and repair hole lines.
not illuminate. Replace if necessary.
Dirty filter. Replace filter.
Faulty bulb. Replace bulb.
Regulator not adjusted Adjust properly.
properly.
VAC OFF AUX ON Open circuit breaker. Push circuit breaker(s) in.
annunciator switch will
not engage auxiliary Faulty switch. Test switch for operation.
vacuum pump system. Replace if necessary.
Auxiliary vacuum pump Auxiliary vacuum pump Replace auxiliary vacuum
maintains correct pressure is worn out. pump assembly.
on the ground but not at
altitude. Regulator is sticky. Clean or replace regulator.
Trouble Cause Remedy
Revised: 2/13/89
CHEROKEE ARROW III SERVICE MANUAL
INSTRUMENTS

Piper ARROW III Specifications

General

Manufacturer	Piper Aircraft
Model	ARROW III
Engine	Lycoming IO-360-C1C6
Horsepower	200 hp
Maximum Takeoff Weight	2, 750 lb (1, 247 kg)
Seating Capacity	4
Propeller	2-blade, constant speed
Length	24 ft 7 in (7.49 m)