S 715-045
 (51)
 At the local cargo control panel 20R, hold the LOCAL DRIVE switch to the AFT position.

 S 215-324

 (52)
 Make sure the PDUs 19R1 and 19R2 move clockwise from the 45-degree retract position to the 0-degree fore-aft position.

 S 215-325

 (53)
 Make sure PDUs 19R1, 19R2 and 20R start to turn in the aft direction after PDUs 19R1 and 19R2 reach the 0-degree fore-aft position.

 S 715-326

 (54)
 Release the LOCAL DRIVE switch to the OFF position and make sure the PDUs do not continue to turn.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 K. Remote Cargo Control System Test
 S 715-046
 (1)  
At the master cargo control panel, M1, push the REMOTE CONTROL ON/OFF switch.

 S 215-306

 (2)  
Make sure the ON switch light comes on and the RIGHT SIDE MAIN DRIVE SELECT OFF switch light goes off.

 S 715-047

 (3)  
At the remote cargo control panel M10, make sure the CONTROL ACTIVE, RIGHT SIDE MAIN DRIVE SELECT OFF switch , and LEFT ENTRY DRIVE UNITS OFF switch lights come on.

 S 715-048

 (4)  
At the remote cargo control panel M10, push and hold the LAMP TEST switch.

 S 215-307

 (5)  
Make sure the switch lights on the panel M10 come on.

 S 715-308

 (6)  
Release the LAMP TEST switch and make sure these lights are the only lights on:

 (a)  
CONTROL ACTIVE

 (b)  
RIGHT SIDE MAIN DRIVE SELECT OFF switch

 (c)  
LEFT ENTRY DRIVE UNITS OFF switch.

 S 715-050
 (7)  
At the remote cargo control panel M10, hold the DRIVE CONTROL switch to the IN position.

 S 215-309

 (8)  
Make sure PDUs 19L1, 19L2, 19R1 and 19R2 move counterclockwise from the 0-degree fore-aft position to the 90-degree lateral position.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 S 215-310
 (9)  
Make sure all four PDUs start to turn in the inboard direction after all four PDUs reach the 90-degree lateral position.

 S 715-311

 (10)
 Release the DRIVE CONTROL switch to the OFF position and make sure the PDUs do not continue to turn.

 NOTE: PDUs 19L2, 19R1 and 19R2 complete their turn cycle
____
 before PDU 19L1 starts its cycle.

 S 715-051
 (11)
 At the remote cargo control panel M10, push the LEFT ENTRY DRIVE UNITS ON/OFF switch and make sure the OFF switch light comes on.

 S 715-052

 (12)
 At the remote cargo control panel M10, hold the DRIVE CONTROL switch to the IN position.

 S 215-312

 (13)
 Make sure the PDUs 19R1 and 19R2 start to turn in the inboard direction and PDUs 19L1 and 19L2 do not operate.

 S 715-313

 (14)
 Release the DRIVE CONTROL switch to the OFF position and make sure the PDUs do not continue to turn.

 S 715-049

 (15)
 At the remote cargo control panel M10, push the LEFT ENTRY DRIVE UNITS ON/OFF switch and make sure the ON switch light is on.

 S 715-053

 (16)
 At the remote cargo control panel M10, hold the DRIVE CONTROL switch to the IN position.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 25-57-00
 ALL  ú ú 14A Page 523 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
　
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