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AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-51-41-440-002
(2) Do this task: Trailing Edge Flap System Reactivation, TASK 27-51-00-440-801.
SUBTASK 27-51-41-860-007
WARNING: KEEP PERSONS AND EQUIPMENT CLEAR OF THE FLIGHT CONTROL SURFACES, THE
THRUST REVERSERS, AND THE LANDING GEAR. THESE COMPONENTS CAN MOVE
SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURIES TO
PERSONS AND DAMAGE TO EQUIPMENT.
(3) Supply system B hydraulic power, do this task: Hydraulic System A or B Pressurization,
TASK 29-11-00-860-801.
SUBTASK 27-51-41-860-008
(4) Use the primary system to retract the flaps to the retracted position. To retract the flaps, do this
task: Trailing Edge Flap System Operation With Primary Control, TASK 27-51-00-860-801.
SUBTASK 27-51-41-860-009
(5) Use the primary system to extend and retract the flaps. To extend and retract the flaps, do this
task: Trailing Edge Flap System Operation With Primary Control, TASK 27-51-00-860-801.
SUBTASK 27-51-41-210-005
(6) Make sure the torque trip indicator [71] on the transmission assembly [64] is set.
SUBTASK 27-51-41-210-006
(7) Make sure the flap position indicator on the center instrument panel shows the UP position.
SUBTASK 27-51-41-860-010
(8) Remove system B hydraulic power, do this task: Hydraulic System A or B Power Removal,
TASK 29-11-00-860-805.
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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OUTBOARD FLAP BALLSCREWS AND GIMBALS - REMOVAL/INSTALLATION
1. General
A. This procedure has these tasks:
(1) A removal of the outboard ballscrew and gimbal for the outboard flap
(2) An installation of the outboard ballscrew and gimbal for the outboard flap
(3) A removal of the inboard ballscrew and gimbal for the outboard flap
(4) An installation of the inboard ballscrew and gimbal for the outboard flap.
TASK 27-51-42-000-801
2. Outboard Flap Outboard Ballscrew and Gimbal Removal
(Figure 401)
A. General
(1) This task is applicable to the ballscrew and gimbal at flap supports No. 1 and 8.
B. References
Reference Title
27-51-00-040-801 Trailing Edge Flap System Deactivation (P/B 201)
27-51-00-860-803 Extend the Trailing Edge Flaps (P/B 201)
27-51-00-980-801 Trailing Edge Flap System Manual Operation (P/B 201)
27-51-28-000-802 Outboard Flap Outboard Support Aft Fairing Removal (P/B 401)
C. Location Zones
Zone Area
544 Left Wing - Fairing Flap Support No. 1
567 Left Wing - Outboard Flap
644 Right Wing - Fairing Flap Support No. 8
667 Right Wing - Outboard Flap
D. Prepare for the Removal
SUBTASK 27-51-42-860-001
(1) Extend the trailing edge flaps to the 40-unit position. To extend them, do this task: Extend the
Trailing Edge Flaps, TASK 27-51-00-860-803.
SUBTASK 27-51-42-040-001
(2) Do this task: Trailing Edge Flap System Deactivation, TASK 27-51-00-040-801.
SUBTASK 27-51-42-010-001
(3) Do this task: Outboard Flap Outboard Support Aft Fairing Removal, TASK 27-51-28-000-802.
E. Outboard Flap Outboard Ballscrew and Gimbal Removal
SUBTASK 27-51-42-980-001
(1) Manually extend the trailing edge flaps to the downstop on the ballscrew. To extend them, do
this task: Trailing Edge Flap System Manual Operation, TASK 27-51-00-980-801.
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EFFECTIVITY
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SUBTASK 27-51-42-020-001
CAUTION: MAKE SURE YOU HOLD THE BALLSCREW WHILE YOU DISCONNECT IT. IF YOU LET
THE U-JOINT HOLD THE BALLSCREW, YOU WILL CAUSE DAMAGE TO THE U-JOINT.
(2) Disconnect the ballscrew assembly [2] with the gimbal assembly [14] from the carriage [1]:
NOTE: When you disconnect the ballscrew assembly [2] from the carriage [1], the outboard
flap can move a small distance to the downstop on the flap track.
(a) Remove the nut [8], washer [7] and bolt [6] from the carriage [1].
(b) Remove the inboard carriage bushing [9] and outboard carriage bushing [15] from the
gimbal assembly [14] and the carriage [1].
(c) Move the ballscrew assembly [2] and gimbal assembly [14] away from the carriage [1].
SUBTASK 27-51-42-020-002
(3) Disconnect the ballscrew assembly [2] from the yoke [4] on the transmission [3]:
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737-600-700-800-900 飞机维护手册5 AIRCRAFT MAINTENANCE MANUA(64)
