(a)
Use the STAB TRIM control levers to move the stabilizer in the airplane nose up direction (stabilizer leading edge down).
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(b) Make sure that the travel limit mechanism stops the stabilizer. It should stop when the stop lugs on the lower end of the ballnut are 60 to 210 degrees from the stop lugs on the gearbox upper flange.
NOTE: One turn of the ballnut is equivalent to 0.625 inch
____ (15.87 mm) of axial movement along the ballscrew.
1) Adjust the turnbuckles on cables SLA and SLB until stabilizer stops in the necessary range.
(c)
Move the stabilizer in the airplane nose down direction (stabilizer leading edge up) until it is stopped by the travel limit shutoff.
(d)
Make sure that the stops on the top end of the ballscrew are between 60 to 210 degrees from the stop lugs on the top end of the ballnut. 1) Adjust the turnbuckles on cables SLA and SLB until the
above condition is correct.
S 495-504
(18)
Install clip locks on the turnbuckles.
S 625-505
(19)
Apply corrosion preventive compound to the turnbuckle threads that show.
S 095-506
(20)
Remove rig pins E/ST3, E/ST4, and E/ST5.
J.
AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; Adjust the Limit Switch and Position Transmitter Module (Fig. 502)
S 225-582
(1) Make sure that the stabilizer is set such that Dimension B on the stabilizer ballscrew actuator is 19.07 | 0.01 inches
(484.4 +/- 0.25 mm).
S 825-583
(2) Adjust the tension in cables SL and SP to 50 | 5 lbs (222 +/- 22 newtons) such that rig pins E/ST3, E/ST4, and E/ST5 can be put in freely.
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S 095-584
(3)
Remove rig pins E/ST3, E/ST4, and E/ST5.
S 865-585
(4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
(a)
11B19, STAB TRIM ALT
(b)
11C12, STAB TRIM SHUTOFF LEFT
(c)
11C13, STAB TRIM SHUTOFF RIGHT
S 865-586
(5)
Put the RIGHT and CENTER STAB TRIM SHUTOFF switches on the P10 panel to the NORM position.
S 865-587
(6)
Move the alternate stab trim switches forward until the stabilizer stops.
(a)
Make sure that the stabilizer-trim ballscrew-actuator upper-stop surfaces have not hit each other.
(b)
Make sure that Dimension B on the stabilizer-trim ballscrew-actuator is 24.86 to 25.46 inches (631.4-646.6 mm).
S 865-588
(7)
Move the alternate stab trim switches aft until the stabilizer stops.
(a)
Make sure that the stabilizer-trim ballscrew-actuator surfaces have not hit each other.
(b)
Make sure that Dimension B on the stabilizer-trim ballscrew-actuator is 0.80 to 1.40 inches (20-35 mm).
K.
Adjust Stabilizer-Trim Cutoff Switches (Fig. 504)
S 865-507
(1) Move the stabilizer such that dimension B on the stabilizer
jackscrew is 15.89 | 0.01 inches (403.6 +/- 0.25 mm).
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(2) S 865-508Remove the power from the right and center hydraulic systems (Ref 29-11-00).
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