WARNING:_______DO NOT TOUCH THE HEATERS TO KNOW THEY ARE ON. FEEL THE AIR CLOSE TO THE HEATERS TO KNOW THEIR TEMPERATURE. THE HEATERS CAN GET VERY HOT AND CAUSE INJURY IF YOU TOUCH THEM.

 (g)  
Make sure that only the top right pitot tube gets hot.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (h)  
Open the F/O - UPPER R circuit breaker on the P18 panel.

 (i)  
Make sure that the F/O P/S 2 AUX STATIC light comes on.

 (j)  
Put the PITOT-STATIC B switch in the off position.

 S 865-039
 (3)  
Close the CAPT-LWR R circuit breaker on the P18 panel.

 S 715-010

 (4)  
Do a test of the heater in the lower right pitot tube.

 (a)  
Put the PITOT-STATIC A switch in the on position.

 (b)  
Make sure all the lights on the window and pitot heat module stay on.

 (c)  
Make sure all the pitot tube heaters are off.

 (d)  
Put the PITOT-STATIC A switch in the off position.

 CAUTION: DO NOT OPERATE ANY HEATER FOR MORE THAN 5 MINUTES.
_______ YOU CAN DECREASE THE LIFE OF THE HEATER IF YOU LET IT STAY ON.
 (e)  
Put the PITOT-STATIC B switch in the on position.

 (f)  
Make sure that only the CAPT STATIC 1 AUX P/S light goes off.

 WARNING:_______DO NOT TOUCH THE HEATERS TO KNOW THEY ARE ON. FEEL THE AIR CLOSE TO THE HEATERS TO KNOW THEIR TEMPERATURE. THE HEATERS CAN GET VERY HOT AND CAUSE INJURY IF YOU TOUCH THEM.

 (g)  
Make sure only the lower right pitot tube gets hot.

 (h)  
Open the CAPT-LWR R circuit breaker on the P18 panel.

 (i)  
Make sure that the CAPT STATIC 1 AUX P/S indicator light comes on.

 (j)  
Put the PITOT STATIC B switch in the off position.

 S 865-035
 (5)  
Close the ELEVATOR PITOT-R circuit breaker on the P18 panel.

 S 715-028

 (6)  
Do a test of the heater that is on the pitot tube for the right elevator.

 (a)  Put the PITOT-STATIC A switch in the on position.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (b)  
Make sure all the lights on the window and pitot heat module stay on.

 (c)  
Make sure all the pitot tube heaters are off.

 (d)  
Put the PITOT-STATIC A switch in the off position.

 CAUTION: DO NOT OPERATE ANY HEATER FOR MORE THAN 5 MINUTES.
_______ YOU CAN DECREASE THE LIFE OF THE HEATER IF YOU LET IT STAY ON.
 (e)  
Put the PITOT-STATIC B switch in the on position.

 (f)  
Make sure that only the R ELEV PITOT indicator light goes off.

 WARNING:_______DO NOT TOUCH THE HEATERS TO KNOW THEY ARE ON. FEEL THE AIR CLOSE TO THE HEATERS TO KNOW THEIR TEMPERATURE. THE HEATERS CAN GET VERY HOT AND CAUSE INJURY IF YOU TOUCH THEM.

 (g)  
Make sure only the pitot tube for the right elevator gets hot.

 (h)  
Open the ELEVATOR PITOT-R circuit breaker on the P18 panel.

 (i)  
Make sure that the R ELEV PITOT indicator light comes on.

 (j)  
Put the PITOT STATIC B switch in the off position.

 G. Do a test of the Alpha Vane Heaters.
 S 865-029
 (1)
Close the ALPHA VANE HTR - L circuit breaker on the P18 panel.

 S 715-036

 (2)  
Do a test of the heater in the left alpha vane.

 (a)  
Put the PITOT-STATIC B switch in the on position.

 (b)  
Make sure that all the lights on the window and pitot heat module stay on.

 (c)  
Make sure all the pitot tube heaters are off.

 (d)  
　
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