.
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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