(a)
11H17, FLT CONT SHUTOFF TAIL LEFT
M.
Rudder Ratio Changer Mechanism and Rudder PCAs - Adjustment
S 825-117
(1)
Pogo Rod for the Ratio Changer - Adjustment (Fig. 508)
(a)
Do these steps if you cannot easily install and remove rig pin R7 in the ratio changer pogo: 1) Loosen the jamnut at the bottom end of the pogo rod. 2) Adjust the length of the pogo rod until you can easily
install rig pin R7. 3) Tighten the jamnut and lock it with a wire. 4) Make sure you can see rod end threads in at least one-half
of the inspection hole for the pogo rod. 5) Remove rig pin R7.
S 825-010
(2)
Pogo Rod for the Yaw Damper - Adjustment (Fig. 507)
(a)
Do these steps if you cannot easily install and remove rig pin R8 in the yaw damper pogo: 1) Loosen the jamnut at the bottom end of the pogo rod.
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MAINTENANCE MANUAL
2) Adjust the length of the pogo rod until you can easily
install rig pin R8 in the yaw damper pogo. 3) Tighten the jamnut and lock it with a wire. 4) Make sure you can see rod end threads in at least one-half
of the inspection hole for the pogo rod. 5) Remove rig pin R8.
S 225-311
(3) Rudder Ratio Changer Actuator - Check
NOTE: Before this procedure is done, make sure the airplane is
____ stable at ambient air temperature |10.0 degrees F (|5.5 degrees C). Before adjustments or adjustment checks are made, make sure the temperature has been stable for at least one hour.
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
_______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
(a)
Disconnect the input rods for the top and bottom PCA input levers.
(b)
Supply pressure to the left hydraulic system only
(AMM 29-11-00/201).
(c)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel: 1) 11H17, FLT CONT SHUTOFF TAIL LEFT
(d)
Remove the DO-NOT-OPERATE tag and move the FLT CONTROL SHUTOFF L switch on the P61 panel to ON.
(e)
Move the left RRCM test switch to NORMAL and do these checks:
NOTE: The ratio changer will move to its low speed position.
____
1) Make sure the IN TEST light stays on for a maximum of 18 seconds. 2) After 30 seconds, make sure all the RRCM faultballs are black.
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MAINTENANCE MANUAL
3) Move the input levers for the top and bottom PCA fully clockwise at the same time then release.
NOTE: This is to release unwanted hydraulic pressure
____ and will let the rudder position become stable.
(f) Do these steps if the rudder trailing edge is more than 0.20 inch away from its neutral position: 1) Loosen the jamnut on the input rod for the middle PCA. 2) Do these steps to move the rudder to a position that is
right of neutral approximately 0.50 inch (12.7 mm): a) Manually move then hold the input levers for the top and bottom PCAs in their full clockwise positions.
NOTE: This will remove the unwanted hydraulic pressure
____ from the top and bottom PCAs.
Continue to hold the top and bottom PCAs while you adjust the middle PCA to move the rudder in the right direction.
b) Adjust the middle PCA input rod until the rudder is approximately 0.50 inch (12.7 mm) to the right of its neutral position.
NOTE: Each of the two rod end bearings of the in-
____ put rod has right hand threads. To make the length of the input rod shorter (move the rudder trailing edge to the right), turn the body tube in the rod end of the large diameter thread. To make the length of the input rod longer (move the rudder trailing edge to the left), turn the body tube in the rod end of the small diameter thread.
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