21-51-00
ALL ú ú 04 Page 505 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 865-027
(19)
Put the wing flaps to the FLAPS UP position (Ref 27-51-00/001).
S 765-028
(20)
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 035-029
(21)
Disconnect the electrical connectors, D486 and D490, from the left and right pack valves, respectively.
S 765-030
(22)
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 035-031
(23)
Disconnect the electrical connector, D494, from the left turbofan valve.
S 765-032
(24)
Make sure there is 28v dc between pins 1 and 3 at the electrical connector, D494.
(25)
Connect the electrical connector, D486, to the left pack valve.
S 765-034
(26)
Make sure there is 28v dc between pins 3 and 5 at the electrical connector, D494.
(27)
Connect the electrical connector, D494, to the left turbofan valve.
S 035-036
(28)
Disconnect the electrical connector, D500, from the right turbofan valve.
S 435-033
S 435-035
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-51-00
ALL ú ú 04 Page 506 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 765-037
(29)
Make sure there is 28v dc between pins 1 and 3 at the electrical connector, D500.
S 435-038
(30)
Connect the electrical connector, D490, to the right pack valve.
S 765-039
(31)
Make sure there is 28v dc between pins 3 and 5 at the electrical connector, D500.
S 865-040
(32)
Move the L PACK and R PACK switches to OFF.
S 435-041
(33)
Connect the remaining electrical connectors which you removed from the left and right pack valves.
G. Put the Airplane Back to Its Usual Condition
S 415-253
(1)
Close the bay doors for the air conditioning equipment.
S 865-254
(2)
Remove the electrical power if it is not necessary (AMM 24-22-00/201).
TASK 21-51-00-705-255
3. System Test - Air Cycle System - Pack Thermal Switch & Protective Circuit_________________________________________________________________________
A. General
(1) This task has the steps to do a test of the thermal switch and the protective circuit.
B. Special Tools and Equipment
(1)
Jumper wire
(2)
Voltmeter
C. References
(1)
AMM 24-22-00/201, Electrical Power
(2)
AMM 27-51-00/001, Trailing Edge Flap System
D. Access
(1)
Location Zones
101 Control Cabin - Left
102 Control Cabin - Right
212 Left Air Conditioning Equipment Bay
214 Right Air Conditioning Equipment Bay
(2)
Access Panels
3303L A/C Access Panel
3403R A/C Access Panel
中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 空调 AIR CONDITIONING 1(135)
