(b)
P83 Aft APU Equipment Control and Circuit Breaker Panel 1) APU PRIME CONT
S 862-129
(12)
Do these steps to dry motor the APU:
(a)
Remove the DO-NOT-OPERATE tag from the APU control switch on the P5 overhead panel.
(b)
Set the APU control switch to the START position and then release to the ON position.
(c)
After you operate the APU for 30 seconds, set the APU control switch to the OFF position.
NOTE: Make sure you obey the duty cycles for the starter
____
motor in table 201.
S 862-130
(13)
Make sure the APU control switch on the P5 overhead panel is OFF and attach a DO-NOT-OPERATE tag.
S 862-273
(14)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6-2 Main Power Distribution Panel
1) 6K18, APU ALTN CONT
(b)
P83 Aft APU Equipment Control and Circuit Breaker Panel 1) APU PRIME CONT
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A
747-400 MAINTENANCE MANUAL
S 422-322
(15)
Do these steps to connect the fuel pressure tube (2) to the flow divider and dump valve (4):
(a)
Lubricate the two new packings (1) with a light coat of fuel.
(b)
Install the two packings (1) on the transfer tube (3).
(c)
Install the transfer tube (3) on the flow divider and dump valve (4).
(d)
Connect the fuel pressure tube (2) to the flow divider and dump valve (4). 1) Tighten the coupling nut on the fuel pressure tube (2) to
320-350 inch-pounds (36.2-39.6 newton-meters).
S 642-324
CAUTION: DO NOT LET THE LUBRICANT TOUCH THE CONDUCTORS IN THE TWO
_______ IGNITION CABLES. A HIGH RESISTANCE BETWEEN THE TWO IGNITER PLUGS AND IGNITION EXCITER WILL RESULT IN DAMAGE TO THE TWO IGNITION CABLES.
(16)
Lightly apply the spray lubricant to the seal seat area at the ends of the two ignition cables (5).
S 422-326
(17)
Connect the two ignition cables (5) to the ignition exciter (6).
CAUTION: DO NOT LET THE BRAIDS OR FERRULES OF THE TWO IGNITION
_______ CABLES MOVE WHEN YOU TIGHTEN THE TWO COUPLING NUTS. DAMAGE TO THE TWO IGNITION CABLES CAN OCCUR.
(a) Tighten the two coupling nuts with your fingers plus 1/8 of a turn.
S 422-325
(18)
Connect the electrical connector D95006 (P6) (7) to the ignition exciter (6).
(a)
Tighten the coupling ring on the electrical connector D95006 (P6) (7) until the electrical connector is at the bottom of the receptacle and the connection is tight.
(b)
Make sure the electrical connection is not loose when you move the APU harness.
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747-400 MAINTENANCE MANUAL
G. Put the Airplane Back to Its Usual Condition
S 862-047
(1)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6-2 Main Power Distribution Panel
1) 6K18, APU ALTN CONT
(b)
P83 Aft APU Equipment Control and Circuit Breaker Panel 1) APU PRIME CONT
S 862-048
(2)
Remove the DO-NOT-OPERATE tag from the APU control switch on the P5 overhead panel.
S 412-046
(3)
Close the left APU access door, 317AL, and right APU access door, 318AR:
(a)
Remove the two quick-release pins, disconnect the two hold-open rods and put the two hold-open rods in the two clips on the right access door.
(b)
Install the two quick-release pins in the two brackets on the right APU compartment bulkhead.
(c) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 机载辅助动力 1(20)
