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ELEVATOR TAB CONTROL MECHANISM - REMOVAL/INSTALLATION
1. General
A. This procedure has these tasks:
(1) A removal of the elevator tab control mechanism
(2) An installation of the elevator tab control mechanism
(3) A removal of the tab pushrod
(4) An installation of the tab pushrod.
(5) A removal of the elevator tab lock actuator.
(6) An installation of the elevator tab lock actuator.
B. The elevator tab control mechanism is referred to as the "tab mechanism" in this procedure.
C. The tab mechanism includes the crank assembly and two tab pushrods.
D. This procedure is applicable to the left and right tab mechanism.
TASK 27-31-34-000-802
2. Elevator Tab Control Mechanism - Removal
(Figure 401)
GUN 156, 201-204, 206 PRE SB 737-55A1080
NOTE: Also see Figure 402, Figure 404 and Figure 407.
GUN 001-099, 101-122, 155, 157, 205, 207-999; GUN 156, 201-204, 206 POST SB 737-55A1080
NOTE: Also see Figure 403, Figure 405 and Figure 408.
GUN ALL
A. References
Reference Title
27-31-00-800-802 Remove Pressure from the Elevator Hydraulic Systems A and B
(P/B 201)
B. Location Zones
Zone Area
318 Tail Cone Compartment - Right
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
318BR Tailcone Access Door
333BB Horizontal Stabilizer, Access Panel, Trailing Edge
343BB Horizontal Stabilizer, Access Panel - T.E. Area
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-31-34
Page 401
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
D. Prepare for the Removal
SUBTASK 27-31-34-860-003
(1) Remove pressure from the elevator hydraulic systems A and B. To remove it, do this task:
Remove Pressure from the Elevator Hydraulic Systems A and B, TASK 27-31-00-800-802.
SUBTASK 27-31-34-700-001
(2) Measure and record the elevator tab position in relation to the elevator.
NOTE: This will make it easier to adjust the tab after installing the mechanism.
SUBTASK 27-31-34-010-004
(3) To get access to the aft control quadrant, do this task:
Remove this access panel:
Number Name/Location
318BR Tailcone Access Door
SUBTASK 27-31-34-010-005
(4) For the left elevator, remove this access panel:
Number Name/Location
333BB Horizontal Stabilizer, Access Panel, Trailing Edge
SUBTASK 27-31-34-010-006
(5) For the right elevator, remove this access panel:
Number Name/Location
343BB Horizontal Stabilizer, Access Panel - T.E. Area
E. Elevator Tab Control Mechanism Removal
SUBTASK 27-31-34-020-005
(1) Disconnect hydraulic line [31] from the tab mechanism [32].
SUBTASK 27-31-34-020-006
(2) Disconnect the electrical line [30] from the tab mechanism [32].
GUN 156, 201-204, 206 PRE SB 737-55A1080; AIRPLANES WITH FOUR ELEVATOR TAB HINGES
SUBTASK 27-31-34-020-007
(3) Remove the tab mechanism [32]:
(a) Remove the screws [48] from the pin retainer [49].
(b) Remove the nuts [52], washers [51], bushings [50], and pin assembly [40] that attach the tab
mechanism [32] to the elevator [21].
(c) Remove the nuts [47], washers [46], and bolts [41] from the tab mechanism [32] and tab
pushrods [29].
(d) Remove the nut [45], washer [44], washer [43], and pin assembly [42] that attach the tab
mechanism [32] to the elevator [21].
(e) Remove the nuts [37], washers [36], nuts [35], washers [34], bushings [38], and bolts [39]
that attach the tab mechanism [32] to the horizontal stabilizer [33].
(f) Remove the tab mechanism [32] from the airplane.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-31-34
Page 402
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
GUN 156, 201-204, 206 PRE SB 737-55A1080; AIRPLANES WITH FOUR ELEVATOR TAB HINGES
(Continued)
GUN 001-099, 101-122, 155, 157, 205, 207-999; GUN 156, 201-204, 206 POST SB 737-55A1080;
AIRPLANES WITH THE SIX HINGE ELEVATOR TAB WITH RECTANGULAR HEAD BOLTS
SUBTASK 27-31-34-020-016
(4) Remove the tab mechanism [32]:
(a) Remove the screws [48] from the pin retainers [49] rotate the pin retainer [49] arms up.
(b) Remove the nuts [52], washers [51], and pin assembly [40] that attach the tab mechanism
[32] to the elevator [21].
(c) Remove the nuts [47], washers [46], spacers [53], and bolts [41] that attach the tab
pushrods [29] to the tab mechanism [32].
　
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