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To do a check of the inflight faults, select LSK 2L. 
To operate a ground test, select LSK 3L. You can not operate a ground test if the engines are on because there is no carrot for LSK 3L. 

A31-62-00-802.fm
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL

MINT BITE INDEX 1/ 1
A <FMC ENGINES <DFCS APU <T FQIS
A/ <ADIRS <CDS <INDEX DE INDEX 1/ 1

CS BIT <DEU 1 <DEU 2
<INDEX

CSDEU
D 1MAINT/BITE MAIN MENU 1/ 1 <CURRENT STATUS <INFLIGHT FAULTS <GROUND TESTS <IDENT/CONFIG <INPUT MONITORING
DISCRETE STATUS <INDEX
A31-62-00-802.fm
CDS BITE PAGES -CDS BITE MAIN MENU
January 2005
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL
CDS BITE PAGES - CURRENT STATUS
General
To do a check of the current status, select CURRENT STATUS on line select key (LSK) 1L from the CDS MAIN MENU. This shows the CURRENT STATUS page.
Any active faults detected by the DEU shows.
CURRENT STATUS Page
A single fault shows on a page. The number of current status pages show on the top right. The number of pages is the number of current status faults. To show the next current status fault, select the NEXT PAGE key on the FMC MCDU keypad.
The faults show in the order that the DEU detects the faults. If the DEU detects a new fault while current faults show, the new fault page shows as the last page.
This information shows for a single fault:
-Maintenance message number
-Fault description
-Suspected LRUs.
The maintenance message number is a number assigned to this fault. You can use the maintenance message number index in the fault isolation manual (FIM) to find the correct fault isolation procedure to fix the fault.
The fault description is a short description of the fault.
The suspected LRUs are in the order of most likely to least likely LRUs that made the fault occur. You should use this information with the fault isolation manual to fix the fault.
If a fault goes inactive while the page shows, the message NOT ACTIVE shows instead of the suspected LRUs.
A31-62-00-803.fm
January 2005
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL

CSDEU1 M
D AINT/BITE MAIN MENU 1/ 1 <CURRENT STATUS <INFLIGHT FAULTS <GROUND TESTS <IDENT/CONFIG <INPUT MONITORING
DISCRETE STATUS <INDEX

MAINTENANCE
TOTAL NUMBER OF
CSDE 1 MAINT/BITE
DU
CURRENT STATUS 1/ 1

NO FAULTS
<INDEX

 

A31-62-00-803.fm
CDS BITE PAGES - CURRENT STATUS

January 2005
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
CDS BITE PAGES - INFLIGHT FAULTS
General
To do a check of the inflight faults, select INFLIGHT FAULTS on line select key (LSK) 2L from the CDS MAIN MENU. This shows the INFLIGHT FAULTS Leg Menu page.
The DEU stores faults for 64 flight legs. The DEU can store up to 32 faults for each flight leg.
A new flight leg starts when the airplane has an airspeed of more than 80 knots. The flight leg ends when the airspeed is less than 75 knots. If a fault occurs on the ground with engines off, the DEU shows the fault as a current fault in CURRENT STATUS. If the fault exists when a new flight leg starts, the DEU stores the fault in the new flight leg.
INFLIGHT FAULTS Leg Menu Page
The INFLIGHT FAULTS leg menu page shows a list of the flight legs that have faults in the DEU memory. The number of inflight faults for the flight leg shows next to the flight leg number. The time the flight leg started shows under the flight leg.
　
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