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 
Aviation Partners Boeing 757-200 MAINTENANCE MANUAL SUPPLEMENT  Part II 
3)  Verify the SPEEDBRAKE handle is in the down and locked position  
4)  OPEN the following circuit breakers: 
Circuit breaker panel  Circuit Name  C/B No.  
P6  SPDBRK AUTOSTOW  K22  
P11  AUTO SPEEDBRAKE SYSTEM  G11 
5) Verify the following occurs: 
. amber AUTO SPEEDBRAKE EICAS message is illuminated 
. amber AUTO SPDBRK message on overhead panel is illuminated 6) Locate the SAC module on the E2 rack in the electronic bay. 7) Disconnect the harness connector from SAC module and connect it to the TEST connector 
located on structure adjacent to the module. 8) CLOSE the following circuit breakers: 
Circuit breaker panel  Circuit Name  C/B No.  
P11  AUTO SPEEDBRAKE SYSTEM  G11 
9) Verify the following occurs: 
. 
amber AUTO SPEED BRAKE EICAS message is extinguished
. 
amber AUTO SPDBRK message on overhead panel is extinguished
10) OPEN the following circuit breakers: 
Circuit breaker panel  Circuit Name  C/B No.  
P11  AUTO SPEEDBRAKE SYSTEM  G11 
11) Locate the SAC module on the E2 rack in the electronic bay. 
12) Disconnect the harness from the TEST connector and connect it to the SAC module. 
13) CLOSE the following circuit breakers:
Circuit breaker panel  Circuit Name  C/B No.  
P11  AUTO SPEEDBRAKE SYSTEM  G11 
Aviation Partners Boeing 
757-200 MAINTENANCE MANUAL SUPPLEMENT  Part II
 
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