737-700 AVIONCS BITE HANDBOOK 航电自测设备手册 1(24)

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In the example on the graphic, the arrow points to the left to show that FMC 1 is the primary FMC. If the arrow points to the right, this shows that FMC 2 is the primary FMC.
When the FMC select switch on the P5 overhead panel is in the NORMAL or BOTH-ON-LEFT position, FMC 1 is the primary FMC. In the BOTH-ON-RIGHT position, FMC 2 is the primary FMC.
FMCS BITE Page
The FMCS BITE page has these FMC maintenance categories:
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SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL

FMCS BITE PAGES - BITE ENTRY
-INFLT FAULTS
-CDU TEST
-SENSORS
-DISCRETES
-FIXED OUTPUTS
-MODEL/ENG
-SW OPTIONS
-PERF FACTOR
-LCD CDU
-IRS MONITOR.

FMC Download
The FMC DOWNLOAD prompt gives the capability to copy FMC internal diagnostic data to a 3.5 inch diskette without removal of the FMC from the airplane. The data is downloaded to a portable data loader (PDL) from specially formatted diskettes.
The process starts by selection of the FMC DOWNLOAD prompt (LSK 6R). The MCDU shows the FMCS DATA LOADER page which has instructions for downloading the data to the PDL.
The position of the FMC select switch determines which FMC gives the download data.
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737-700 MAINTENANCE TRAINING MANUAL

 

 

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FMCS BITE PAGES - BITE ENTRY

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737-700 MAINTENANCE TRAINING MANUAL

FMCS BITE PAGES - AUTOMATIC BITE ENTRY
General
At start-up on the ground, the primary and secondary FMCs compare this information over the intersystem bus from one FMC to the other:
-Operational flight programs (OFP)
-Navigation data base
-Supplemental navigation data base
-Model/Engine data base
-ACARS datalink data base
-Software options data base
-Analog discretes/program pins
-Performance factors.

Ground Start-up
If the two OFPs do not agree, the primary FMC shows the OP PROGRAM CROSSLOAD page. You use this page to crossload the correct OFP.
If the databases do not agree, a crossload page for that particular database shows on the MCDU.
If an analog discrete/program pin or a performance factor does not agree, the analog discrete or the performance factor page shows. A highlight shows around the item that does not agree.
If you exit BITE before corrective action is taken, the secondary FMC is conditionally failed and the message SINGLE FMC OPERATION shows in the scratchpad on the MCDUs.
In Flight Restarts
For in flight restarts, the two FMCs also compare their information. If the information does not agree, the secondary FMC is conditionally failed and the message SINGLE FMC OPERATION shows in the scratchpad on the MCDUs.
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737-700 MAINTENANCE TRAINING MANUAL

DIFFERENCE HAS DIFFERENCE HAS HIGHLIGHT
HIGHLIGHT

 

ANALOG DISCRETES PERFORMANCE FACTORS
DISAGREE AT POWER UP DISAGREE AT POWER UP

NAV DATABASE OPERATION FLIGHT PROGRAM DISAGREE AT POWER UP DISAGREE AT POWER UP
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FMCS BITE PAGES -AUTOMATIC BITE ENTRY

January 2005
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved

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SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL

　
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