S 865-619
(13)
Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to the CUTOUT position.
S 225-620
(14)
Make sure that Dimension B on the stabilizer ballscrew is 24.86 to
25.46 inches (631.4-646.6 mm) (Fig. 502).
S 865-621
(15)
Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to the NORM position.
S 865-622
(16)
Move the alternate stab trim switches aft (airplane nose up) and hold the switches aft until the stabilizer stops.
S 865-623
(17)
Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to the CUTOUT position.
S 225-624
(18)
Make sure that Dimension B on the stabilizer ballscrew is 0.80 to
1.40 inches (20-35 mm).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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757
MAINTENANCE MANUAL
J. Stabilizer Trim Cutoff Switch Test (Fig. 504)
NOTE: The stabilizer may not be in electrical control range if it
____ does not move when the stabilizer-trim control-wheel-switches are moved in one direction. Move the stabilizer-trim control-wheel-switches in the other direction to move the stabilizer into electrical control range, then continue with test.
S 865-803
(1)
Move the flaps to the fully retracted position (Ref 27-51-00).
S 865-804
(2)
Put the CENTER STAB TRIM SHUTOFF switch on the P10 panel to NORM.
S 865-805
(3)
Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to CUTOUT.
S 495-672
(4)
Install the adapter equipment with the protractor kit to the captain's control wheel (Fig. 505).
S 865-806
(5)
Move the captain's stabilizer-trim control-wheel-switches up (airplane nose down) and hold until the stabilizer stops.
S 865-807
(6)
Do the steps that follow to prevent the operation of the first officer's stabilizer-trim cutoff switches:
(a)
Open the forward compartment access door, 113AL (Ref 06-41-00).
(b)
Install an elastic cord (or other applicable device) around the lower ends of each set of opposite switch actuating arms.
(c)
Add sufficient tension to make a space between the switch-actuating-arms and the switch levers. The switch-actuating-arm cam rollers should be away from the control column cam-surface.
S 865-808
(7)
Move the captain's stabilizer-trim control-wheel-switches down (airplane nose up).
(a)
Make sure the stabilizer moves.
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757
MAINTENANCE MANUAL
S 865-809
(8) While the switches are held down, slowly push the control column forward until the stabilizer stops.
NOTE: Do this step while the stabilizer indicated position is
____
between 5.0 and 15.5 units of trim.
S 225-810
(9)
Measure the angle of travel of the control column from the neutral position to the point where the stabilizer stops. The angle of travel should be 3.5 to 4.0 degrees.
S 865-811
(10)
Release the stabilizer-trim control-wheel-switches.
S 865-812
(11)
Let the control column go to the neutral position.
S 865-813
(12)
Put the CENTER STAB TRIM SHUTOFF switch to CUTOUT.
S 865-814
(13)
Put the RIGHT STAB TRIM SHUTOFF switch to NORM.
S 865-815
(14)
Move the captain's stabilizer-trim control-wheel-switches down (airplane nose up).
(a)
Make sure the stabilizer moves.
S 865-816
(15) While the switches are held down, slowly push the control column forward until the stabilizer stops.
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