(2)
The installation of the overheat switch on the inlet cowl

 (3)
The test of the overheat switch.

 B.  Each task contains steps for both the left and right engines. Use only the steps that are applicable to the engine in work.
 TASK 30-21-31-004-001
 2.  Overheat Switch Removal (Fig. 401)_______________________
 A.  References
 (1)
AMM 71-11-02/201, Fan Cowl Panels

 (2)
IPC 71-11-01 Fig. 1

 (3)
SSM 75-11-00

 (4)
WDM 75-11-11, 75-11-21

 B.  Access
 (1)  
Location Zone
 101 Control Cabin - Left
 102 Control Cabin - Right
 502 Fan Cowl, Left Engine
 603 Fan Cowl, Right Engine

 (2)  
Access Panels
 5737 Fan Cowl Panel (RH) - Left Engine
 5837 Fan Cowl Panel (RH) - Right Engine

 C.  Procedure
 S 864-002
 (1) Open the applicable circuit breakers and attach DO-NOT-CLOSE tags:
 (a) On the P18 panel
 1)  For the left engine: a) ENG 1 AND WING A/I CONTROL b) ENG 1 COWL ANTI-ICE
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

SEE A
TAI PRESSURE 
SWITCH 
TAI 
VALVE 

FWD
TAI OVERHEAT
A  SWITCH
Inlet Cowl TAI Overheat Switch Installation
Figure 401

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 2)  For the right engine: a) ENG 2 WING AND A/I CONTROL b) ENG 2 COWL ANTI-ICE
 S 014-003
 (2)  
Open the right hand, fan cowl on the applicable engine (AMM 71-11-02/201).

 S 034-004

 (3)
Disconnect electrical connector D3360 from the switch.

 S 024-005

 (4)  
Remove the switch from the duct.

 S 434-021

 (5)  
Put a cover on the hole in the duct.

 TASK 30-21-31-404-006
 3.  Overheat Switch Installation (Fig. 401)
____________________________
 A.  References
 (1)  
IPC 71-11-01 Fig. 1

 (2)  
SSM 75-11-00

 (3)  
WDM 75-11-11, 75-11-21

 B.  Access
 (1)  
Location Zone
 101 Control Cabin - Left
 102 Control Cabin - Right
 502 Fan Cowl, Left Engine
 603 Fan Cowl, Right Engine

 (2)  
Access Panel
 5737 Fan Cowl Panel (LH), Left Engine
 5837 Fan Cowl Panel (LH), Right Engine

 C.  Procedure
 S 424-020
 (1)  
Remove the cover from the hole in the duct.

 (2)  
Install the switch on the duct.

 (3)  
Tighten the switch from 400 to 440 pound-inches.

 S 864-012

 (4)  
Remove the DO-NOT-CLOSE tags and close the applicable circuit breakers:

 S 424-007
 S 424-019
 (a)  On the P18 panel
 1)  For the left engine: a) ENG 1 AND WING A/I CONTROL
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 b)  ENG 1 COWL ANTI-ICE
 2)  For the right engine: a) ENG 2 AND WING A/I CONTROL b) ENG 2 COWL ANTI-ICE
 S 714-025
 (5)  Do the test of the overheat switch circuit in the paragraph that follows.
　
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