|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||airport : zzz.airport|
|Altitude||agl single value : 0|
|Operator||common carrier : air carrier|
|Make Model Name||B737-400|
|Operating Under FAR Part||Part 121|
|Flight Phase||ground : preflight|
ground : parked
ground : maintenance
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Anomaly||aircraft equipment problem : less severe|
maintenance problem : non compliance with mel
non adherence : far
non adherence : published procedure
|Independent Detector||other flight crewa|
other flight crewb
|Resolutory Action||none taken : detected after the fact|
|Maintenance||contributing factor : schedule pressure|
performance deficiency : non compliance with legal requirements
performance deficiency : logbook entry
|Problem Areas||Flight Crew Human Performance|
Maintenance Human Performance
Chart Or Publication
|Primary Problem||Maintenance Human Performance|
The MEL on this aircraft was very confusing and apparently incorrect. The write-up as I recall was that the light on the first officer's mcdu 1L line select key would not go out. All other functions regarding the FMC and ACARS worked fine. When we took delivery of the airplane, there were 2 MEL's associated with this problem. One regarding the ACARS and one regarding the mcdu light. However, the stickers were incorrectly labeled. I was told the stickers said navigation display map light. The logbook entries were correctly signed off and the daily was correctly completed. Apparently, the next crew discovered the MEL was incorrectly labeled and the logbook was corrected. A lot of confusion for a light bulb on the mcdu that would not extinguish.
Original NASA ASRS Text
Title: A B737-400 WAS DISPATCHED IN NON COMPLIANCE WITH 2 DEFERRED ITEMS ON CTL PANEL LIGHTS PER THE MEL. PLACARDS WERE INCORRECT AND CONFLICTING.
Narrative: THE MEL ON THIS ACFT WAS VERY CONFUSING AND APPARENTLY INCORRECT. THE WRITE-UP AS I RECALL WAS THAT THE LIGHT ON THE FO'S MCDU 1L LINE SELECT KEY WOULD NOT GO OUT. ALL OTHER FUNCTIONS REGARDING THE FMC AND ACARS WORKED FINE. WHEN WE TOOK DELIVERY OF THE AIRPLANE, THERE WERE 2 MEL'S ASSOCIATED WITH THIS PROB. ONE REGARDING THE ACARS AND ONE REGARDING THE MCDU LIGHT. HOWEVER, THE STICKERS WERE INCORRECTLY LABELED. I WAS TOLD THE STICKERS SAID NAV DISPLAY MAP LIGHT. THE LOGBOOK ENTRIES WERE CORRECTLY SIGNED OFF AND THE DAILY WAS CORRECTLY COMPLETED. APPARENTLY, THE NEXT CREW DISCOVERED THE MEL WAS INCORRECTLY LABELED AND THE LOGBOOK WAS CORRECTED. A LOT OF CONFUSION FOR A LIGHT BULB ON THE MCDU THAT WOULD NOT EXTINGUISH.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.