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 25-57-02
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A

747-400 MAINTENANCE MANUAL
GALLEY COMPLEX (REF) 19R1
20R 21R
19R2
19L2
20L 21L
19L1
SIDE CARGO
ENTRY DOOR
DOOR
NO. 4 (REF)
(REF)
STEERABLE PDU
ACTUATOR
A
ROLLER
PINION GEAR
A
STRUCTURE (REF)
STEERING ACTUATOR
BOLT, NUT AND WASHER FASTENER ELECTRICAL
(4 PLACES) (4 PLACES) CONNECTOR STEERING ACTUATOR
ELECTRICALLY STEERABLE PDU
A
PDU Steering Actuator Installation Figure 401
STEERABLE POWER DRIVE UNIT
SEE A
22R 23R 24
22L ENTRY DOOR NO. 5 (REF)
ACTUATOR ROLLER
PINION GEAR
A-A
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 S 024-010
 (4)  Remove the actuator.
 TASK 25-57-02-404-005
 3.  PDU Steering Actuator Installation (Fig. 401)__________________________________
 A. References
 (1)  AMM 25-57-01/401, Power Drive Units
 B. Access
 (1)  Location Zone
 210 Main Deck

 C. Procedure
 S 424-006
 (1)  
Hold the actuator in its position on the structure while you install the four bolts, washers, and nuts.

 S 434-007

 (2)  
Connect the electrical connector plug to the actuator. ~.................................................... | | STEERING | ELECTRICAL | | PDU | ACTUATOR | CONNECTOR | ...................................................... | 23R | M337 | DM337 | ...................................................... | 24 | M153 | DM153 | 2..........…......................…..................1

 S 414-008

 (3)  
Install the steerable PDU which you removed to get access to the actuator (AMM 25-57-01/401).

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747-400 MAINTENANCE MANUAL
 RETRACTABLE SIDE DOOR SILL ROLLER/CASTER AND GUIDE ASSEMBLY-
____________________________________________________________ REMOVAL/INSTALLATION
____________________
 1.  General_______
 A.  There are four tasks in this procedure. The first task gives instructions to remove the retractable side door sill roller/caster and guide assembly (referred to as the sill assembly) . The second task gives instructions to install the sill assembly. The third task gives instructions to do an inspection/check of the sill assembly. The fourth task gives instructions to do an adjustment of the sill assembly.
 B.  The sill assembly is in the opening of the side cargo door. The sill assembly has a forward sill and an aft sill. Each sill has an inboard sill and an outboard sill. The outboard sills fold on the top of the inboard sills. The sill assembly has rollers, casters, and retractable side guides. The retractable side guides must be retracted before you can fold the outboard sills.
 TASK 25-57-03-004-001
 2.  Sill Assembly Removal (Fig. 401)_____________________
 A.  References
 (1)
25-58-02/401, Outboard Guide/Restraint Rails

 (2)
52-32-00/001, Side Cargo Door

 (3)
52-32-16/401, Side Cargo Door Safety Strut

 B.  Access
 (1)  Location Zone
 210 Main Deck

 C.  Prepare for the Removal
 S 014-016
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR AND
_______ THE DOOR OPENING WHEN YOU OPERATE THE DOOR. FAILURE OF THE LIFT MECHANISM COULD CAUSE THE DOOR TO CLOSE QUICKLY WHICH COULD CAUSE INJURY OR DAMAGE.
　
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