<< >> NASA ASRS Report 628475, August 2004

A B737-500 during a 'B' check upper wing fasteners were found corroded and written up by an inspector. Engineering wrote up a repair that was in conflict with the inspector's write-up.

Attributes
ACN	628475
Time
Date	200408
Day	Wed
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-500
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : inspector
Qualification	technician : airframe technician : powerplant
ASRS Report	628475
Person 2
Affiliation	company : air carrier
Function	other personnel other
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : engineering procedure contributing factor : work cards performance deficiency : repair performance deficiency : inspection performance deficiency : scheduled maintenance
Supplementary
Problem Areas	Maintenance Human Performance Chart Or Publication Aircraft
Primary Problem	Chart Or Publication
Situations
Publication	Structural Repair Manual

Narrative:

On aug/wed/04, I was working aircraft X on l-hand wing when I found corrosion on upper surface of wing below overwing exit. I contacted quality control and engineering about the problem. Quality control wrote up nrc. Engineering said to blend until corrosion was removed. Once corrosion was removed engineering and quality control determined that the blended area was out of limits. At that time I was on hold until engineering came back with a revised repair. I then filled out a maintenance form telling what I had done. On the maintenance form I failed to write down that I blended on some fasteners. I didn't think it was important since we needed to open the wing tanks and prepare for a repair and dayshift was informed at turnover about the fasteners by my supervisor and quality control. In the future, we need to document more information and have better communication.

Related reports:

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Original NASA ASRS Text

Title: A B737-500 DURING A 'B' CHK UPPER WING FASTENERS WERE FOUND CORRODED AND WRITTEN UP BY AN INSPECTOR. ENGINEERING WROTE UP A REPAIR THAT WAS IN CONFLICT WITH THE INSPECTOR'S WRITE-UP.

Narrative: ON AUG/WED/04, I WAS WORKING ACFT X ON L-HAND WING WHEN I FOUND CORROSION ON UPPER SURFACE OF WING BELOW OVERWING EXIT. I CONTACTED QUALITY CTL AND ENGINEERING ABOUT THE PROB. QUALITY CTL WROTE UP NRC. ENGINEERING SAID TO BLEND UNTIL CORROSION WAS REMOVED. ONCE CORROSION WAS REMOVED ENGINEERING AND QUALITY CTL DETERMINED THAT THE BLENDED AREA WAS OUT OF LIMITS. AT THAT TIME I WAS ON HOLD UNTIL ENGINEERING CAME BACK WITH A REVISED REPAIR. I THEN FILLED OUT A MAINT FORM TELLING WHAT I HAD DONE. ON THE MAINT FORM I FAILED TO WRITE DOWN THAT I BLENDED ON SOME FASTENERS. I DIDN'T THINK IT WAS IMPORTANT SINCE WE NEEDED TO OPEN THE WING TANKS AND PREPARE FOR A REPAIR AND DAYSHIFT WAS INFORMED AT TURNOVER ABOUT THE FASTENERS BY MY SUPVR AND QUALITY CTL. IN THE FUTURE, WE NEED TO DOCUMENT MORE INFO AND HAVE BETTER COM.

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.