21-51-00
ALL ú ú 03 Page 503 ú Mar 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 765-013
(4) Make sure these voltages occur at these electrical connnectors:
Left Pack Valve_______________ Right Pack Valve
D392 pin 1 to 2 0v dc D394 pin 1 to 2 0v dc
D962 pin 1 to 2 0v dc D964 pin 1 to 2 0v dc
D488 pin 1 to 3 28v dc D492 pin 1 to 3 28v dc
D488 pin 3 to 5 0v dc D492 pin 3 to 5 0v dc
S 865-015
(5)
Move the engine BLEED 1 and engine BLEED 2 switches to OFF.
S 865-366
(6)
Start the APU (AMM 49-11-00/201).
(a) Allow the APU operation to become stable before you supply pneumatic power.
S 865-016
(7)
Move the APU BLEED switch to ON.
S 215-017
(8)
Make sure the APU operation is more than 95% of full speed.
S 765-018
(9)
Make sure these voltages occur at these electrical connectors:
Left Pack Valve_______________ Right Pack Valve
D392 pin 1 to 2 28v dc D394 pin 1 to 2 28v dc
D962 pin 1 to 2 0v dc D964 pin 1 to 2 0v dc
D488 pin 1 to 3 28v dc D492 pin 1 to 3 28v dc
D488 pin 3 to 5 0v dc D492 pin 3 to 5 0v dc
S 865-019
(10)
Push and hold the GND SENSING switch, on the E11 Landing Gear Logic Shelf.
S 765-020
(11)
Make sure these voltages occur at these electrical connnectors:
Left Pack Valve_______________ Right Pack Valve
D392 pin 1 to 2 0v dc D394 pin 1 to 2 0v dc
D962 pin 1 to 2 0v dc D964 pin 1 to 2 0v dc
D488 pin 1 to 3 28v dc D492 pin 1 to 3 28v dc
D488 pin 3 to 5 0v dc D492 pin 3 to 5 0v dc
S 865-021
(12) Release the GND SENSING switch.
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21-51-00
ALL ú ú 03 Page 504 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 765-022
(13) Make sure these voltages occur at these electrical connectors:
Left Pack Valve_______________ Right Pack Valve
D392 pin 1 to 2 28v dc D394 pin 1 to 2 28v dc
D962 pin 1 to 2 0v dc D964 pin 1 to 2 0v dc
D488 pin 1 to 3 28v dc D492 pin 1 to 3 28v dc
D488 pin 3 to 5 0v dc D492 pin 3 to 5 0v dc
S 865-023
(14)
Move the APU BLEED switch to OFF.
S 765-024
(15)
Make sure these voltages occur at these electrical connectors:
Left Pack Valve_______________ Right Pack Valve
D392 pin 1 to 2 0v dc D394 pin 1 to 2 0v dc
D962 pin 1 to 2 0v dc D964 pin 1 to 2 0v dc
D488 pin 1 to 3 28v dc D492 pin 1 to 3 28v dc
D488 pin 3 to 5 0v dc D492 pin 3 to 5 0v dc
S 865-025
(16)
Move the L PACK and R PACK switches to AUTO.
S 765-352
(17)
AIRPLANES WITH LINE NUMBERS LESS THAN 1225 PRE-SB 21-1086; Make sure these voltages occur at these electrical connectors:
Left Pack Valve_______________ Right Pack Valve
D392 pin 1 to 2 0v dc D394 pin 1 to 2 0v dc
D962 pin 1 to 2 28v dc D964 pin 1 to 2 28v dc
D488 pin 1 to 3 28v dc D492 pin 1 to 3 28v dc
D488 pin 3 to 5 0v dc D492 pin 3 to 5 0v dc
S 765-026
(18) AIRPLANES WITH LINE NUMBERS LESS THAN 1225 POST-SB 21-1086; AIRPLANES WITH LINE NUMBERS GREATER THAN 1224; Make sure these voltages occur at these electrical connectors:
Left Pack Valve_______________ Right Pack Valve
D392 pin 1 to 2 0v dc D394 pin 1 to 2 0v dc
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