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 (a)  6F30, MASTER TRIM AIR CONT
 S 862-037
 (2)  For the lower forward cargo switch, remove the DO-NOT-CLOSE tag and close this circuit breaker:
 (a)  6F36, A/C CONT CARGO - FWD LWR
 S 862-038
 (3)  For the lower aft cargo switch, remove the DO-NOT-CLOSE tag and close this circuit breaker:
 (a)  6F35, A/C CONT CARGO - AFT LWR
 S 862-035
 (4)  Supply electrical power (AMM 24-22-00/201).
 E. Do the Test
 S 862-027
 (1) Do these steps for the Flight Deck Duct Overtemperature Switch:
 (a)  
Disconnect the electrical connector DS1894 from the Flight Deck Duct Overtemperature Switch.

 (b)  
Install a jumper wire between pin 1 and pin 2 of the electrical connector.

 (c)  
Make sure that the "ZONE RST SYS FAULT" switch-light comes on.

 (d)  
Remove the jumper wire from the electrical connector.

 (e)  
Reconnect the electrical connector to the Flight Deck Duct Overtemperature Switch.

 (f)  
Push the "ZONE RST" switch-light on the cabin temperature control module.

 (g)  
Make sure that the "ZONE RST SYS FAULT" switch-light goes off.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-61-07
 ALL  ú ú 01F Page 208 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 862-028
 (2)  Do these steps for the Upper Deck Duct Overtemperature Switch:
 (a)  
Disconnect the electrical connector DS1895 from the Upper Deck Duct Overtemperature Switch.

 (b)  
Install a jumper wire between pin 1 and pin 2 of the electrical connector.

 (c)  
Make sure that the "ZONE RST SYS FAULT" system fault light comes on.

 (d)  
Remove the jumper wire from the electrical connector.

 (e)  
Reconnect the electrical connector to the Upper Deck Duct Overtemperature Switch.

 (f)  
Push the "ZONE RST" switch-light on the cabin temperature control module.

 (g)  
Make sure that the "ZONE RST SYS FAULT" switch-light goes off.

 S 862-029
 (3)  Do these steps for the Crew Rest Area Duct Overtemperature Switch:
 (a)  
Disconnect the electrical connector DS2282 from the Crew Rest Area Duct Overtemperature Switch.

 (b)  
Install a jumper wire between pin 1 and 2 of the electrical connector.

 (c)  
Make sure that the "ZONE RST SYS FAULT" switch-light comes on.

 (d)  
Remove the jumper wire from the electrical connector.

 (e)  
Reconnect the electrical connector to the Crew Rest Area Duct Overtemperature Switch.

 (f)  
Push the "ZONE RST" switch-light on the cabin temperature control module.

 (g)  
Make sure that the "ZONE RST SYS FAULT" switch-light goes off.

 S 862-030
 (4)  Do these steps for the Forward Main Deck Duct Overtemperature Switch:
 (a)  
Disconnect the electrical connector DS2279 from the Forward Main Deck Duct Overtemperature Switch.

 (b)  
Install a jumper wire between pin 1 and 2 of the electrical connector.

 (c)  
Make sure that the "ZONE RST SYS FAULT" switch-light comes on.

 (d)  
Remove the jumper wire from the electrical connector.

 (e)  
Reconnect the electrical connector to the Forward Main Deck Duct Overtemperature Switch.

 (f)  
Push the "ZONE RST" switch-light on the cabin temperature control module.

 (g)  
Make sure that the "ZONE RST SYS FAULT" switch-light goes off.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-61-07
 ALL  ú ú 01F Page 209 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 862-033
 (5)  Do these steps for the Aft Main Deck Duct Overtemperature Switch:
　
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本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊 空調(diào) AIR CONDITIONING 2(139)