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A seat shop technician reports seat repair procedures do not address holes previously drilled in seat beam for diaphragm mounting.
| Attributes | |
| ACN | 613673 |
| Time | |
| Date | 200404 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| 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 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 613673 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 613676 |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : work cards contributing factor : engineering procedure performance deficiency : inspection |
Narrative:
Interior shop repairs/refurbishes B737-200 seats for our fleet. The ZZZ inspection department reviews the seat after it has been repaired on a shop service order with a job card. I have just become aware of a situation associated with the repair of these seats. We have found that the seat diaphragms have been removed, repositioned slightly, redrilled, and then reattached to the seat front and back beam assemblies with new hardware. This has been accomplished without addressing the original drilled holes in the beam assemblies. The reason the inspection process has missed this issue in the past is the fact that the seat is in a repaired condition prior to the inspection process happening. When the seat diaphragm is slightly shifted from the original position and the beam assembly is redrilled for new attach hardware the original holes are covered by the seat diaphragm installation. I was led to believe only the hardware was replaced.
Original NASA ASRS Text
Title: A SEAT SHOP TECHNICIAN RPTS SEAT REPAIR PROCS DO NOT ADDRESS HOLES PREVIOUSLY DRILLED IN SEAT BEAM FOR DIAPHRAGM MOUNTING.
Narrative: INTERIOR SHOP REPAIRS/REFURBISHES B737-200 SEATS FOR OUR FLEET. THE ZZZ INSPECTION DEPT REVIEWS THE SEAT AFTER IT HAS BEEN REPAIRED ON A SHOP SVC ORDER WITH A JOB CARD. I HAVE JUST BECOME AWARE OF A SIT ASSOCIATED WITH THE REPAIR OF THESE SEATS. WE HAVE FOUND THAT THE SEAT DIAPHRAGMS HAVE BEEN REMOVED, REPOSITIONED SLIGHTLY, REDRILLED, AND THEN REATTACHED TO THE SEAT FRONT AND BACK BEAM ASSEMBLIES WITH NEW HARDWARE. THIS HAS BEEN ACCOMPLISHED WITHOUT ADDRESSING THE ORIGINAL DRILLED HOLES IN THE BEAM ASSEMBLIES. THE REASON THE INSPECTION PROCESS HAS MISSED THIS ISSUE IN THE PAST IS THE FACT THAT THE SEAT IS IN A REPAIRED CONDITION PRIOR TO THE INSPECTION PROCESS HAPPENING. WHEN THE SEAT DIAPHRAGM IS SLIGHTLY SHIFTED FROM THE ORIGINAL POS AND THE BEAM ASSEMBLY IS REDRILLED FOR NEW ATTACH HARDWARE THE ORIGINAL HOLES ARE COVERED BY THE SEAT DIAPHRAGM INSTALLATION. I WAS LED TO BELIEVE ONLY THE HARDWARE WAS REPLACED.
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.