.
amber AUTO SPDBRK message on overhead panel is illuminated

15) CLOSE the following circuit breakers:
Circuit breaker panel  Circuit Name  C/B No. 
P6  SPDBRK AUTOSTOW  K22 

16) Verify the following occurs:
.
amber AUTO SPEED BRAKE EICAS message is extinguished

.
amber AUTO SPDBRK message on overhead panel is extinguished

17) Simultaneously press and hold the AUTO TEST and RIG TEST buttons for one second on the front of the SAC module.  Verify the following:
.
all three lights on the SAC module illuminate for 2 seconds

.
amber AUTO SPEED BRAKE EICAS message is illuminated for 2 seconds

.
amber AUTO SPDBRK message on overhead panel is illuminated for 2 seconds

. all lights shall extinguish after 4 seconds 18) Return the airplane to normal configuration.
Aviation Partners Boeing
757-200 MAINTENANCE MANUAL SUPPLEMENT  Part II
TASK 27-62-00-000-503
3.  Autostow System Ground Test
A. General
1)  This test is to ensure that the Speedbrake Autostow Controller (SAC), the actuator and autostow mechanism are operating satisfactory. NOTE: Airplane system hydraulics are not required for this test
B.  Tool and Equipment Requirements
1) No special tools or equipment required

C. Procedure
1) Make sure the airplane is in this configuration:

a)  Electrical power is on (AMM 24-22-00/201). Note: If external power is used, supply external power per AMM 24-22-00/201, S862-
036. Failure to supply power per this procedure will cause the “Autostow Fault” light to illuminate on the SAC module.
b)  Verify airplane is in GROUND mode.  Landing gear not tilted, air/ground switches not slugged.
2)  Verify the following circuit breakers on the P11circuit 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 
 AP57.2-0600-2 27-62-00 Page 507 Mar 05

Circuit:  C/B No. 
FSEU3 SENSOR  G23 
RADIO ALT, LEFT  F5 
RADIO ALT, RIGHT  F26 
RADIO ALT, CENTER  F20 
L FMCS CMPTR  E9 
　
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