(2)
Install the Compressor Discharge Overheat Switch
(3)
Do the Compressor Discharge Overheat Switch Test.
TASK 21-51-09-002-001
2. Remove the Compressor Discharge Overheat Switch (Fig. 201)_______________________________________________
A. References
(1)
AMM 06-09-03/201, Body Section 44 Access Doors and Panels
(2)
AIPC 21-51-09 Fig. 1
(3)
WDM 21-51-21, WDM 21-51-22, WDM 21-51-23
(4)
SSM 21-51-02
B. Access
(1)
Location Zone
133 Air Conditioning Equipment Bay, LH
134 Air Conditioning Equipment Bay, RH
(2)
Access Panel
191A-L Air Conditioning Access Door
192A-R Air Conditioning Access Door
191H-L Air Conditioning Access Door
C. Prepare for the Removal
S 862-002
(1) Make sure the applicable (1, 2, or 3) PACKS selector, on the overhead panel, P5, is in the OFF position.
(a) Put a DO-NOT-OPERATE tag on the selector.
S 862-003
(2) Open the applicable circuit breaker, on the P180 DC Power Distribution Panel, and attach a DO-NOT-CLOSE tag:
(a)
180J2, PACK 1 PROT
(b)
180F2, PACK 2 PROT
(c)
180J17, PACK 3 PROT
S 012-004
(3) Open the applicable access door (AMM 06-09-03/201):
-191A-L for pack 1
-191H-L for pack 2
-192A-R for pack 3
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-51-09
ALL ú ú 01 Page 201 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
SEE A
SEE A
FWD
COMPRESSOR DISCHARGE DUCT
COMPRESSOR DISCHARGE TEMPERATURE BULB OVERHEAT SWITCH
ELECTRICAL CONNECTOR
A
Compressor Discharge Overheat Switch Installation
Figure 201
L56068
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-51-09
ALL ú ú 01 Page 202 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
D. Remove the Overheat Switch
S 022-033
(1) Disconnect the electrical connector from the overheat switch.
-DS520 for pack 1
-DS517 for pack 2
-DS522 for pack 3
S 022-034
(2)
Cut and remove the lockwire from the overheat switch.
S 022-007
(3)
Use two wrenches to remove the overheat switch from the duct.
NOTE: Use one wrench to hold the boss and the other wrench to
____
turn the overheat switch.
TASK 21-51-09-402-008
3. Install the Compressor Discharge Overheat Switch (Fig. 201)
________________________________________________
A. References
(1)
AMM 06-09-03/201, Body Section 44 Access Doors and Panels
(2)
AMM 20-11-28/401, Lockwire
(3)
AIPC 21-51-09 Fig. 1
(4)
WDM 21-51-21, WDM 21-51-22, WDM 21-51-23
(5)
SSM 21-51-02
B. Access
(1)
Location Zone
133 Air Conditioning Equipment Bay, LH
134 Air Conditioning Equipment Bay, RH
(2)
Access Panel
191A-L Air Conditioning Access Door
192A-R Air Conditioning Access Door
191H-L Air Conditioning Access Door
中國航空網 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 AIR CONDITIONING 2(35)
