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757
MAINTENANCE MANUAL
C. Access
(1) Location Zones
211/212 Control Cabin - Section 41
D. Prepare for Removal
S 864-072
(1)
Supply electrical power to the main AC buses (AMM 24-22-00/201).
S 864-073
(2)
Put the WIPER switch in the OFF position to put the motor/converter unit in the park position.
S 864-074
(3)
Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11R13, WSHLD WIPER LEFT
(b)
11R22, WSHLD WIPER RIGHT
S 864-075
WARNING: BEFORE YOU DO MAINTENANCE ON THE WINDSHIELD WIPER SYSTEM, OPEN
_______ THE WINDOW HEAT CIRCUIT BREAKERS. IF THE CIRCUIT BREAKERS ARE NOT OPEN, PERSONS CAN GET AN ELECTRICAL SHOCK WHEN THEY TOUCH THE WINDSHIELD.
(4) Open these circuit breakers on the right miscellaneous relay panel, P37, and attach DO-NOT-CLOSE tags:
(a)
37E3, WINDOW HTR 2L
(b)
37E4, WINDOW HTR 3L
(c)
37J2, WINDOW HTR 1R
S 864-077
(5) Open these circuit breakers on the miscellaneous electrical
equipment panel, P70, and attach DO-NOT-CLOSE tags:
(a)
70A3, WINDOW HTR 2R
(b)
70A4, WINDOW HTR 3R
(c)
70C13, WINDOW HTR 1L
E. Remove the Windshield Wiper Arm (Fig. 401)
S 434-019
CAUTION:_______DO NOT LIFT THE WIPER ARM HIGHER THAN NECESSARY. DAMAGE TO THE WIPER ARM CAN OCCUR IF YOU LIFT IT TOO HIGH.
(1)
Put the pad between the wiper arm and windshield to protect the windshield surface.
S 034-020
(2)
Remove the sealant from the heads of the screws, bolts, and shaft tightening slot on the wiper arm hub.
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757 MAINTENANCE MANUAL
S 034-021
(3)
Loosen the pressure adjusting bolt to release the pressure on the wiper arm.
S 034-022
(4)
Loosen the clamping screw on the wiper arm hub.
S 024-093
CAUTION:_______DISCARD THE HUB HOLDDOWN BOLT. THE HUB HOLDDOWN BOLT CAN BECOME LOOSE IF USED AGAIN.
(5)
Remove the hub holddown bolt, flat washer, wiper arm, and adjustment sleeve.
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本文链接地址：757 AMM 飞机维护手册 防冰和排雨 CHAPTER 30 - ICE AND RAIN PROTECTION(148)
