(a) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
1) P6 Main Power Distribution Panel
a) 6F35, PACK TEMP CONT A
b) 6F36, PACK TEMP CONT B
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747-400 MAINTENANCE MANUAL
2) P415 Power Distribution Center - Right a) 415C38, PACK TEMP CONT B b) 415K27, PACK TEMP CONT A
(b)
Supply electrical power (AMM 24-22-00/201).
(c)
Remove the DO-NOT-OPERATE tag from the PACKS (1, 2 or 3) switch on the P5 overhead panel.
(d)
Put the PACKS (1, 2 or 3) switch to NORM for the applicable pack (1, 2 or 3).
NOTE: The actuator pushrod will move to the fully retracted
____
position and then stop.
(e)
Make sure that the actuator pushrod moves to the fully retracted position, stops and stays retracted.
(f)
Put the PACKS switch to OFF.
(g)
Put the DO-NOT-OPERATE tag on the PACKS switch.
(h)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
1) P6 Main Power Distribution Panel a) 6F35, PACK TEMP CONT A b) 6F36, PACK TEMP CONT B
2) P415 Power Distribution Center - Right a) 415C38, PACK TEMP CONT B b) 415K27, PACK TEMP CONT A
(i) Remove electrical power (AMM 24-22-00/201).
S 864-036
(6)
Hold the exit door in the fully open position.
S 434-037
(7)
Connect the actuator pushrod to the actuator arm with the bolt (6), washer (7) and nut (8).
S 724-043
(8)
Do the steps of the installation of the limit switch for the ram air exit door that adjust the limit switch (AMM 21-62-12/401).
G. Do a Test of the Actuator
S 864-038
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-039
(2)
Remove the DO-NOT-OPERATE tag from the PACKS switch on the P5 overhead panel.
S 864-021
(3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6 Main Power Distribution Panel
1) 6F35, PACK TEMP CONT A
2) 6F36, PACK TEMP CONT B
(b)
P415 Power Distribution Center - Right
1) 415C38, PACK TEMP CONT B
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2) 415K27, PACK TEMP CONT A
S 744-040
(4)
Do the ground test for the pack temperature controllers, A and B, while you monitor the operation of the exit door (AMM 21-51-00/501).
S 214-041
(5)
Make sure the exit door moves smoothly and freely, and without the sound of clicks during the operation.
S 214-042
(6)
Make sure that when the door is in the closed position, the lower surface at each louver is in alignment within +/- 0.25 inches
(6.35 mm).
H. Put the Airplane Back to Its Usual Condition
S 414-011
(1) Close the access panel for the applicable pack (AMM 06-09-03/201):
-191EL for the pack 1
-191ML for the pack 2
-192ER for the pack 3.
S 864-012
(2) Remove the electrical power if it is not necessary
(AMM 24-22-00/201).
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