S 865-349
(9)
Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags:
(a)
11B19 or 11A19, STAB TRIM ALT (IF INSTALLED)
(b)
11C12, STAB TRIM SHUTOFF LEFT
(c)
11C13, STAB TRIM SHUTOFF RIGHT
(d)
11H11 or 11C05, STAB TRIM CONT L
(e)
11H20, STAB TRIM CONT R
F.
Control Column Travel Test
S 215-100
(1) Make sure that the left and center hydraulic systems are pressurized
(AMM 29-11-00/201).
S 215-101
(2) Make sure that Dimension B on the stabilizer ballscrew actuator is
15.89 | 0.01 inches (403.6 | 0.3 mm) (Fig. 502).
S 725-005
(3) Do the steps that follow to make sure the control column operates
correctly:
(a) Shake the captain's control column forward and aft quickly to
make sure the control column is at neutral, then release.
(b) Use a control surface protractor to make a mark of the column's
neutral position.
(c) Push the captain's control column forward to the column stop.
(d) Make sure that the angle from the neutral column position to
the forward stop is at least 8.90 degrees (Fig. 505).
NOTE: Approximately a 55-pound (245 newton) push is necessary
____
to make sure the column touches the stop.
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(e)
(f)
(g)
(h)
757 MAINTENANCE MANUAL
Pull the captain's control column aft to the column stop.Make sure that the angle from the neutral column position to the aft stop is at least 13.00 degrees.
NOTE: Approximately a 65-pound (290 newton) pull is
____ necessary to make sure that the column touches the stop.
Let the control column go to the neutral position.
Do the steps that follow to make sure the control column travel
with the stabilizer at its limits of travel are correct:
1) Remove the DO-NOT-CLOSE tags and close these circuit
breakers on the P11 panel:
a) 11B19, STAB TRIM ALT (IF INSTALLED)
b) 11C12, STAB TRIM SHUTOFF LEFT
c) 11C13, STAB TRIM SHUTOFF RIGHT
2) Put the RIGHT and CENTER STAB TRIM SHUTOFF valve switches on the P10 panel to the NORM position.
3) AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; use the STAB TRIM levers to move the horizontal stabilizer in the airplane nose down direction until the stabilizer stops.
4) AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; use the alternate stab trim switches to move the horizontal stabilizer in the airplane nose down direction until the stabilizer stops.
5) Turn the captain's control wheel full clockwise and hold. 6) Move the captain's control column to the forward stop, to
the aft stop and to the neutral position. 7) Let the control wheel go to its neutral position. 8) Make sure that the control column moves smoothly and freely
through full travel. 9) Turn the captain's control wheel full counterclockwise and hold. 10) Move the captain's control column to the forward stop, to the aft stop and to the neutral position.
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A
757 MAINTENANCE MANUAL
11) Let the control wheel go to its neutral position. 12) Make sure that the column moves smoothly and freely through full travel.
13) AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; use the STAB TRIM levers to move the horizontal stabilizer in the airplane nose up direction until the stabilizer stops.
14) AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; use the alternate stab trim switches to move the horizontal stabilizer in the airplane nose up direction until the stabilizer stops.
15) Make sure that the control columns move smoothly and freely through full travel.
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