S 864-039

 (2)
Energize the circuit breaker panel for the load control, P6-4.

 S 864-027

 (3)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker:

 (a)  P6-4, circuit breaker panel for the load control 1) TEMP IND
 S 714-028
 (4)  
Put the AIR TEMP switch to the PASS CABIN position.

 S 714-041

 (5)  
Make sure the temperature indicator shows approximately the same temperature as the temperature in the cabin.

 S 984-034

 (6)  
Align the slot of the outboard edge of the bullnose with the support beam flange.

 (7)  
Lift the bullnose and install the screws.

 (8)  
Install the PSU assembly (Ref 25-23-61/201).

 S 984-035
 S 434-036
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A
737-300/400/500MAINTENANCE MANUAL
 S 864-037
 (9)  Remove the electrical power if it is not necessary (Ref 24-22-00/201).
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