S 215-262

 (17)
 Make sure the PDU 24 moves clockwise from the 16-degree CW position to the 22-degree CW position then turns in the forward direction.

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747-400 MAINTENANCE MANUAL
 S 715-263
 (18)
 Release the LOCAL DRIVE switch to the OFF position and make sure the PDU 24 does not continue to turn.

 S 715-117

 (19)
 At the local cargo control panel 22R, put the P29 ARMING OFF/ARM switch to the OFF position.

 S 715-264

 (20)
 At the local cargo control panel 24L, hold the LOCAL DRIVE switch to the FWD and AFT positions.

 S 215-265

 (21)
 Make sure no PDUs turn in the forward or aft direction.

 J. Side Door Area Lateral Drive System Test
 S 715-029
 (1)  At the master cargo control panel, M1, make sure the light for the switches that follow are on:
 (a)  
LEFT SIDE ENTRY DRIVE UNITS ON

 (b)  
RIGHT SIDE ENTRY DRIVE UNITS ON

 (c)  
LEFT SIDE ENTRY DRIVE UNITS NORMAL

 (d)  
RIGHT SIDE ENTRY DRIVE UNITS NORMAL

 (e)  
LEFT SIDE MAIN DRIVE SELECT OFF

 (f)  
RIGHT SIDE MAIN DRIVE SELECT OFF

 (g)  
REMOTE CONTROL OFF

 (h)  
20 FT CONTROL OFF.

 S 715-030
 (2)  
At the master cargo control panel, M1, push and hold the LAMP TEST switch and make sure all of the lights for the switches on the panel come on.

 S 715-273

 (3)  
Release the LAMP TEST switch and make sure the lights for the switches that follow remain on:

 (a)  LEFT SIDE ENTRY DRIVE UNITS ON
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MAINTENANCE MANUAL

Operational Test - PDU Response to Local Drive Switches
Figure 501 (Sheet 1)

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747-400
MAINTENANCE MANUAL

Operational Test - PDU Response to Local Drive Switches
Figure 501 (Sheet 2)

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 (b) (c) (d) (e) (f) (g) (h)  RIGHT SIDE ENTRY DRIVE UNITS ONLEFT SIDE ENTRY DRIVE UNITS NORMALRIGHT SIDE ENTRY DRIVE UNITS NORMALLEFT SIDE MAIN DRIVE SELECT OFFRIGHT SIDE MAIN DRIVE SELECT OFFREMOTE CONTROL OFF20 FT CONTROL OFF.
 (4)  S 715-031At the master cargo control panel, M1, hold the DRIVE CONTROL switch to the IN position.
 (5)  S 215-274Make sure the PDUs 19L1, 19L2, 19R1 and 19R2 move counterclockwise from the 0-degree fore-aft position to the 90-degree lateral position.
 (6)  S 215-275Make sure all four PDUs start to turn inboard after all four PDUs reach the 90-degree lateral position.
 (7)  S 715-276Release the DRIVE CONTROL switch to the OFF position and make sure the PDUs do not continue to turn.
 NOTE:____ PDUs 19L2, 19R1 and 19R2 completes their turn cycle before PDU 19L1 starts its cycle.
 (8)  S 715-032At the master cargo control panel, M1, hold the DRIVE CONTROL switch to the OUT position and make sure PDUs 19L1, 19L2, 19R1, and 19R2 start to turn in the outboard direction.
　
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