26-12-01
ALL ú ú 01 Page 402 ú Jun 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 024-026
(3)
Access to the aft strut overheat switches S10196, S10199, S10202, and S10205 may require disconnection of the strut pneumatic duct. If this is required, do this procedure: Pneumatic Duct - Removal/Installation (AMM 36-11-01/401).
S 034-003
(4)
Disconnect the wires from the terminals on the strut overheat switch.
S 034-021
(5)
Remove the sealant around the switch on the top or the bottom where applicable.
S 034-022
(6)
Remove the washer and lock nut if applicable.
S 034-004
(7)
Loosen the switch and remove.
TASK 26-12-01-424-005
3. Install the Strut Overheat Switch (Fig. 401)_________________________________
A. References
(1)
AMM 06-43-00/201, Engine Nacelle Access Doors and Panels
(2)
AMM 24-22-00/201, Electrical Power Control
(3)
AMM 78-31-00/201, Thrust Reverser System
B. Access
(1)
Location Zones
119/120 Main Equipment Center
200 Upper Half of Fuselage
211/212 Flight Compartment
430/440 No. 1/No. 2 Nacelle Strut
(2)
Access Panels
(a)
413, 423 L, R Fan Cowl Panel (Left)
(b)
414, 424 L, R Fan Cowl Panel (Right)
(c)
415, 425 L, R Fan Reverser (Left)
(d)
416, 426 L, R Fan Reverser (Right)
(e)
432AL, 433JR, 433LR Nacelle Strut - Left engine No. 1
(f)
442AL, 443HL, 443LL Nacelle Strut - Right Engine No. 2
C. Procedure
S 754-006
(1) Make sure these circuit breakers on the overhead circuit breaker panel, P11, are open and attach DO-NOT-CLOSE tags:
(a)
11B20, FIRE DETECTION L ENGINE 1
(b)
11B21, FIRE DETECTION L ENGINE 2
(c)
11B22, FIRE DETECTION R ENGINE 1
(d)
11B23, FIRE DETECTION R ENGINE 2
(e)
11J26, FIRE DET ALTN PWR ENGINE LEFT
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
26-12-01
ALL ú ú 01 Page 403 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
(f) 11J27, FIRE DET ALTN PWR ENGINE RIGHT
S 754-007
(2)
Make sure the surfaces where the switches are to be installed are clean and free of damage.
S 434-008
(3)
Install the strut overheat switches using existing fasterners on the bottom of the upper spar or lock nuts, or washers if applicable.
NOTE: Switches in the precooler area are installed on the washers
____ and are sealed with sealant DC 93-000. Switches which are forward and aft of the precooler do not require washers, but are sealed with sealant DC 93-000.
S 434-023
(4)
Tighten to a maximum of 22 pound-inches (2.48 Newton.Meters) for the forward and aft strut overheat switches S10194, S10198, S10201, S10204, S10196, S10199, S10202, and S10205. Tighten to a maximum of 40 pound-inches (4.5 Newton. Meters) for the precooler area strut overheat switches S10195, S10197, S10200, and S10203.
S 434-009
(5)
Connect the wires to the terminals on the switch.
D. Do a test of the Strut Overheat Switch Installation
S 864-010
(1)
Supply electrical power (AMM 24-22-00/201).
S 034-011
(2)
Remove the DO-NOT-CLOSE tags, and close these circuit breakers on the P11 panel:
(a)
11B20, FIRE DETECTION L ENGINE 1
(b)
11B21, FIRE DETECTION L ENGINE 2
(c)
11B22, FIRE DETECTION R ENGINE 1
(d)
11B23, FIRE DETECTION R ENGINE 2
(e)
11J26, FIRE DET ALTN PWR ENG LEFT
(f)
11J27, FIRE DET ALTN PWR ENG RIGHT
(3)
Close the EICAS circuit breakers on the P11 panel six locations.
(4) 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 防火 FIRE PROTECTION 1(42)
