757 MAINTENANCE MANUAL
(3)
Vacuum - commercially available
B.
Parts
~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT |FIG | ITEM | ................................................................................ | 401 | 1 | Fan | 21-44-05 | 01 | 135 | | | 2 | Clamp | | | 105 | | | 3 | Hose | | | 120 | | | 4 | Clamp | | | 110 | | | 5 | Nut (Self Locking) | | | 45 | | | 6 | Bolt | | | 55 | | | 7 | Washer | | | 90 | | | 8 | Nut (Self Locking) | | | 95 | | | 11 | Washer | | | 90 | | | 12 | Nut (Self Locking) | | | 95 | 2......…........…...................................…...........….....…........1
C. References
(1)
AMM 06-46-00/201, Entry, Service, and Cargo Doors, Access Doors and Panels
(2)
AMM 24-22-00/201, Electric Power Control
(3)
AMM 25-50-03/401, Bulkhead Lining Panels
D.
Access
(1)
Location Zones
153/154 Aft Cargo Compartment
E.
Procedure
(1)
Align the fan (1) with the cargo heating duct.
S 434-015
(2)
Install the bolts (6), washers (7), and nuts (8) in the top fan support lugs.
S 424-014
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S 434-016
(3)
Install the nut (12) and washer (11) on the eyebolt at the lower fan support lug.
S 434-017
(4)
Put the hoses (3) in two locations on the fan-duct connection.
S 434-018
(5)
Install the clamps (2 and 4) in four locations. Tighten.
S 434-019
(6)
Install the nut (5) that connects the bonding jumper (9) to the fan (1).
S 434-020
(7)
Connect the electrical connector to the fan.
S 414-021
(8)
Install the bulkhead lining (AMM 25-50-03/401).
S 864-022
(9)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the overhead circuit breaker panel, P11:
(a)
11N22, CARGO HEAT FAN AFT
S 864-023
(10)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the right miscellaneous electrical equipment panel, P37:
(a)
37C2, AFT CARGO FAN
S 144-025
(11)
Clean the aft cargo heating intake grill as follows:
(a)
Remove the intake grill.
(b)
Vacuum the front and back side of the grill to remove all of the dirt and debris.
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(c)
Install the intake grill. S 704-026
(12)
Do a test of the aft cargo heating flow fan.
(a) Supply electrical power (AMM 24-22-00/201).
NOTE:____ The aft cargo heating flow fan operates automatically.
A signal from a temperature switch puts the fan on or
off.
(b) Listen to make sure the fan operates.
1) If the ambient temperature in the cargo compartment is more
than 50°F, apply the cooling source to the temperature
thermal switch for the cargo compartment. Decrease the
switch temperature until the fan operates.
S 414-027
(13)
Close the No. 2 Cargo Door (822) (AMM 06-46-00/201).
S 864-028
(14)
Remove electrical power, if it is not necessary.
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