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Number Name/Location
344PT Horizontal Stabilizer, Tab Control Rod Fairing,
Elevator Sta 34.0
SUBTASK 27-31-00-860-036
(6) Use the bar, SPL-1677 to set the "B" dimension at 4 units of trim (39.89 +/- 0.01 inches or 1013.2
+/- 0.3 mm) (Figure 502).
G. Elevator Tab Pushrods Adjustment
GUN 156, 201-204, 206 PRE SB 737-55A1080
NOTE: See Figure 508 or Figure 509.
GUN 001-099, 101-122, 155, 157, 205, 207-999; GUN 156, 201-204, 206 POST SB 737-55A1080
NOTE: See Figure 510.
GUN ALL
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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SUBTASK 27-31-00-020-002
(1) Loosen the four checknuts [103] and checknuts [105] from the tab pushrods [110].
SUBTASK 27-31-00-860-037
(2) Push the elevator trailing edge full up by hand.
SUBTASK 27-31-00-860-038
(3) While you move the elevator trailing edge down, align the center of the elevator trailing edge
with the index mark in +/- 0.04 inch (+/- 1.0 mm), or less (Figure 505).
NOTE: Keep the elevators at this position while you measure and adjust the tab pushrods. If
the elevator position is changed, you must put the elevator trailing edge at the full up
position and do this step again before you continue.
SUBTASK 27-31-00-480-005
(4) Install the fixture, SPL-1686 (Figure 512):
(a) To use the fixture, SPL-1686, do the steps that follow:
1) Move the digital micrometer to the bottom of the slide.
2) Push the button on the micrometer to zero the micrometer reading.
3) Move the digital micrometer up until it gives the same reading as the calibration value
stamped on the side of the tool.
NOTE: This brings the pointer on the micrometer up to approximately 0.3 inch (8
millimeters) below the trailing edge of the elevator tab.
4) Push the button on the micrometer to zero the micrometer reading.
GUN 156, 201-204, 206 PRE SB 737-55A1080; AIRPLANES WITH FOUR ELEVATOR TAB HINGES
(b) Install the fixture, SPL-1686 below the elevator and elevator tab at the second elevator tab
hinge (from inboard).
GUN 001-099, 101-122, 155, 157, 205, 207-999; GUN 156, 201-204, 206 POST SB 737-55A1080;
AIRPLANES WITH SIX HINGE ELEVATOR TABS
(c) Install the fixture, SPL-1686 below the elevator and elevator tab at the third elevator tab
hinge (from inboard).
GUN ALL
(d) Make sure the cross bar on the fixture, SPL-1686 touches the lower surface of the elevator
trailing edge.
SUBTASK 27-31-00-820-007
(5) Adjust the tab pushrods [110] until the gap between the elevator tab trailing edge and the fixture,
SPL-1686 (dimension X) is 0.36 +/- 0.01 inch (9.1 +/- 0.3 mm) (Figure 512).
NOTE: You may need to do a coarse adjustment of the elevator tab pushrods if the gap
between the elevator tab trailing edge and the fixture is too much.
You must always do a fine adjustment of the elevator tab pushrods if dimension X is not
in the tolerance.
NOTE: While adjusting the elevator tab pushrods, the number of threads showing on the
elevator tab pushrod ends should be approximately equal to the number of threads
showing on the bushing [104].
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SUBTASK 27-31-00-820-008
(6) If it is necessary, do this coarse adjustment of the elevator tab pushrods by turning the tab rod
ends (Figure 510):
(a) Remove the pins [111], nuts [109], washers [108], bolts [106], and bushings [107] from the
tab pushrods [110].
(b) Turn the tab pushrod ends until the distance between the elevator tab trailing edge and the
fixture, SPL-1686 (dimension X) is approximately 0.36 inch (9.1 mm).
NOTE: One half turn of the tab pushrod end is equal to 0.1 inch (3 mm) at the elevator tab
trailing edge.
(c) Install the bushings [107], bolts [106], washers [108], and nuts [109] to connect the tab
pushrods [110] to the elevator tab [102].
NOTE: The inboard bolt is installed with the head inboard and the outboard bolt is
installed with the head outboard
NOTE: If you loosened or removed the nuts [109], they need to be replaced and not reinstalled.
Using new nuts will ensure that they have the required run-on torque of
3.5 in-lb (0.4 Nm).
GUN 156, 201-204, 206 PRE SB 737-55A1080; AIRPLANES WITH FOUR ELEVATOR TAB HINGES
SUBTASK 27-31-00-820-009
(7) Do this fine adjustment of the elevator tab pushrods (Figure 508 or Figure 509):
(a) Turn the bushing [104] to adjust the length of the tab pushrods [110].
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL飛機維護手冊2(144)
