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A B737-200 seat shop technician reports replacing and relocating seat diaphragms without an approved procedure.
| Attributes | |
| ACN | 613787 |
| Time | |
| Date | 200403 |
| Day | Fri |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 613787 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : manuals performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
ZZZ interior shop repaired/refurbished B737-200 seats for our fleet. The ZZZ inspection department performed a final inspection of the seat upon the completion of the repair per the shop service order reference the task card. I have just become aware of a situation associated with the repair of these seats. In some instances the seat diaphragms have been removed, due to loose rivets, repositioned and support tubes re-drilled. This has been accomplished without addressing the original drilled holes in the support tube assemblies. The original holes drilled into the support tube are then covered by the seat diaphragms. Outward appearance is a properly installed and secure installation. The reason the inspection process has missed this issue in the past is due to the fact that the seat is in a repaired/completed condition and awaiting the final inspection. I was led to believe only the loose rivets were being replaced, not that they were drilling and relocation of the seat diaphragms without an approved procedure.
Original NASA ASRS Text
Title: A B737-200 SEAT SHOP TECHNICIAN RPTS REPLACING AND RELOCATING SEAT DIAPHRAGMS WITHOUT AN APPROVED PROC.
Narrative: ZZZ INTERIOR SHOP REPAIRED/REFURBISHED B737-200 SEATS FOR OUR FLEET. THE ZZZ INSPECTION DEPT PERFORMED A FINAL INSPECTION OF THE SEAT UPON THE COMPLETION OF THE REPAIR PER THE SHOP SVC ORDER REF THE TASK CARD. I HAVE JUST BECOME AWARE OF A SIT ASSOCIATED WITH THE REPAIR OF THESE SEATS. IN SOME INSTANCES THE SEAT DIAPHRAGMS HAVE BEEN REMOVED, DUE TO LOOSE RIVETS, REPOSITIONED AND SUPPORT TUBES RE-DRILLED. THIS HAS BEEN ACCOMPLISHED WITHOUT ADDRESSING THE ORIGINAL DRILLED HOLES IN THE SUPPORT TUBE ASSEMBLIES. THE ORIGINAL HOLES DRILLED INTO THE SUPPORT TUBE ARE THEN COVERED BY THE SEAT DIAPHRAGMS. OUTWARD APPEARANCE IS A PROPERLY INSTALLED AND SECURE INSTALLATION. THE REASON THE INSPECTION PROCESS HAS MISSED THIS ISSUE IN THE PAST IS DUE TO THE FACT THAT THE SEAT IS IN A REPAIRED/COMPLETED CONDITION AND AWAITING THE FINAL INSPECTION. I WAS LED TO BELIEVE ONLY THE LOOSE RIVETS WERE BEING REPLACED, NOT THAT THEY WERE DRILLING AND RELOCATION OF THE SEAT DIAPHRAGMS WITHOUT AN APPROVED PROC.
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.