(c)  
Air/Ground Relay System is serviceable (AMM 32-09-02/201).

 E. Prepare for Test
 S 865-016
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 015-017

 (2)
Remove any covers from the pitot-static and the temperature probes.

 S 865-062
 WARNING: MAKE SURE TO OPEN ENGINE IGNITION CIRCUIT BREAKERS BEFORE YOU
_______ SET THE FUEL CONTROL SWITCH TO RUN. IF YOU DO NOT OPEN THE CIRCUIT BREAKERS, THE IGNITER PLUGS CAN AUTOMATICALLY FIRE. WITH UNBURNED FUEL IN THE COMBUSTION CHAMBER, THERE MAY BE AN INTERNAL ENGINE FIRE OR A TAILPIPE FIRE. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO THE ENGINE.
 (3)  
Open the following circuit breakers on the P6, Main Power
 Distribution Panel:

 (a)  
6F1, IGN 1 ENG 1

 (b)  
6K19, IGN 2 ENG 1

 (c)  
6G19, STBY IGN ENG 1

 (4)  
Set the FUEL CONTROL 1 switch on the P8 control stand to RUN.

 S 865-101
 NOTE: No probe heat EICAS messages will show until approximately
____ five minutes after the FUEL CONTROL 1 switch is set to RUN.
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 S 045-058
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO PREPARE
_______ THE SAFETY-SENSITIVE SYSTEMS FOR THE AIR MODE. FAILURE TO DO THE STEPS CORRECTLY CAN CAUSE THE AUTOMATIC OPERATION OF AIRPLANE SYSTEMS. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (5)  
Do this task: "Prepare Safety-Sensitive Systems for Air Mode Simulation" (AMM 32-09-02/201).

 S 865-019

 (6)  
Make sure that these circuit breakers are open:

 (a)  P6, Main Power Distribution Panel
 1) 6D35, PROBE HEAT IND R
 2) 6D31, PROBE HEAT PITOT R
 3) 6D32, PROBE HEAT AUX PITOT L
 4) 6D33, PROBE HEAT AUX PITOT R
 5) 6D28, PROBE HEAT TAT L
 6) 6D29, PROBE HEAT TAT R
 7) 6C33, AOA HEAT L
 8) 6C34, AOA HEAT R
 9) 6H19, PROBE HEAT ENG 1
 10) 6H21, PROBE HEAT ENG 2
 11) 6H23, PROBE HEAT ENG 3
 12) 6H25, PROBE HEAT ENG 4

 F. Upper Left Pitot Probe Heat System Test
 S 715-021
 (1)  Make sure that the upper left pitot probe heaters operate:
 (a)  
Close 6D34, PROBE HEAT IND L and 6D30, PROBE HEAT PITOT L circuit breakers on the P6, Main Power Distribution Panel.

 (b)  
Make sure that the EICAS advisory message HEAT P/S CAPT shows.

 (c)  
Make sure that the upper left pitot probe temperature does not increase.

 (d)  
Open 7F23, LANDING GEAR DSP & CONT ALTN circuit breaker on the P7, Overhead Circuit Breaker Panel.

 (e)  
Make sure that the EICAS advisory message HEAT P/S CAPT does not show.

 (f)  
Make sure that the upper left pitot probe temperature increases.

 (g)  
Close 7F23, LANDING GEAR DISP & CONT ALTN circuit breaker on the P7, Overhead Circuit Breaker Panel.

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MAINTENANCE MANUAL

 (h)  Make sure that the EICAS advisory message HEAT P/S CAPT shows.
 S 715-022
 (2)  Make sure that the upper left pitot probe head heater operates:
 (a)  
Open 6D34, PROBE HEAT IND L and 6D30, PROBE HEAT PITOT L circuit breakers on the P6, Main Power Distribution Panel.

 (b)  
Remove relay, R7433, from the P414, Left Power Distribution Center.

 (c)  
Close 6D34, PROBE HEAT IND L and 6D30, PROBE HEAT PITOT L circuit breakers on the P6, Main Power Distribution Panel.

 (d)  
Open 7F23, LANDING GEAR DSP & CONT ALTN circuit breaker on the P7, Overhead Circuit Breaker Panel.
　
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