(b)  
Put the clamp around the switch.

 (c)  
Connect the D2558 electrical connector to the switch.

 (d)  
Remove the temporary cap from the fitting.

 (e)  
Put a layer of antisieze compound on the fitting.

 (f)  
Attach the fitting to the switch.

 S 864-014
 (2)  Close the applicable circuit breakers and remove the 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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737-300/400/500MAINTENANCE MANUAL
 2)  For the right engine:
 a) ENG 2 AND WING A/I CONTROL
 b) ENG 2 COWL ANTI-ICE

 S 864-015
 (3)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  On the P6 panel
 1) PITOT STATIC INDICATION - CAPTAIN
 2) PITOT STATIC INDICATION - F/O

 S 724-016
 (4)  Do a test of the pressure switch circuit.
 (a)  
Make sure the applicable left or right (engine 1 or engine 2) COWL ANTI-ICE light on the P5-11 module is off.

 (b)  
Open the applicable circuit breaker on the P6 panel and attach a DO-NOT-CLOSE tag: 1) For the left engine:

 a) MASTER DIM SEC 1
 2) For the right engine:
 a) MASTER DIM SEC 4

 (c)  
Disconnect the pressure switch connector D2558.

 (d)  
Temporarily connect a wire between pins 1 and 2 of electrical connector D2558.

 (e)  
Remove the DO-NOT-CLOSE tag and close the applicable circuit breaker on the P6 panel: 1) For the left engine:

 a) MASTER DIM SEC 1
 2) For the right engine:
 a) MASTER DIM SEC 4

 (f)  
Make sure the applicable left or right COWL ANTI-ICE light on the P5-11 module comes on.

 (g)  
Open the applicable circuit breaker on the P6 panel and attach a DO-NOT-CLOSE tag: 1) For the left engine:

 a) MASTER DIM SEC 1
 2) For the right engine:
 3) MASTER DIM SEC 4

 (h)  
Remove the wire between pins 1 and 2 of electrical connector D2558.

 (i)  
Connect electrical connector D2558 to the pressure switch.

 (j)  
Remove the DO-NOT-CLOSE tag and close the applicable circuit breaker on the P6 panel: 1) For the left engine:

 a) MASTER DIM SEC 1
 2) For the right engine:
 a) MASTER DIM SEC 4

 (k)  
Make sure the applicable left or right COWL ANTI-ICE light on the P5-11 panel is off.

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 (5)  S 864-017Remove the DO-NOT-CLOSE tags and close these circuit breakers: (a) On the P6 panel 1) PITOT STATIC INDICATION - CAPTAIN 2) PITOT STATIC INDICATION - F/O
 (6)  S 844-018Remove electrical power if it is not necessary (AMM 24-22-00/201).
 (7)  S 414-019Close the fan cowl on the applicable engine (AMM 71-11-02/201).

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737-300/400/500MAINTENANCE MANUAL
 INLET COWL TAI OVERHEAT SWITCH - REMOVAL/INSTALLATION
_____________________________________________________
 1.  General_______
 A.  This procedure contains three tasks:
 (1)
The removal of the overheat switch from the inlet cowl
　
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