21-58-01
ALL ú ú 01F Page 405 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
B. References
(1)
AMM 20-11-28/401, Lockwire
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings
(4)
AIPC 21-58-01 Fig. 1
(5)
AIPC 21-58-01 Fig. 2
(6)
WDM 21-58-21, 21-58-23
(7)
SSM 21-58-04, 21-58-05
C. Access
(1) Location Zone
121 Forward Cargo Compartment Forward Half, LH
122 Forward Cargo Compartment Forward Half, RH
D. Install the Fan
S 434-016
(1) Remove the covers from the duct openings.
(a) Make sure there is no unwanted material in the ducts.
S 424-017
(2)
To install the supply fan, put the fan (5) in its position with the flow arrow pointed forward.
S 424-018
(3)
To install the exhaust fan, put the fan (5) in its position with the flow arrow pointed down.
S 434-019
(4)
Install the bolts (3) and nuts (4) (supply fan only) that hold the fan to the shockmount.
S 434-020
(5)
Install a lockwire in the shockmount bolts (Ref 20-11-28/401).
S 434-021
(6)
Put the clevis (11), washer (14) (exhaust fan only), and support rod (17) in the fan bracket.
S 434-022
(7)
Install the nut (15) and the washer (16) on the clevis (11) to hold the support rod (17) to the fan (5).
(8)
Put the support rod (18) in the clevis (11).
S 434-023
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21-58-01
ALL ú ú 01F Page 406 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 434-024
(9)
Install the bolt (12) and the nut (13) to hold the support rod (18) to the clevis (11).
S 434-025
(10)
Put the duct sleeves (2) on each end of the fan (5).
(a) Make sure the duct joint is in the middle of the duct sleeve.
S 434-026
(11)
Install a clamp (1) on each end of the fan (5) to hold the duct sleeve (2) on the fan.
S 434-027
(12)
Connect the bonding jumper (7) to the fan (5) with the screw (8), washer (9), and nut (10).
S 434-028
(13)
Connect the electrical connector (6) to the fan (5):
(a)
Supply fan DB7436
(b)
Exhaust fan DB7437
S 864-067
(14) Move the EQUIP COOLING switch to the OVERRIDE position for at least 30 seconds but not more than 60 seconds.
E. Do the Installation Test for the Fan
S 864-029
(1)
Make sure the EQUIP COOLING selector, on the overhead panel, P5, is in the NORM position.
S 864-030
(2)
Supply electrical power (Ref 24-22-00/201).
S 714-031
(3)
Make sure the fan comes on.
S 794-032
(4)
Feel for leaks around the fan.
(a)
Small leaks are permitted.
(b)
You must repair a large leak.
F. Put the Airplane to Its Usual Condition
S 414-033
(1)
Install the sidewall panel that you removed to get access to the fan (AMM 25-52-01/401).
S 864-034
(2)
Remove the electrical power, if it is not necessary
(AMM 24-22-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 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 空调 AIR CONDITIONING 2(83)
