21-51-08
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
D. Remove the Overheat Switch
S 022-031
(1) Disconnect the applicable electrical connector (3) from the overheat switch (1):
-DS519 for pack 1
-DS518 for pack 2
-DS521 for pack 3
S 022-032
(2)
Cut and remove the lockwire from the overheat switch (1).
S 022-007
(3)
Use two wrenches to remove the overheat switch (1) from the duct.
NOTE: Use one wrench to hold the boss and the other wrench to
____
turn the overheat switch.
TASK 21-51-08-402-008
3. Install the Pack Discharge Overheat Switch (Fig. 201)
__________________________________________
A. Parts
~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ |201 | 1 | Overheat Switch - Pack 1 | 21-51-08 | 01 | 40 | | | 1 | Overheat Switch - Pack 2 | | 02 | 25 | | | 1 | Overheat Switch - Pack 3 | | 03 | 325 | | | 2 | Packing (O-ring) - Pack 1 | | 01 | 45 | | | 2 | Packing (O-ring) - Pack 2 | | 02 | 30 | | | 2 | Packing (O-ring) - Pack 3 | | 03 | 330 | 2......…........…...................................…..........….....….........1
B. References
(1)
AMM 06-09-03/201, Body Section 44 Access Doors and Panels
(2)
AMM 20-11-28/401, Lockwire
(3)
AIPC 21-51-08-01
(4)
AIPC 21-51-08-02
(5)
AIPC 21-51-08-03
(6)
WDM 21-51-21, WDM 21-51-22, WDM 21-51-23
(7)
SSM 21-51-02
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
C. Access
(1)
Location Zone
133 Air Conditioning Bay, Equipment, LH
134 Air Conditioning Bay, Equipment, RH
(2)
Access Panel
192H-R Air Conditioning Access Door
191N-L Air Conditioning Access Door
D. Install the Overheat Switch
S 422-033
(1)
Put a new O-ring (2) on the overheat switch.
S 422-010
(2)
Use two wrenches to install the overheat switch (1) in the duct.
NOTE: Use one wrench to hold the boss and the other wrench to
____
turn the overheat switch.
S 422-034
(3)
Install a lockwire on the overheat switch (AMM 20-11-28/401).
S 422-035
(4)
Connect the applicable electrical connector (3) to the overheat switch (1):
-DS519 for pack 1
-DS518 for pack 2
-DS521 for pack 3
E. Put the airplane to its usual condition
S 412-013
(1)
Close the applicable access door, 191N-L or 192H-R
(AMM 06-09-03/201).
S 862-014
(2)
Remove the DO-NOT-CLOSE tag and close the applicable circuit breaker, on the P180 DC Power Distribution Panel:
(a)
180J2, PACK 1 PROT
(b)
180F2, PACK 2 PROT
(c)
180J17, PACK 3 PROT
S 862-015
(3) Remove the DO-NOT-OPERATE tag from the applicable PACKS selector, on the P5 panel.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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本文链接地址：747-400 AMM 飞机维护手册 空调 AIR CONDITIONING 2(33)
