THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 1
Jun 1/03
2H7
24-40-00
EXTERNAL POWER
1. Description
The external power receptacle is located near the battery on the right side aft fuselage, aft of the rear
baggage compartment door.
2. Operation
Proceed as follows when using external power for engine start or operation of any of the airplane’s
equipment:
A. Turn the master switch OFF.
B. Turn all electrical equipment OFF.
C. Insert plug of a standard 28Vdc power source into the external power socket in the fuselage. Note
that, after inserting plug, the electrical system is ON.
D. Proceed with the normal engine starting technique.
NOTE: Starter manufacturers recommend limiting cranking to thirty second periods with a two
minute rest between periods. Lengthy cranking will shorten the starter’s life.
E. After engine start:
(1) Reduce power to the lowest possible rpm to reduce sparking when disconnecting jumper
cable.
(2) Disconnect the jumper cable from the aircraft.
(3) Turn the master switch ON and check the alternator ammeter. DO NOT ATTEMPT FLIGHT IF
THERE IS NO INDICATION OF ALTERNATOR OUTPUT. If aircraft battery is weak, charging
current will be high. DO NOT TAKE OFF until charging current falls below 20 amps.
NOTE: For all normal operations using jumper cables, the master switch should be OFF. The
aircraft battery can be used in parallel with the external battery by turning the master
switch ON. This will give longer cranking capabilities, but will not increase the
amperage. Exercise care, because if the aircraft battery has been depleted, the
external power supply can be drawn down to the level of the aircraft battery. This can
be tested by turning the master switch ON momentarily while the starter is engaged. If
cranking speed increases, the aircraft battery is at a higher level than the external
power supply.
(4) When the engine is firing evenly, advance throttle to 800 RPM. If oil pressure is not indicated
within thirty seconds, stop engine and determine trouble. It will take a few seconds longer in
cold weather to get an oil pressure indication. If the engine fails to start, refer to the Lycoming
Operating Handbook: Engine Troubles and Their Remedies.
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