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SUBTASK 27-51-42-440-005
(11) Do this task: Trailing Edge Flap System Reactivation, TASK 27-51-00-440-801.
SUBTASK 27-51-42-860-014
(12) Retract the trailing edge flaps to the retracted position, do this task: Retract the Trailing Edge
Flaps, TASK 27-51-00-860-804.
------------------------- END OF TASK ---------------------------
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Outboard Flap Ballscrew and Gimbal Inspection
Figure 601 (Sheet 1 of 2)/27-51-42-990-803
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Outboard Flap Ballscrew and Gimbal Inspection
Figure 601 (Sheet 2 of 2)/27-51-42-990-803
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TASK 27-51-42-220-802
3. Outboard Flap Inboard Ballscrew Inspection
(Figure 601)
A. General
(1) This task is applicable to the ballscrew and ballscrew nut at flap supports No. 2 and 7.
(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)
27-51-28-000-804 Outboard Flap Inboard Support Aft Fairing Removal (P/B 401)
27-51-28-400-804 Outboard Flap Inboard Support Aft Fairing Installation (P/B 401)
27-51-42-000-802 Outboard Flap Inboard Ballscrew and Gimbal Removal (P/B 401)
27-51-42-400-802 Outboard Flap Inboard 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
543 Left Wing - Fairing Flap Support No. 2
567 Left Wing - Outboard Flap
643 Right Wing - Fairing Flap Support No. 7
667 Right Wing - Outboard Flap
E. Prepare for the Inspection
SUBTASK 27-51-42-860-015
(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 27-51-42-040-005
(2) Do this task: Trailing Edge Flap System Deactivation, TASK 27-51-00-040-801.
F. Outboard Flap Inboard 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.
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SUBTASK 27-51-42-480-004
(1) Install the dial indicator assembly on the ballscrew:
NOTE: The dial indicator assembly is a part of the tester, SPL-1753.
(a) Put the dial indicator assembly on the ballscrew.
NOTE: Make sure the pointer touches the forward end of the ballscrew nut.
(b) Put the strap around the ballscrew to help hold the dial indicator assembly on the
ballscrew.
(c) Adjust the dial indicator to zero.
SUBTASK 27-51-42-220-003
(2) Measure the backlash of the ballscrew and ballscrew nut:
(a) Push up on the outboard trailing edge of the outboard flap.
NOTE: This will apply a load to the ballscrew nut, and move it forward on the ballscrew.
(b) Use the dial indicator to measure the movement of the ballscrew nut.
NOTE: The movement of the ballscrew nut is the backlash.
(c) Do these steps a total of five times to make sure the movement of the dial indicator is
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737-600-700-800-900 飞机维护手册5 AIRCRAFT MAINTENANCE MANUA(71)
