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A
747-400
MAINTENANCE MANUAL
PACK NO. 2 RAM AIR INLET DOOR ACTUATOR SEE A
PACK NO. 1 RAM AIR INLET DOOR ACTUATOR ASEE 1. 6. ACTUATOR DOOR ACTUATOR RAM AIR INLET PACK NO. 3 ASEE 2. (3 PLACES) WASHER NUT 3. BONDING JUMPER 4. SCREW
SEE B
5. ELECTRICAL CONNECTOR
SEE B
10. NUT BOLT7.
FWD INBD A
NOTE:____ PACK 1 ACTUATOR INSTALLATION SHOWN, PACKS 2 AND 3 ARE ALMOST THE SAME. 9. WASHER PLAIN B 8. COUNTERSUNK WASHER
Ram Air Inlet Door Actuator Installation Figure 401 (Sheet 1)
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747-400 MAINTENANCE MANUAL
AIR CYCLE
RAM AIR SYSTEM
RAM AIR DUCT
RAM AIR INLET DOOR OPEN
Ram Air Inlet Door Actuator Installation
Figure 401 (Sheet 2)
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F00283
A
747-400 MAINTENANCE MANUAL
S 864-019
(2)
Put the PACKS (1, 2 or 3) switch to OFF, on the P5 overhead panel for the applicable pack (1, 2 or 3).
S 864-020
(3)
Put a DO-NOT-OPERATE tag on the PACKS switch.
S 864-021
(4)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(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
2) 415K27, PACK TEMP CONT A
D. Remove the Actuator
S 034-022
(1) Disconnect the electrical connector (5) from the actuator (6):
-DV105 for the Pack 1 actuator
-DV106 for the pack 2 actuator
-DV107 for the pack 3 actuator.
S 034-023
(2)
Remove the screw (4), washers (2), and nut (1) to disconnect the bonding jumper (3) from the actuator (6).
S 034-024
(3)
Remove the bolt (7), washers (8 and 9), and nut (10) to disconnect the actuator pushrod from the bellcrank.
S 034-025
(4)
Remove the bolt (7), washers (8 and 9), and nut (10) to disconnect the actuator (6) from the airframe bracket.
(5)
Remove the actuator (6).
S 024-026
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747-400
MAINTENANCE MANUAL
TASK 21-62-03-404-004
3. Ram Air Inlet Door Actuator Installation (Fig. 401)
________________________________________
A. Equipment
(1) Bonding Meter
B. Consumable Materials
(1)
B00192 Solvent, BMS 3-2, type 1
(2)
G00378 Alodine
(3)
G00033 Lint-free cheesecloth
C. Parts
~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Nut | 21-62-14 | 01 | 25 | | | 2 | Washer | | | 20 | | | 3 | Bonding Jumper | | | 10 | | | 4 | Screw | | | 15 | | | 6 | Actuator | | | 55 | | | 7 | Bolt (aft end) | | | 35 | | | 7 | Bolt (forward end) | | | 30 | | | 8 | Washer | | | 40 | | | 9 | Washer | | | 45 | | | 10 | Nut | | | 50 | 2......…........…...................................…..........….....….........1
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