(2)  24-22-00/201, Manual Control
 B. Access
 (1)  Location Zone
 221 Control Cabin, LH
 222 Control Cabin, RH

 C. Prepare for the Procedure
 S 865-050
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-051

 (2)  
Start the air conditioning packs (AMM 21-00-00/201).

 D. Procedure
 S 865-052
 (1)  
Put the LOWER LOBE CARGO COND AIR FLOW RATE selector on the overhead P461 panel to LOW, BOTH.

 S 865-053

 (2)  
Put the LOWER LOBE TEMP - FWD and LOWER LOBE TEMP - AFT temperature selectors on the overhead P5 panel to AUTO C.

 S 715-054

 (3)  
Make sure on the EICAS ECS maintenance page that the zone LWR FWD, and LWR AFT trim valve positions decrease (move toward closed).

 NOTE: The valves may take several minutes to move.
____
 S 715-055
 (4)  
Make sure that the DUCT TEMP values for the zone LWR FWD and LWR AFT decrease.

 S 715-056

 (5)
Make sure that the Pack Discharge Temp for Packs 2 and 3 decrease.

 NOTE: The pack discharge temperatures may already be at their
____
 minimum, approximately 3 degrees C.

 S 865-057
 (6)  Put the LOWER LOBE TEMP - FWD and LOWER LOBE TEMP - AFT temperature selectors to AUTO W.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-61-00
 ALL  ú ú 01F Page 507 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 715-058
 (7) Make sure on the EICAS ECS maintenance page that the zone LWR FWD and LWR AFT trim valve positions increase (move toward open).
 NOTE: The valves may take several minutes to move.
____
 S 715-059
 (8)  
Make sure that the DUCT TEMP values for the zone LWR FWD and LWR AFT increase.

 S 865-060

 (9)  
Wait 5 minutes.

 S 715-061

 (10)
 Make sure that none of these EICAS advisory messages show on EICAS:

 (a)  
PACK 1

 (b)  
PACK 2

 (c)  
PACK 3

 (d)  
TEMP ZONE

 S 715-062
 (11) Make sure that there are no temperature control system existing faults shown on the CMC.
 E. Put the Airplane Back to its Usual Condition
 S 865-063
 (1)  
Put the LOWER LOBE CARGO COND AIR FLOW RATE switch to OFF.

 (2)  
Stop the air conditioning packs (AMM 21-00-00/201).

 S 865-065

 (3)  
Remove the electrical power if it is not necessary
 (AMM 21-00-00/201).

 S 865-064
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-61-00
 ALL  ú ú 01F Page 508 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 ZONE TEMPERATURE CONTROLLER - REMOVAL/INSTALLATION
__________________________________________________
 1.  General_______
 A.  The zone temperature controller is on the E2-4 electronics shelf in the main equipment center.
 B.  The removal task has an optional check for the stored shop faults.
 TASK 21-61-01-004-001
 2.  Zone Temperature Controller Removal (Fig. 401)___________________________________
 A.  References
 (1)  
20-11-28/401, Rack-Mounted Electrical/Electronic Module

 (2)  
24-22-00/201, Manual Control

 (3)  
AMM 45-10-00/201, Central Maintenance Computer System

 (4)  
IPC 21-61-01

 (5)  
WDM 21-63-31

 (6)  
SSM 21-63-01

 B.  Access
 (1)  Location Zone
 118 Electrical/Electronic Compartment, RH

 C.  Record the Shop Faults (Optional)
 S 864-011
 (1)  
Supply electrical power (Ref 24-22-00/201).
　
中國航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 空調(diào) AIR CONDITIONING 2(126)