____________________
1. General_______
A. This subject has two tasks, one for the removal and one for the installation of the sensitive annunciator feedback switch assembly (which is referred to as the "switch assembly"). The procedure has these parts:
(1)
The removal of the switch assembly (including removal of switch actuator).
(2)
The installation of switch assembly (including installation of switch actuator).
(3)
An operational test of the switch assembly.
B.
The switch assembly is on the LE flap power drive unit (PDU).
C.
The removal and installation procedure is the same for all the switch assemblies of the LE flap PDUs.
TASK 27-88-01-004-001
2. Sensitive Annunciator Feedback Switch Assembly Removal (Fig. 401)______________________________________________________
A. References
(1)
AMM 27-81-00/201, Leading Edge Flap System
(2)
AIPC 27-81-03, Fig. 1
(3)
SSM 27-88-01, SSM 27-88-02
(4)
WDM 27-88-11, WDM 27-88-12
B.
Access
(1)
Location Zone
535 Variable Camber Flap, LH
525 Variable Camber Flap, LH
523 Variable Camber Flap, LH
513 Krueger Flap, Inboard - Center, LH
613 Krueger Flap, Inboard - Center, RH
623 Variable Camber Flap, RH
625 Variable Camber Flap, RH
635 Variable Camber Flap, RH
C.
Procedure
S 864-023
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC AND PNEUMATIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1)
Do this task: "Leading Edge Flaps Extension" (AMM 27-81-00/201).
S 044-025
(2)
Do this task: "Extended Leading Edge Flaps Deactivation and Safety Locks Installation" (AMM 27-81-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE A LEFT WING
(TOP VIEW) POWER
DRIVE
UNIT
SEE B
ELECTRICAL
CONNECTOR
A
DRIVE UNIT SWITCH ASSEMBLY SCREW (4 LOCATIONS)
SEE C
B
SEE D
ALTERNATE 4 HOLES FOR
POSITION SWITCH ASSEMBLY
CONTROLLER INSTALLATION
WASHER
SCREW BOLT (2 LOCATIONS) RETAINING
WASHER SWITCH STRAP
ASSEMBLYSWITCH SCREWACTUATOR
(PLATE) SCREW WASHER
SCREW
D C
____LEFT WING POSITION SWITCHES ARE SHOWN.
NOTE: RIGHT WING POSITION SWITCHES ARE EQUIVALENT.
Leading Edge Flap Position Switch Assembly Installation Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-004
(3)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P7, Overhead Circuit Breaker Panel 1) 7C10, FLT CONT ELEC 2L AC 2) 7C11, FLT CONT ELEC 2L DC 3) 7C12, FLT CONT ELEC 1L AC 4) 7C13, FLT CONT ELEC 1L DC 5) 7C14, FLT CONT ELEC 1R AC 6) 7C15, FLT CONT ELEC 1R DC 7) 7C16, FLT CONT ELEC 2R AC 8) 7C17, FLT CONT ELEC 2R DC
S 034-005
(4)
Disconnect the electrical connector from the switch assembly.
S 024-006
(5)
Remove the switch assembly:
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本文链接地址：747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 7(151)
