(a)  
Make sure these circuit breakers on the P11 panel are closed: 1) EICAS (6 locations) 2) 11A10, AIR DATA CMPTR LEFT 3) 11A11, AIR DATA AOA SENSOR LEFT 4) 11A12, AIR DATA BARO CORRECT LEFT 5) 11C6, CSEU 1L AC

 or FLT CONT ELEC 1L AC
 6)  11C7, CSEU 1L DC
 or FLT CONT ELEC 1L DC
 7)  11C8, CSEU 2L AC
 or FLT CONT ELEC 2L AC
 8)  11C9, CSEU 2L DC
 or FLT CONT ELEC 2L DC 9) 11F30, AIR DATA CMPTR RIGHT 10) 11F31, AIR DATA AOA SENSOR RIGHT 11) 11F32, AIR DATA BARO CORRECT RIGHT
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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MAINTENANCE MANUAL

 12) 11G17, CSEU 1R AC
 or FLT CONT ELEC 1R AC
 13) 11G18, CSEU 1R DC
 or FLT CONT ELEC 1R DC
 14) 11G27, CSEU 2R AC
 or FLT CONT ELEC 2R AC
 15) 11G28, CSEU 2R DC
 or FLT CONT ELEC 2R DC
 16) 11J12, ELEVATOR LIMIT
 17) 11S15, AIR/GND SYS 1
 18) 11S19, AIR/GND SYS 2
 (b)  
Push the ECS/MSG select switch on the P61 panel.

 (c)  
Push AUTOREAD, then push ERASE on the P61 panel
 (FIM 31-41-00/101, Fig. 109).

 (d)  
Put the COMPUTER select switch on the captain's display select panel, P9, to L.

 (e)  
Make sure that the ELEV ASYM message is not shown on the EICAS display.

 (f)  
Put the COMPUTER select switch to R.

 (g)  
Make sure that the ELEV ASYM message is not shown on the EICAS display.

 (h)  
Make sure that these faultballs are clear on the left and right SAM's: 1) ADC 2) L AIL/E ASY ACT 3) AIR/GND 4) SAM

 (i)  
Open the access door for the aft stabilizer compartment, 313AL (AMM 06-42-00/201).

 S 725-119
 (2)  
Do the steps that follow for the elevator asymmetry limit crossfeed test:

 (a)  
Open this circuit breaker on the P11 panel:
 1) 11A10, AIR DATA CMPTR LEFT

 (b)  
Stop for 2 seconds, then make sure that the ELEV ASYM message is not shown on the EICAS display.

 (c)  
Open this circuit breaker on the P11 panel:
 1) 11F30, AIR DATA CMPTR RIGHT

 (d)  
Stop for 35 seconds, then make sure that the ELEV ASYM message is shown on the EICAS display.

 (e)  
Put the COMPUTER select switch on the P9 panel to L.

 (f)  
Erase the EICAS maintenance page (FIM 31-41-00/101, Fig. 109).

 (g)  
Make sure that ELEV ASYM is shown on the EICAS display.

 (h)  
Close this circuit breaker on the P11 panel:
 1) 11A10, AIR DATA CMPTR LEFT

 (i)  
Stop for 5 seconds, then erase the EICAS maintenance page (FIM 31-41-00/101, Fig. 109).

 (j)  
Make sure that the ELEV ASYM message is not shown on the EICAS display.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 11 Page 580F ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (k)  Close this circuit breaker on the P11 panel:
 1) 11F30, AIR DATA CMPTR RIGHT

 S 725-120
 (3)  
Do the steps that follow for the left SAM elevator asymmetry limit interface test:

 (a)  
Open these circuit breakers on the P11 panel:
 1) 11G17, CSEU 1R AC
 or FLT CONT ELEC 1R AC

 2)  11G27, CSEU 2R AC
 or FLT CONT ELEC 2R AC

 (b)  
Stop for 2 seconds, then make sure that the ELEV ASYM message is not shown on the EICAS display.

 (c)  
Put the ADC test switch, on the P61 panel, to the test position for one of the ADCs.

 (d)  
Stop for 2 seconds, then make sure that the asymmetry limit actuator extends and then retracts.

 NOTE: ADC test switch operation extends the elevator asymmetry
　
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