S 715-039
(30)
At the master cargo control panel, M1, push the switch for the RIGHT SIDE ENTRY DRIVE UNITS NORMAL/RETRACT.
S 215-322
(31)
Make sure that these conditions occur:
-
The NORMAL light goes off
-
The IN TRANSIT light comes on
-PDUs 19R1 and 19R2 move counterclockwise from the 0-degree fore-aft position to the 45-degree retract position
-
the RETRACT light comes on
-
the IN TRANSIT light goes off.
S 715-323
(32)
Do the same steps again for the LEFT SIDE ENTRY DRIVE UNITS NORMAL/RETRACT.
S 715-040
(33)
At the master cargo control panel, M1, push each LEFT and RIGHT SIDE ENTRY DRIVE UNITS NORMAL/RETRACT switch.
S 215-295
(34)
Make sure the NORMAL switches and the IN TRANSIT lights are on.
S 715-041
(35)
At the master cargo control panel, M1, hold the DRIVE CONTROL switch to the OUT position.
S 215-296
(36)
Make sure PDUs 19L1, 19L2, 19R1 and 19R2 move counterclockwise from the 45-degree retract position to the 90-degree lateral position.
S 215-297
(37)
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 519 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 715-298
(38) 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 715-042
(39)
At the master cargo control panel, M1, push the switch for the RIGHT ENTRY DRIVE UNITS NORMAL/RETRACT.
S 215-320
(40)
Make sure that these conditions occur:
-
The NORMAL light goes off
-
The IN TRANSIT light comes on
-PDUs 19R1 and 19R2 do not turn but move clockwise from the 90-degree lateral position to the 45-degree retract position
-
The RETRACT light comes on
-
The IN TRANSIT light goes off.
S 715-321
(41)
Do the same steps again for the LEFT ENTRY DRIVE UNITS NORMAL/RETRACT.
S 715-456
(42)
At the master cargo control panel, M1, push each LEFT and RIGHT SIDE ENTRY DRIVE UNITS NORMAL/RETRACT switch.
S 715-457
(43)
Make sure the NORMAL switches and the IN TRANSIT lights are on.
S 715-299
(44)
At the local cargo control panel 20R, hold the LOCAL DRIVE switch to the AFT position.
S 215-300
(45)
Make sure the PDUs 19R1 and 19R2 move clockwise from the 90-degree lateral position to the 0-degree fore-aft position.
S 715-302
(46)
Release the LOCAL DRIVE switch to the OFF position and make sure the PDUs do not continue to turn.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
25-57-00
ALL ú ú 14A Page 520 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 715-044
(47)
At the local cargo control panel 20L, hold the LOCAL DRIVE switch to the AFT position.
S 215-303
(48)
Make sure PDUs 19L1 and 19L2 move clockwise from the 45-degree retract position to the 0-degree fore-aft position.
S 215-304
(49)
Make sure PDUs 19L1, 19L2 and 20L start to turn in the aft direction after PDUs 19L1 and 19L2 reach the 0-degree fore-aft position.
S 715-305
(50)
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.
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