(e)
Give a load to the dial indicator until the needle moves to approximately mid-travel.
(f)
Adjust the dial indicator to zero.
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A
757
MAINTENANCE MANUAL
S 496-039
CAUTION: USE SUFFICIENT PADDING ON THE FORCE SCALE TO PREVENT DAMAGE TO
_______ THE RUDDER SURFACE. USE A PAD THAT IS AT LEAST 5 INCHES
(12.7 cm) LONG AND HAS A WIDTH OF AT LEAST 5 INCHES (12.7 cm).
(3) Use the force scale to apply a 30 | 3 pound force
(133.4 +/- 13.3 newtons) to the left side of the rudder. Apply this force on the rudder rib opposite the middle PCA and 1 to 2 inches
(25.4 to 50.8 mm) forward of the trailing edge.
NOTE: Use the horizontal row of fasteners on the rudder skin to
____
identify the rib.
S 226-040
(4)
Keep the force constant until the dial indicator value becomes stable.
S 226-041
(5)
Keep a written record of the distance the rudder trailing edge moves.
S 866-073
(6)
Slowly remove the load from the left side of the rudder.
NOTE: Do not adjust the dial indicator to zero even if it does
____
not return to the original zero.
S 496-074
CAUTION: USE SUFFICIENT PADDING ON THE FORCE SCALE TO PREVENT DAMAGE TO
_______ THE RUDDER SURFACE. USE A PAD THAT IS AT LEAST 5 INCHES
(12.7 cm) LONG AND HAS A WIDTH OF AT LEAST 5 INCHES (12.7 cm).
(7) Use the force scale to apply a 30 | 3 pound force
(133.4 +/- 13.3 newtons) to the right side of the rudder. Apply this force on the rudder rib opposite the middle PCA and 1 to 2 inches (25.4 to 50.8 mm) forward of the trailing edge.
NOTE: Use the horizontal row of fasteners on the rudder skin to
____
identify the rib.
S 226-043
(8) Keep the force constant until the dial indicator value becomes stable.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 226-044
(9)
Keep a written record of the distance the rudder trailing edge moves.
S 226-045
(10)
Add the distance the rudder moved left to the distance it moved right and do this step:
(a)
Make sure the total distance the rudder moved is not more than
0.40 inch (10.1 mm)
NOTE: The rudder movement for a new airplane is approximately
____ 0.23 inches (5.84 mm) (this is a satisfactory value for the rudder movement). If the measured movement is less than this value, make sure only one of the three PCAs has power.
1) If the rudder movement is more than 0.40 inch (10.16 mm), examine the PCA rod ends, the hinge bearings, and the reaction link bearing for too much wear.
S 866-075
(11)
Remove the 30 pound force (133.4 newtons).
S 226-099
(12)
Do the freeplay check again and do these checks:
(a)
Make sure the dial indicator base did not move.
(b)
Make sure the last measurement is approximately the same as the first.
S 866-046
(13)
Remove the power from the hydraulic system that was pressurized (Ref 29-11-00/201).
S 866-076
(14)
Move the applicable FLT CONTROL SHUTOFF L, R, or C switch on the P61 panel to OFF. Attach a DO-NOT-OPERATE tag and make sure the switch position light comes on.
NOTE: Make sure all the switches are in their OFF positions.
____
S 216-100
(15)
Make sure these circuit breakers on the P11 panel are open:
(a)
11H17, FLT CONT SHUTOFF TAIL LEFT
(b)
11H18, FLT CONT SHUTOFF TAIL CTR
(c)
11H28, FLT CONT SHUTOFF TAIL RIGHT
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