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b)  Verify airplane is in GROUND mode.  Landing gear not tilted, air/ground switches not slugged.
Aviation Partners Boeing 757-200 MAINTENANCE MANUAL SUPPLEMENT  Part II
2) Verify the following circuit breakers on the P11 circuit breaker panel are closed:
Circuit:  C/B No. 
Aileron Position Right  J23 
Aileron Position Left  J14 
Aileron Trim  J15 
EICAS Upper Display   J3 
EICAS Lower Display  J30 
L EICAS Computer  J2 
R EICAS Computer  J29 
FSEU1 POWER  G12 
FSEU1 CONT  G13 
FSEU1 SENSOR  G14 
FSEU2 POWER  C14 
FSEU2 CONT  C15 
FSEU2 SENSOR  C16 
FSEU3 POWER  G21 
FSEU3 CONT  G22 

Circuit:  C/B No. 
FSEU3 SENSOR  G23 
RADIO ALT, LEFT  F5 
RADIO ALT, RIGHT  F26 
RADIO ALT, CENTER  F20 
AUTO SPEEDBRAKE  G11 
L FMCS CMPTR  E9 
R FMCS CMPTR  E30 
L FMCS CDU  E8 
R FMCS CDU  E29 
L ADC COMP  A10 
L AIR DATA SENSOR  A11 
L AIR DATA BARO CORRECT  A12 
R ADC COMP  F30 
R AIR DATA SENSOR  F31 
R AIR DATA BARO CORRECT  F32 

3) Open the following circuit breaker:
Circuit breaker panel  Circuit Name  C/B No. 
P11  AUTO SPEEDBRAKE SYSTEM  G11 

4)  Disconnect the SAC airplane harness connector from the test connector and connect it to the 
SAC connector. 
5)  Remove the circuit breaker collar from the following circuit breaker: 

Circuit breaker panel  Circuit Name  C/B No. 
P6  SPDBRK AUTOSTOW  K22 

Aviation Partners Boeing
757-200 MAINTENANCE MANUAL SUPPLEMENT  Part II
6) Close the following circuit breakers:
Circuit breaker panel  Circuit Name  C/B No. 
P6  SPDBRK AUTOSTOW  K22 
P11  AUTO SPEEDBRAKE SYSTEM  G11 

7) Make sure the autostow system is operational. Do this task: Functional Test (Supplemental AMM TASK 27-62-00-000-503). 8) If fault is present, correct the fault a) Check for Lights on the SAC. b) Go to the APB Fault Isolation Manual (FIM) AP57.2-0610 for rectification of the system. c) Repair system and repeat Autostow System Ground Check,  (Supplement TASK 27-62-00-000-503). 9) Remove the autostow inoperative placard. 10) Return the airplane to normal configuration.
Aviation Partners Boeing
757-200 MAINTENANCE MANUAL SUPPLEMENT  Part II
Flight Controls
Speedbrake Autostow System Adjustment/Test

TASK 27-62-00-000-501
　
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