(b)  
11S23, LANDING GEAR POS SYS 2

 S 215-024
 (19)
 Make sure the R AOA annunciator is off.

 S 865-045

 (20)
 Remove the DO-NOT-CLOSE tag and close these circuit breakers on the P11 panel:

 (a)  
11C19, LANDING GEAR POS SYS 2 ALTN

 (b)  
11S23, LANDING GEAR POS SYS 2

 S 865-026
 (21)
 Connect a jumper between the test receptacle J1 on the Left Engine Speed Card M10298 (P50 card file) and the airplane ground.

 S 215-027

 (22)
 Make sure the L AOA and R AOA annunciators are off.

 S 865-028

 (23)
 Remove the jumper lead.

 S 215-029

 (24)
 Do the above three steps again for the Right Engine Speed Card M10311 (P50 card file).

 E. Put the Airplane Back to Its Usual Condition
 S 445-041
 (1)  
Put the safety-sensitive systems back to their initial conditions (Ref 32-09-02/201).

 S 445-042

 (2)  
Do the activation procedure for the spoilers if you did the
 deactivation procedure (Ref 27-61-00/201).

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757
MAINTENANCE MANUAL

 S 865-030
 (3) Remove electrical power if it is not necessary (Ref 24-22-00/201).
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1.

2.

3.

757 MAINTENANCE MANUAL
 TOTAL AIR TEMPERATURE PROBE HEAT - DESCRIPTION AND OPERATION
____________________________________________________________
General
_______
 A.  The total air temperature (TAT) probe is electrically heated to prevent erroneous readings due to ice conditions. TAT system components include: the TAT probe, the auxiliary annunciator panel, and the miscellaneous test panel.
 B.  System electrical power comes from the right main 28-volt dc bus and the right main 115-volt ac bus. Circuit breakers are on overhead circuit breaker panel P11, and main power distribution panel P6.
　
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