(c)
Remove the two quick-release pins from the two brackets on the left APU compartment bulkhead.
(d)
Connect the two hold-open rods from the left access door to the two brackets and install the two quick-release pins.
(e)
Push the right access door up and remove the lanyard from the pin on the aft APU compartment bulkhead.
(f)
Open the right access door to the fully open position and remove the two hold-open rods from the two clips.
(g)
Remove the two quick-release pins from the two brackets on the right APU compartment bulkhead.
(h)
Connect the two hold-open rods from the right access door to the two brackets and install the two quick-release pins.
C.
Igniter Plug Removal
S 024-024
WARNING: DO NOT TOUCH THE IGNITION COMPONENTS UNTIL YOU DO THESE STEPS.
_______ THESE STEPS WILL RELEASE THE HIGH VOLTAGE FROM THE IGNITION EXCITER. IF YOU DO NOT OBEY THIS PROCEDURE, INJURY TO PERSONS CAN OCCUR.
(1)
Do these steps to release the high voltage from the ignition exciter
(2)
and to remove the igniter plug (6):
(a)
Make sure six minutes have gone by since the last APU start.
WARNING: MAKE SURE YOU DISCONNECT THE ELECTRICAL CONNECTOR D95006
_______ (P6) FROM THE IGNITION EXCITER TO RELEASE THE HIGH VOLTAGE. YOU DISCONNECT THE ELECTRICAL CONNECTOR AS A PRECAUTION THAN A MAINTENANCE TASK. INJURY TO PERSONS CAN OCCUR.
(b) Disconnect the electrical connector D95006 (P6) (3) from the ignition exciter (2).
CAUTION: DO NOT LET THE BRAID OR FERRULE OF THE IGNITION CABLE MOVE
_______ WHEN YOU LOOSEN THE TWO COUPLING NUTS. DAMAGE TO THE IGNITION CABLE CAN OCCUR.
(c) Loosen the coupling nut on the ignition cable (1) until you can disconnect the ignition cable from the ignition exciter (2).
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A
747-400
MAINTENANCE MANUAL
FWD SEE A
APU COMPARTMENT
SEE B CABLE 1. IGNITION (2 LOCATIONS) 2. IGNITION EXCITER 3. D95006 (P6) ELECTRICAL CONNECTOR,
FWD
SEE C
A
Igniter Plug Installation Figure 401 (Sheet 1)
L75630
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MAINTENANCE MANUAL
IGNITER PLUG (5 O'CLOCK POSITION)
SEE D
IGNITER PLUG
FWD
(7 O'CLOCK POSITION)
SEE D
B
4.
GASKET
(QTY 2)
5.
SEALING
COVER
6.
IGNITER PLUG
FWD
C
1. IGNITION CABLE
FWD
IGNITER PLUG
D
Igniter Plug Installation Figure 401 (Sheet 2)
L73259
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A
747-400 MAINTENANCE MANUAL
(d) Loosen the coupling nut on the ignition cable (1) until you can disconnect the ignition cable from the igniter plug (6).
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