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(1) If hydraulic systems A and B have pressure, remove pressure from the elevator hydraulic
systems A and B. To remove hydraulic pressure, do this task: Remove Pressure from the
Elevator Hydraulic Systems A and B, TASK 27-31-00-800-802.
SUBTASK 27-31-00-010-037
(2) Open this access panel:
Number Name/Location
318BR Tailcone Access Door
SUBTASK 27-31-00-200-002
(3) Do a visual inspection of the Elevator Feel and Centering Unit:
(a) Check for any hydraulic leaks at the actuator seals and hydraulic line connections.
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(b) Check for unusual wear or loose parts at the Feel and Centering Unit connection points.
1) Make sure all of the hardware is installed and secure.
a) Tighten and properly secure any loose items.
2) If replacement is necessary, replace any loose or worn hardware with new hardware.
SUBTASK 27-31-00-410-027
(4) Close this access panel:
Number Name/Location
318BR Tailcone Access Door
SUBTASK 27-31-00-840-004
(5) If you need hydraulic pressure in systems A and B, do this task: Put the Elevator Systems A
and B Back to the Condition Before the Pressure Removal, TASK 27-31-00-840-802.
------------------------- END OF TASK ---------------------------
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Elevator Feel and Centering Unit/Elevator Control Pushrod
Figure 203/27-31-00-990-819
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GUN 001-099, 101-122, 155, 157, 205, 207-999; GUN 156, 201-204, 206 POST SB 737-55A1080
TASK 27-31-00-220-802
9. Elevator Tab and Tab Mechanism - Detailed Visual Inspection
A. References
Reference Title
27-31-31-400-801 Elevator Tab - Installation (P/B 401)
27-31-34-400-802 Elevator Tab Control Mechanism - Installation (P/B 401)
B. Location Zones
Zone Area
333 Left Horizontal Stabilizer - Rear Spar to Trailing Edge
334 Left Horizontal Stabilizer - Elevator
343 Right Horizontal Stabilizer - Rear Spar to Trailing Edge
344 Right Horizontal Stabilizer - Elevator
C. Access Panels
Number Name/Location
333BB Horizontal Stabilizer, Access Panel, Trailing Edge
343BB Horizontal Stabilizer, Access Panel - T.E. Area
D. Procedure
SUBTASK 27-31-00-860-159
(1) Remove pressure from the elevator hydraulic systems A and B. To remove hydraulic pressure,
do this task: Remove Pressure from the Elevator Hydraulic Systems A and B,
TASK 27-31-00-800-802.
SUBTASK 27-31-00-200-009
(2) Do a detailed visual inspection of the elevator tab hinges.
(a) Make sure all hardware is installed and secure. (TASK 27-31-31-400-801)
(b) Check for unusual wear and loose parts.
NOTE: Try to wiggle or move hinge bolts with hand pressure only.
(c) Inspect the lug assembly bearings to ensure the bearings are lubricated and in good
condition.
SUBTASK 27-31-00-420-013
(3) Tighten and properly secure any loose items.
SUBTASK 27-31-00-960-005
(4) Replace, as necessary, with any new hardware.
SUBTASK 27-31-00-010-044
(5) Open these access panels:
Number Name/Location
333BB Horizontal Stabilizer, Access Panel, Trailing Edge
343BB Horizontal Stabilizer, Access Panel - T.E. Area
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GUN 001-099, 101-122, 155, 157, 205, 207-999; GUN 156, 201-204, 206 POST SB 737-55A1080 (Continued)
SUBTASK 27-31-00-200-011
(6) Do a detailed inspection for security and condition of the elevator tab control mechanism and
elevator tab pushrod attachment.
(a) Make sure all hardware is installed and secure (TASK 27-31-34-400-802).
(b) Check for unusual wear or loose parts by lightly wiggling the pushrods.
SUBTASK 27-31-00-420-014
(7) Tighten and properly secure any loose items.
NOTE: If the nuts on the bolts that attach the elevator tab control rods to structure are loose,
they should be replaced and not re-torqued. Using new nuts will ensure that they have
the required run-on torque of 3.5 in-lb (0.4 Nm).
SUBTASK 27-31-00-960-006
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL飞机维护手册2(129)
