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right elevator control pushrod [28] from the elevator bus crank [22].
(b) Loosen the checknut [29] on the right elevator pushrod [28].
(c) Adjust the elevator control pushrod [28] until the elevator is in the full down position with
PCUs bottomed.
NOTE: One half turn of the elevator control pushrod [28] is equal to 0.20 inch (5.1 mm) at
the elevator trailing edge.
(d) Install the bolt [23], washers [24] (under the nut), nut [25] (Figure 504).
1) Tighten the nut [25] by hand.
SUBTASK 27-31-00-980-002
(3) Push down on the trailing edge of the left elevator, to bottom out of the elevator PCU’s in the
extended position.
SUBTASK 27-31-00-820-016
(4) Make sure the left elevator is in the full down position with the inboard end of the elevator
trailing edge 10.84 +0.09/-0.32 inches (275.3 +2.3/-8.1 mm) from the elevator neutral index mark
(Figure 523).
(a) Remove the nut [27], washer [26], nut [25], washers [24], and bolt [23] to disconnect the left
elevator control pushrod [28] from the elevator bus crank [22].
(b) Loosen the checknut [29] on the left elevator control pushrod [28].
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(c) Adjust the elevator control pushrod [28] until the elevator is in the full down position with
PCUs bottomed.
NOTE: One half turn of the elevator control pushrod [28] is equal to 0.20 inch (5.1 mm) at
the elevator trailing edge (Figure 505).
(d) Install the bolt [23], washers [24] (under the nut), nut [25] (Figure 504).
1) Tighten the nut [25] by hand.
SUBTASK 27-31-00-970-005
(5) Make sure the final position of the left elevator is +/- 0.12 inch (+/- 3.0 millimeters) of the final
position of the right elevator.
(a) If it is necessary, re-adjust the right elevator to 10.84 +0.09/-0.32 inches (275.3 +2.3/-8.1
mm) from the index plate (Figure 523).
SUBTASK 27-31-00-420-003
(6) Tighten the checknuts [29] on the left and right elevator pushrods [28] to 750 - 900 pound-inches
(84.8 - 101.7 newton-meters).
(a) Install the lockwire, G01912 on the checknuts [29].
SUBTASK 27-31-00-420-004
(7) Tighten the nuts [25] to 500 - 600 pound-inches (56.5 - 67.8 newton-meters).
SUBTASK 27-31-00-420-005
CAUTION: DO NOT TRY TO TIGHTEN THE NUT [25] AGAIN AFTER YOU TIGHTEN THE NUT [27],
YOU CAN CAUSE DAMAGE TO EQUIPMENT.
(8) Install the washers [26] and nuts [27].
(a) Tighten the nuts [27] to 150 - 220 pound-inches (17.0 - 24.9 newton-meters).
SUBTASK 27-31-00-860-124
(9) Release the elevator PCUs from their extended position.
I. Put the Airplane Back to Its Usual Condition
SUBTASK 27-31-00-410-002
(1) Install this access panel:
Number Name/Location
318BR Tailcone Access Door
SUBTASK 27-31-00-940-003
(2) Close this access panel:
Number Name/Location
311BL Stabilizer Trim Access Door
SUBTASK 27-31-00-860-024
(3) Do this task: Elevator Hydraulic System A and B - Pressurization, TASK 27-31-00-800-801.
------------------------- END OF TASK ---------------------------
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Elevator Pushrods Adjustment
Figure 504 (Sheet 1 of 2)/27-31-00-990-806
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Elevator Pushrods Adjustment
Figure 504 (Sheet 2 of 2)/27-31-00-990-806
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Elevator Tab Adjustment
Figure 505/27-31-00-990-807
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TASK 27-31-00-820-803
8. Input Rods of the Elevator Power Control Unit - Adjustment
(Figure 502, Figure 503, Figure 505, Figure 506)
A. General
(1) Use this test to adjust the two input rods (primary and secondary) of the right and left elevator
power control units (PCUs).
NOTE: For this procedure, the primary input rod is on the left and the secondary input rod is on
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL飞机维护手册2(138)
