Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 227 / 881

AMMETER.
The ammeter is mounted in the instrument panel. This instrument measures the output of the alternator into
the entire electrical system including the battery charging demand.
EXTERNAL POWER.
EXTERNAL POWER RECEPTACLE.
The external power receptacle is located on the right side of the nose section. When using external power for
operation of any of the airplane's equipment, the master switch must be ON. To start the engine with external
power proceed as follows:
— CAUTION —
EXTERNAL POWER IS SUPPLIED DIRECTLY TO THE ELECTRICAL
BUS. TURN OFF ALL ELECTRICAL EQUIPMENT BEFORE APPLY I N G
OR REMOVING EXTERNAL POWER.
1. Turn aircraft MASTER SWITCH and all electrical equipment OFF.
2. Connect the RED lead of PEP (Piper External Power) kit jumper cable to the POSITIVE (+) terminal of
external 12 volt battery and the BLACK lead goes to the NEGATIVE (-) terminal.
3. Insert the plug of the jumper cable into the socket located on the aircraft fuselage.
4. Leave MASTER SWITCH OFF and proceed with engine starting technique as follows:
A. Start engines with the standard technique but after starting both engines reduce power on the left
engine to the lowest possible RPM to reduce sparking. and shut down the right engine.
5. Turn all electrical equipment OFF and remove the jumper cable plug from the aircraft.
6. Turn the aircraft MASTER SWITCH to the ON position and check the alternator ammeter for an
indication of output. Do not attempt any flight if there is no indication of alternator output.
— Note —
For all normal operations using the PEP jumper cables, the master switch should be
OFF, but it is possible to use the ship 's battery in parallel by turning the master switch
ON. This will give longer cranking capabilities, but will not increase the amperage.
— CAUTION —
CARE SHOULD BE EXERCISED BECAUSE IF THE SHIP’S BATTERY HAS
BEEN DEPLETED, THE EXTERNAL POWER SUPPLY CAN BE REDUCED
TO THE LEVEL OF THE SHIP’S BAT T E RY. THIS CAN BE TESTED BY
TURNING THE MASTER SWITCH ON MOMENTA R I LY WHILE THE
STARTER IS ENGAGED. IF CRANKING SPEED INCREASES, THE SHIP’S
B AT T E RY & AT A HIGHER LEVEL THAN THE EXTERNAL POWER
S U P P LY. IF THE BAT T E RY HAS BEEN DEPLETED BY EXCESSIVE
CRANKING IT MUST BE RECHARGED BEFORE THE SECOND ENGINE
IS STA RTED. ALL THE ALT E R N ATOR CURRENT WILL GO TO THE
LOW BAT T E RY UNTIL IT RECEIVES SUFFICIENT CHARGE, AND IT
MAY NOT START THE OTHER ENGINE IMMEDIATELY.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2 4 - 4 1 - 0 0
Page 24-23
Revised: May 15, 1989
1J11
PIPER AIRCRAFT