<< >> NASA ASRS Report 651431, March 2005

A B737-400 had an open deferred item on the heads up guidance system not worked due to the failure to input the entire log page number in the maintenance computer.

Attributes
ACN	651431
Time
Date	200503
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	651431
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : non compliance with mel maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : repair
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Chart Or Publication
Primary Problem	Maintenance Human Performance

Narrative:

MEL for the heads-up guidance system on aircraft X after #4 window change in ZZZ1 found parts not correctly installed that prevented the combine from being properly installed. Cleared 2 maintenance write-ups for the deferred item which was log pages X and Y. The same pages came up when I looked in computer for deferred pages. The MEL sticker only had 4 numbers in the log page area of the sticker. I cleared only what came up as deferred and agreed with the main write-ups I had to work with. Nothing led me to log page Z or the MEL. This work was accomplished on the morning of mar/mon/05 from XA30-XC40. I called maintenance controller and told them of the MEL I was clearing at the time of signoff.

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Original NASA ASRS Text

Title: A B737-400 HAD AN OPEN DEFERRED ITEM ON THE HEADS UP GUIDANCE SYS NOT WORKED DUE TO THE FAILURE TO INPUT THE ENTIRE LOG PAGE NUMBER IN THE MAINT COMPUTER.

Narrative: MEL FOR THE HEADS-UP GUIDANCE SYS ON ACFT X AFTER #4 WINDOW CHANGE IN ZZZ1 FOUND PARTS NOT CORRECTLY INSTALLED THAT PREVENTED THE COMBINE FROM BEING PROPERLY INSTALLED. CLRED 2 MAINT WRITE-UPS FOR THE DEFERRED ITEM WHICH WAS LOG PAGES X AND Y. THE SAME PAGES CAME UP WHEN I LOOKED IN COMPUTER FOR DEFERRED PAGES. THE MEL STICKER ONLY HAD 4 NUMBERS IN THE LOG PAGE AREA OF THE STICKER. I CLRED ONLY WHAT CAME UP AS DEFERRED AND AGREED WITH THE MAIN WRITE-UPS I HAD TO WORK WITH. NOTHING LED ME TO LOG PAGE Z OR THE MEL. THIS WORK WAS ACCOMPLISHED ON THE MORNING OF MAR/MON/05 FROM XA30-XC40. I CALLED MAINT CTLR AND TOLD THEM OF THE MEL I WAS CLRING AT THE TIME OF SIGNOFF.

Data retrieved from NASA's ASRS site as of January 2009 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.