(b)
P6, Main Power Distribution Panel
1) 6B34, WINDOW HEAT 1L PWR
2) 6B17, WINDOW HEAT 1R PWR
(c)
P180, DC Power Distribution Panel
1) 180H26, WDO HEAT CONT 1L
2) 180H12, WDO HEAT CONT 1R
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30-42-01
ALL ú ú 02 Page 401 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SCREW
WASHERS
BLADE ASSEMBLY
SEE A
WIPED AREA
STOP
PARKED
POSITION
WIPER ARM
SEE B SEE C
A B
POSITION OF LEVER FOR ADJUSTMENT 35` MIN
2. SCREW
16. LOCKNUT
1. BLADE (PARKED POSITION)
TRIP STUD 13. ROD 3. WASHER
15. UNLATCH LEVER
WIPER ARM UNLATCH LEVER MECHANISM - PARKED POSITION
C
Wiper Blade Installation Figure 401
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30-42-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 954-004
(3) Put cloth pad between the wiper arm and the airplane structure to prevent scratches in the surface when you remove the blade.
S 024-015
CAUTION:_______DO NOT LIFT THE ARM ASSEMBLY MORE THAN 0.5 INCHES. YOU CAN CAUSE DAMAGE TO THE ARM ASSEMBLY AND MAKE IT UNSERVICEABLE.
(4) Remove the screw, washers, and wiper blade, and lower the arm onto the cloth pad.
TASK 30-42-01-404-006
3. Windshield Wiper Blade Installation (Fig. 401)___________________________________
A. References
(1)
AIPC 30-42-01, Fig. 1
(2)
SSM 30-42-01
(3)
WDM 30-42-11
B. Access
(1) Location Zone 221 Control Cabin, LH - Outside No. 1 Left Window 222 Control Cabin, RH - Outside No. 1 Right Window
C. Procedure
S 424-017
(1) Hold the wiper blade in location, install the two washers (one on each side of the blade), and tighten the screw.
NOTE: Reuse of wiper blade attach screw is not recommended.
____
S 954-008
(2)
Remove the cloth pad.
(3)
Make sure that the blade turns freely.
S 714-009
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-013
CAUTION: THE WIPER BLADE MUST BE PARALLEL TO THE WIPER ARM WHEN IN THE
_______ PARKED POSITION. IF IT IS NOT PARALLEL, THE WIPER BLADE WILL LIFT DURING FLIGHT.
(4)
Align the blade with the arm.
S 864-014
(5)
Make sure the unlatch lever is in the parked position.
S 864-011
(6)
Lower the wiper blade against the airplane structure inboard of the stop.
S 864-012
(7)
Close these circuit breakers:
(a)
P7, Overhead Circuit Breaker Panel
1) 7E1, WSHLD WIPER L
2) 7E25, WSHLD WIPER R
(b)
P6, Main Power Distribution Panel
1) 6B34, WINDOW HEAT 1L PWR
2) 6B17, WINDOW HEAT 1R PWR
(c)
P180, DC Power Distribution Panel
1) 180H26, WDO HEAT CONT 1L
2) 180H12, WDO HEAT CONT 1R
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 防冰和排雨 ICE AND RAIN PROTECTION(61)
