S 034-031
(1)
Remove the cover from the duct openings.
S 034-032
(2)
Make sure there is no unwanted material in the ducts.
S 424-015
(3)
Put the fan (4) into position in the duct.
(a)
On the side of the fan that is nearest to the other fan, make sure the isolators (5) are between the fan brackets (12).
(b)
On the side of the fan that is farthest from the other fan, make sure the isolator (5) is below the fan bracket (12).
S 434-016
(4)
Install the bolts (1, 13), washers (2), and nuts (3) that attach the fan brackets (12) to the support brackets (3 locations).
(a)
Do not tighten the bolts.
S 434-017
(5)
Move part of the flexible ducts on to the ends of the fan.
S 434-018
(6)
Install the clamps on the ends of the fan.
(a)
Do not tighten the clamps.
S 434-019
(7)
Connect the electrical connector to the fan.
S 434-020
(8)
Connect the bonding jumper to the fan.
(a)
To connect the bonding jumper (8) to the No. 1 fan (4):
1) Attach the bonding jumper to the fan with a screw (11), washer (10), and nut (9).
(b)
To connect the bonding jumper (8) to the No. 2 fan (4): 1) Use the cleaning method CM 1 (Ref 20-10-21) to clean the bonding jumper connection on the fan (4).
2) Attach the bonding jumper to the fan with a screw (11), washer (10), and nut (9).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-26-01
ALL ú ú 11 Page 406 ú Dec 20/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
3) Use the sealant to make a fillet seal all around the bonding jumper connection (Ref 51-31-01).
S 434-021
(9)
Tighten the clamps (7) on the ends of the fan to 20-25 pound-inches.
S 434-022
(10)
Tighten the nuts (3) that attach the fan (4) to the support
brackets.
F.
GUN 011-100, 105-999; Install the Fan (Fig. 401A)
S 034-049
(1)
Remove the cover from the duct opening.
S 214-050
(2)
Make sure there is no unwanted material in the duct.
S 424-051
(3)
Put the fan (9) into position on the support structure.
S 434-052
(4)
Connect the sleeve (4) to the fan (9).
S 434-053
(5)
Install the clamps (5, 8) at the each end of the fan (9).
(a)
Tighten the clamp (5) to 13-18 pound-inches.
(b)
Tighten the clamps (8) to 25-35 pound-inches.
S 434-054
(6)
Install the screws (1, 11), washers (2), and nuts (3) to connect the fan brackets (10) to the support structure.
S 434-055
(7)
Connect the bonding jumper (7) to the fan (9):
(a)
Use the cleaning method CM 1 to clean the bonding jumper connection (AMM 20-10-21/401).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-26-01
ALL ú ú 08 Page 407 ú Sep 20/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(b)
Install the screw (12), washers (2), and nut (3) to connect the bonding jumper (7) to the fan (9).
(c)
Use the sealant to make a fillet seal all around the bonding jumper connection (AMM 51-31-01/201).
S 434-056
(8)
Connect the electrical connector (6) to the fan (9).
G.
Do the installation test for the fans.
S 864-023
(1)
Supply electrical power (Ref 24-22-00).
S 864-024
(2)
If the No. 1 fan was installed, do the steps that follow:
(a)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：757 AMM 飞机维护手册 空调 AIR CONDITIONING 1(80)
