(e)
If the rig pins cannot be freely put in, make sure the condition that follows is satisfied: 1) Make sure that both levers on the control module are no
more than 0.03 inch (0.76 mm) farther than the index marks on the lever stop plate. 2) If the above condition is satisfied, but the rig pins cannot be put in freely, the adjustment is satisfactory.
(f)
Remove rig pins E/ST1 and E/ST2.
H.
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; Adjust the Body Cables (Fig. 502).
(1)
Do the steps that follow only if new cables were installed:
S 825-479
NOTE: See 20-10-3 for Control Cable Removal/Installation
____
instructions.
(a) Put in rig pins E/ST1 and E/ST2.
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MAINTENANCE MANUAL
(b) (c) Adjust the turnbuckles in cables ST1A, ST1B, ST2A, and ST2B to 270 | 10 lbs (1.20 +/- 0.04 KN).Adjust the turnbuckle as necessary to position the STAB TRIM levers as follows (Fig. 501): 1) The edge of each STAB TRIM control lever is no more than 0.50 inch (12.7 mm) farther than the edges of the position decal.
(d) While you do the adjustment, adjust all of the seals so that the cables do not bend.
(e) (f) (g) Remove rig pins E/ST1 and E/ST2.Operate the levers through full travel 25 times.Make sure the conditions that follow are correct: 1) The turnbuckles do not touch the pulley or quadrant flanges through full cable travel. 2) Cables are within 2 degrees of the plane of the pulley or quadrant. 3) Cables are installed through grommets and air pressure seals in the structure as necessary. 4) Cables are not moved from the rigged position or the position for normal operation by fairleads, rub strips, or grommets. 5) Pulleys turn freely with no blockage from the guards.
S 495-708
(2) Install rig pins E/ST1 and E/ST2.
S 825-480
(3) Adjust the tension in cables ST1A, ST1B, ST2A, and ST2B to the load specified in Figure 503.
S 215-481
(4) Make sure that the STAB TRIM control levers are in the adjustment limit position-decal.
S 095-482
(5) Remove rig pins E/ST1 and E/ST2.
S 865-483
(6) Operate the levers through one full cycle.
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757 MAINTENANCE MANUAL
S 865-484
(7)
Make sure the cable tension and lever positions are in the necessary limits as specified above.
S 495-485
(8)
Install clip locks on the turnbuckles.
S 625-486
(9)
Apply corrosion preventive compound to turnbuckle threads that show.
I.
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; Adjust the Limit Swtich, Position Transmitter Module, and the Travel Limit Mechanism (Fig. 502).
S 865-487
(1) Make sure that the stabilizer is set such that dimension B on the stabilizer jackscrew is 19.07 | 0.01 inches
(484.4 +/- 0.25 mm).
S 825-488
(2)
Adjust the tension in cables SL and SP to 50 | 5 lbs (222 +/- 22 newtons) such that rig pins E/ST1, E/ST3, E/ST4, and E/ST5 can be put in freely.
S 095-489
(3)
Remove rig pins E/ST1, E/ST3, E/ST4 and E/ST5.
S 865-490
(4)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:
(a)
11C13, STAB TRIM SHUTOFF RIGHT
S 865-491
(5) Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to NORM.
S 865-492
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES
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