EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 25-57-00
 ALL  ú ú 15A Page 516 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 715-033
 (10)
 At the master cargo control panel, M1, hold the LOCAL DRIVE switch to the FWD position.

 S 215-278

 (11)
 Make sure the PDUs 19L1 and 19L2 move clockwise from the 90-degree lateral position to the 0-degree fore-aft position.

 S 715-280

 (12)
 Release the LOCAL DRIVE switch to the OFF position and make sure the PDUs do not continue to turn.

 NOTE: PDU 19L1 completes its turn cycle before PDU 19L2
____
 starts its cycle.

 S 715-034
 (13)
 At the local cargo control panel 19R, hold the LOCAL DRIVE switch to the FWD position.

 S 215-281

 (14)
 Make sure the PDUs 19R1 and 19R2 move clockwise from the 90-degree lateral position to the 0-degree fore-aft position.

 S 715-283

 (15)
 Release the LOCAL DRIVE switch to the OFF position and make sure the PDUs do not continue to turn.

 S 715-035

 (16)
 At the master cargo control panel, M1, hold the DRIVE CONTROL switch to the OUT position.

 S 215-284

 (17)
 Make sure the PDUs 19L1, 19L2, 19R1 and 19R2 move counterclockwise from the 0-degree fore-aft position to the 90-degree lateral position.

 S 215-285

 (18)
 Make sure all four PDUs start to turn in the outboard direction after all four PDUs reach the 90-degree lateral position.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 25-57-00
 ALL  ú ú 15A Page 517 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 715-286
 (19) 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 715-036
 (20)
 At the master cargo control panel, M1, hold the DRIVE CONTROL switch to the IN position.

 S 215-287

 (21)
 Make sure the PDUs 19L1, 19L2, 19R1 and 19R2 start to turn in the inboard direction.

 S 715-288

 (22)
 Release the DRIVE CONTROL switch to the OFF position and make sure the PDUs do not continue to turn.

 S 715-037

 (23)
 At the local cargo control panel 20L, hold the LOCAL DRIVE switch to the AFT position.

 S 215-289

 (24)
 Make sure the PDUs 19L1 and 19L2 move clockwise from the 90-degree lateral position to the 0-degree fore-aft position.

 S 215-290

 (25)
 Make sure the PDUs 19L1, 19L2 and 20L do not turn until after PDUs 19L1 and 19L2 reach the 0-degree fore-aft position.

 S 715-291

 (26)
 Release the LOCAL DRIVE switch to the OFF position and make sure the PDUs do not continue to turn.

 NOTE: PDU 19L1 completes its turn cycle before PDU 19L2
____
 starts its cycle.

 S 715-038
 (27) At the local cargo control panel 20R, hold the LOCAL DRIVE switch to the AFT position.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 25-57-00
 ALL  ú ú 13A Page 518 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 215-292
 (28)
 Make sure the PDUs 19R1 and 19R2 move clockwise from the 90-degree lateral position to the 0-degree fore-aft position.

 S 715-294

 (29)
 Release the LOCAL DRIVE switch to the OFF position and make sure the PDUs do not continue to turn.
　
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