S 424-028
(1)
Put the fan (9) into position in the duct so that the flow arrow on the fan points aft.
(2)
Pull one sleeve (8) over each duct-fan joint.
S 434-030
(3)
Install the bolt (1), washer (2), and nut (3) that attach the top fan bracket (4) to the rod support (5). Do not tighten.
S 434-031
(4)
Install the bolts (11), washers (12), nuts (13), and isolators (14) that attach the lower fan bracket (10) to the fan support. Do not tighten.
S 434-029
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757 MAINTENANCE MANUAL
S 434-032
(5)
Install the bolt (16), washers (17), and nut (18) that attach the jumper assembly (15) to the fan (9).
S 434-033
(6)
Tighten all the nuts.
S 434-034
(7)
Install the clamps (7) on each end of the fan. Tighten the clamp screws to 20-25 pound inches.
S 434-055
(8)
Connect the electrical connector (6) to the fan (9).
E.
Install the left recirculation air fan
S 424-035
(1)
Put the fan (32) into position in the duct so that the flow arrow of the fan points aft.
S 434-036
(2)
Pull one sleeve (30) over each duct-fan joint.
S 434-037
(3)
Install the eye-bolt (20), washer (21), nut (22), and isolator (23) that attaches the rod support (19) to the top of the fan (32). Do not tighten.
S 434-038
(4)
Install the bolts (27), washers (28), nuts (29), and isolators (26) that attach the fan (32) to the inboard and outboard fan brackets (37,25). Do not tighten.
S 434-039
(5)
Install the bolt (34), washer (35), and nut (36) that attaches the jumper assembly (33) to the fan (32).
(6)
Tighten all the nuts.
S 434-041
(7)
Install the clamps (24) on each end of the fan. Tighten the clamp screws to 20-25 pound inches.
S 434-040
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757 MAINTENANCE MANUAL
S 434-054
(8)
Connect the electrical connector (31) to the fan (32).
F.
Do the recirculation fan installation test
S 864-042
(1) If the right cabin air recirculation fan was installed, remove the DO-NOT-CLOSE identifier and close these circuit breakers:
(a) (b) On the pilot's-overhead-circuit-breaker panel (P11): 1) 11P23, RECIRC CARGO FIRE CONT RIGHTOn the miscellaneous-electrical-equipment-panel (P37): 1) 37J5, RECIRC FAN R
S 864-043
(2) If the left cabin air recirculation fan was installed, remove the DO-NOT-CLOSE identifier and close these circuit breakers:
(a) (b) On the pilot's-overhead-circuit-breaker panel (P11): 1) 11P14, RECIRC CARGO FIRE CONT LEFTOn the miscellaneous-electrical-equipment panel (P70): 1) 70C10, RECIRC FAN L
S 864-045
(3) Supply the electrical power (AMM 24-22-00/201).
S 864-046
(4) Push the applicable (L or R) RECIRC FAN switch/light, on the pilot's-overhead-control-panel P5, to the ON position.
S 714-048
(5) Listen for the fan to operate.
S 794-049
(6) Make sure that air does not leak from around the fan-duct joints. (a) A small leak is permitted. (b) You must repair a large leak.
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本文链接地址：757 AMM 飞机维护手册 空调 AIR CONDITIONING 1(63)
