S 725-351
(3)
Do the steps that follow to make sure the control column and the aft quadrant override operate correctly:
(a)
Install the aft quadrant rigging block (Elevator is at Neutral) in the first officer's aft quadrant to hold the quadrant in the neutral position (Fig. 511).
NOTE: Rig pins are not applicable blocking tools.
____
(b)
Install a control column lock in the first officer's control column (Fig. 512).
(c)
Put a 6-inch (150 mm) strip of adhesive tape vertically on the right elevator index plate (Fig. 505).
(d)
Make a mark on the tape that shows the up direction.
(e)
Make a mark where the upper surface of the right elevator trailing edge would extend to the tape.
(f)
Use the control wheel adapter equipment to attach the force gage to the captain's control column at the finger reference point (Fig. 505).
(g)
Slowly pull the control column aft until there is a force of 70 | 1 pounds (311 | 4 newtons).
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MAINTENANCE MANUAL
(h)
Make a mark on the tape at the right elevator up position.
(i)
Let the control column go to the neutral position.
(j)
Use the force gage to slowly push the captain's control column forward until there is a force of 70 | 1 pounds (311 | 4 newtons).
(k)
Make a mark on the tape at the right elevator down position.
(l)
Let the control column go to the neutral position.
(m)
Make sure that the elevator up and down position marks are less than 0.50 inch (12.7 mm) away from the right elevator reference position mark.
(n)
Do the steps that follow if travel in the up or down direction is more than 0.50 inch (12.7 mm): 1) Make sure that the aft quadrant is held in the neutral
position and cannot move. 2) Make a mark at the elevator trailing edge position on the tape again. 3) Use the force gage as specified above to make marks at the elevator up and down positions again.
4) Make sure the elevator up and down position marks are less than 0.50 inch (12.7 mm) away from the right elevator reference position mark.
(o) Measure and make a mark on the tape that is 2.10 inches
(53.3 mm) above the upper mark.
(p) Measure and make a mark on the tape that is 2.10 inches
(53.3 mm) below the lower mark.
(q)
Remove the tape from the right elevator index plate and put it on the left elevator index plate.
(r)
Make sure the middle mark on the tape is in line with the upper surface of the left elevator trailing edge.
(s)
Use the force gage to slowly pull the captain's control column aft until the left elevator goes above the highest mark on the tape.
(t)
Make sure that the control column force is 70 to 90 pounds (311 to 400 newtons).
(u)
Let the control column go to the neutral position.
(v)
Slowly push the captain's control column forward until the left elevator trailing edge goes below the lowest mark on the tape.
(w)
Make sure that the control column force is 70 to 90 pounds (311 to 400 newtons).
(x)
Let the control column go to the neutral position.
S 865-340
(4)
Put the Airplane Back to its Usual Condition.
(a)
Remove the aft quadrant rigging block from the first officer's aft quadrant.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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ALL ú ú 10 Page 572 ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
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