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MAINTENANCE MANUAL
C. Parts ~.............................................................................. | AMM | | AIPC | ................. ...........................| | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG| ITEM | ...............................................................................| | 401 | 6 | Actuator | 27-21-15 | 02 | 280 | | | 10 | Shim | | |760,765 | | | 11 | Bolt | | | 130 | | | 12 | Washer | | | 135 | | | 20 | Bolt | | | 210 | | | 21 | Cap | | | 160 | | | 22 | Screw - Cap | | | 150 | | | 23 | Washer | | | 155 | | | 24 | Housing - Assy. | | | 175 | | | 27 | Bushing | | | 180 | | | 28 | Washer | | | 195 | | | 29 | Bolt | | | 185 | | | 30 | Nut | | | 200 | | | 33 | Support Assembly | | | 240 | | | 34 | Washer | | | 215 | | | 35 | Bushing | | | 235 | | | 36 | Bolt | | | 213 | | | 37 | Washer | | | 215 | | | 38 | Washer | | | 225 | | | 39 | Collar | | | 230 | | | | | | | | 2......…........…...................................…...........…....….........1
D. References
(1)
AMM 27-21-15/501, Upper Rudder Power Control Actuator
E.
Access
(1)
Location Zone 324 Vertical Stabilizer, Rear Spar to Trailing Edge 326 Upper Rudder
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747-400 MAINTENANCE MANUAL
F. Procedure
S 494-026
(1)
Do these steps to install the rudder clamp, and remove the rudder actuator lock (referred to as the lock):
(a)
Make sure the lower rudder is aligned with the upper rudder.
(b)
Install the rudder clamp between the upper and the lower rudder approximately two inches from the trailing edge.
(c)
Remove the pin that connects the lock to the rudder.
(d)
Remove the four bolts that attach the lock to the pillow block (3).
(e)
Remove the lock from the airplane.
S 224-027
(2)
Examine the parts that attach the actuator for worn areas.
S 864-028
(3)
Retract the center actuator (6).
S 424-029
(4)
Use the fishhpole hoist and the hoist frame equipment to install the center actuator (6):
(a)
Install the shim (10) on the pillow block (3).
NOTE: Install the same shim (10) that you removed from this
____ location. If a replacement shim is necessary, measure the thickness of the used shim (10). Remove the laminations on the new shim until it has the same thickness.
(b)
Put the actuator in its position on the pillow block (3) with the hydraulic ports on the right side.
CAUTION:_______INSTALL A NEW WASHER (12) AT ALL FOUR BOLTS (11). IF YOU TIGHTEN A BOLT AND THEN LOOSEN IT, YOU MUST REPLACE THE WASHER. THE TORQUE ON THE BOLTS CAN BE INCORRECT IF YOU INSTALL USED WASHERS.
(c)
Install the new torque indication washer (12) with the countersink to the head of the bolt (11).
(d)
Install the four bolts (11).
(e)
Tighten the bolts (11) until you cannot turn the center of the torque indication washers (12) by hand.
(f)
Remove the caps from the hydraulic ports.
(g)
Make sure the bolt assembly (29) is assembled correctly:
1) Make sure the cap (21), cap screws (22), washer (23) and housing assembly are installed.
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2) Make sure the lockwire is installed on the cap screws (22).
(h) Install the bushing (27) on the bolt assembly (29):
1) Apply the adhesive to the bushing (27).
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