January 1, 2004
49-60
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL
APU CONTROLS - ELECTRONIC CONTROL UNIT -CURRENT STATUS NO FLIGHT DECK EFFECT The flight deck effect shows NO FLIGHT DECK EFFECT if the maintenance message does not cause a flight deck effect. OVERSPEED LIGHT The flight deck effect shows OVERSPEED LIGHT if the maintenance message causes the OVERSPEED light to come on. UNKNOWN FLT DECK EFFECT The flight deck effect shows UNKNOWN FLT DECK EFFECT if the maintenance message does not always cause a flight deck effect.
January 1, 2004
49-60
- 6 -
SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL
A49-60-00-010.fm
APU CONTROLS - ELECTRONIC CONTROL UNIT - CURRENT STATUS
January 1, 2004
49-60
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL
APU CONTROLS - ELECTRONIC CONTROL UNIT - FAULT HISTORY
A49-60-00-011.fm
General
The FAULT HISTORY page of APU MCDU BITE shows the cause for an APU protective shutdown. THE ECU stores up to 30 protective shutdowns that are up to 999 starts old.
Each occurrence of a protective shutdown shows on a page. The MCDU shows the page number of the protective shutdown in the upper right corner of the display followed by the total number of pages in FAULT HISTORY.
Select the NEXT PAGE button on the MCDU key pad to go to the next page. Select the PREV PAGE on the MCDU key pad to go to the previous page.
If you see > next to CURRENT STATUS the ECU found the maintenance message that causes this shutdown on a CURRENT STATUS page. To see the current status page select CURRENT STATUS.
Select OTHER OCCURRENCES to see a list of other APU start attempts with the same protective shutdown. If there are no other APU start attempts with the same protective shutdown, the ECU shows NO OTHER OCCURRENCES when you select the OTHER OCCURRENCES line select key.
Select INDEX to go to the MAIN MENU.
The FAULT HISTORY page gives the following information about the protective shutdown:
-Flight deck effect
-Maintenance message number(s)
-Description of up to two maintenance messages that the ECU
found causes the protective shutdown
- Protective shutdown name
- Date of the shutdown
- Time of the shutdown in Greenwich mean time
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