B.  Access
 (1)  
Location Zone
 133 Air Conditioning Equipment Bay, LH
 134 Air Conditioning Equipment Bay, RH

 (2)  
Access Panel
 191EL Air Conditioning (Pack 1)
 191ML Air Conditioning (Pack 2)
 192ER Air Conditioning (Pack 3)

 C.  Prepare to Remove the Limit Switch
 S 014-002
 (1) Open the access panel for the applicable pack (Ref 06-09-03/201):
 (a) 191EL for pack 1
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-62-12
 ALL  ú ú 01 Page 401 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

SEE A
RAM AIR EXIT DOOR ACTUATOR
SEE C
RAM AIR EXIT DOOR
RAM AIR EXIT DOOR LIMIT SWITCH SEE B
A
Ram Air Exit Door Limit Switch Installation
Figure 401 (Sheet 1)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-62-12
 ALL  ú ú 01 Page 402 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

RAM AIR EXIT DOOR LIMIT SWITCH

RAM AIR EXIT DOOR ACTUATOR

Ram Air Exit Door Limit Switch Installation
Figure 401 (Sheet 2)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-62-12
 ALL  ú ú 01 Page 403 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (b)  
191ML for pack 2

 (c)  
192ER for pack 3

 S 864-007
 (2)  
Put the PACKS (1,2 or 3) switch to OFF, on the P5 overhead panel, for the applicable pack (1,2 or 3).

 S 864-008

 (3)  
Put a DO-NOT-OPERATE tag on the PACKS switch.

 S 864-009

 (4)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6 Main Power Distribution Panel
 1) 6F35, PACK TEMP CONT A
 2) 6F36, PACK TEMP CONT B

 (b)  
P180 DC Power Distribution Panel
 1) 180J2 PACK 1 PROT
 2) 180F2 PACK 2 PROT
 3) 180J17 PACK 3 PROT

 (c)  
P415 Power Distribution Center - Right 1) 415C38 PACK TEMP CONT B 2) 415K27 PACK TEMP CONT A

 D. Remove the Limit Switch
 S 034-010
 (1)  
Disconnect the wires from the terminals 1 and 3 on the limit switch.

 S 034-047

 (2)
Remove the remaining sealant from the wires and the limit switch.

 S 034-013

 (3)  
Remove the lockwire from the jamnuts on the limit switch.

 (4)
Remove the jamnuts and the lockwasher on the limit switch.

 (5)  
Remove the limit switch from the support bracket.

 S 034-011
 S 024-012
 TASK 21-62-12-404-003
 3.  Ram Air Exit Door Limit Switch Installation (Fig. 401)___________________________________________
 A. Standard Tools and Equipment
 (1)  Ohmmeter
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-62-12
 ALL  ú ú 01 Page 404 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 B. Consumable Materials
 (1) A00247 Sealant, Pressure and Enviromental - Chromate Type - BMS5-95
 C. References
 (1)  
06-09-03/201, Body Section 44 Access Doors and Panels

 (2)  
20-11-28/401, Lockwire
　
中國航空網 m.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 AIR CONDITIONING 2(185)