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this task: Outboard Flap Inboard Ballscrew and Gimbal Lubrication, TASK 12-22-51-640-804.
SUBTASK 27-51-42-820-002
(5) Do this task: Trailing Edge Flap Drive System Adjustment, TASK 27-51-00-820-802.
G. Put the Airplane Back to Its Usual Condition
SUBTASK 27-51-42-410-002
(1) Do this task: Outboard Flap Inboard Support Aft Fairing Installation, TASK 27-51-28-400-804.
SUBTASK 27-51-42-440-002
(2) Do this task: Trailing Edge Flap System Reactivation, TASK 27-51-00-440-801.
SUBTASK 27-51-42-860-007
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 27-51-42-860-008
(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 27-51-42-860-009
(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 27-51-42-860-010
(6) 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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Page 417
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
OUTBOARD FLAP BALLSCREWS AND GIMBALS - INSPECTION/CHECK
1. General
A. This procedure has these tasks:
(1) A check of the backlash in the outboard ballscrew on the outboard flap
(2) A check of the backlash in the inboard ballscrew on the outboard flap
TASK 27-51-42-220-801
2. Outboard Flap Outboard Ballscrew Inspection
(Figure 601)
A. General
(1) This task is applicable to the ballscrew and ballscrew nut at flap supports No. 1 and 8.
(2) There are two methods that you can use to apply a load to the ballscrew nut to measure the
movement on the ballscrew. This procedure gives instructions for each method.
(a) You can push up on the trailing edge of the flap to apply the load.
(b) You can use the lever and clamp tool to apply the load to the ballscrew nut.
(3) It is not necessary to use the two methods to apply the load.
B. References
Reference Title
27-51-00-040-801 Trailing Edge Flap System Deactivation (P/B 201)
27-51-00-440-801 Trailing Edge Flap System Reactivation (P/B 201)
27-51-00-860-803 Extend the Trailing Edge Flaps (P/B 201)
27-51-00-860-804 Retract the Trailing Edge Flaps (P/B 201)
27-51-28-000-802 Outboard Flap Outboard Support Aft Fairing Removal (P/B 401)
27-51-28-400-802 Outboard Flap Outboard Support Aft Fairing Installation (P/B 401)
27-51-42-000-801 Outboard Flap Outboard Ballscrew and Gimbal Removal (P/B 401)
27-51-42-400-801 Outboard Flap Outboard Ballscrew and Gimbal Installation (P/B 401)
C. Tools/Equipment
NOTE: When more than one tool part number is listed under the same "Reference" number, the
tools shown are alternates to each other within the same airplane series. Tool part numbers
that are replaced or non-procurable are preceded by "Opt:", which stands for Optional.
Reference Description
SPL-1753 Equipment - Test, Flap Screw Backlash
(Part #: C27030-49, Supplier: 81205, A/P Effectivity: 737-600, -700,
-700C, -700ER, -700QC, -800, -900, -900ER, -BBJ)
D. 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
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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Oct 10/2006
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BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
E. Prepare for the Inspection
SUBTASK 27-51-42-860-011
(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 27-51-42-040-003
(2) Do this task: Trailing Edge Flap System Deactivation, TASK 27-51-00-040-801.
F. Outboard Flap Outboard Ballscrew Backlash Check Without the Lever and Clamp Tool
NOTE: With this method, you manually push on the trailing edge of the flap to apply the load to the
ballscrew nut.
SUBTASK 27-51-42-480-001
　
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