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An MD80 was dispatched in non compliance with #1 main tire and wheel assembly replaced but axle nut torqued to wrong value.
| Attributes | |
| ACN | 631672 |
| Time | |
| Date | 200409 |
| Day | Mon |
| 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 | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 631672 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 631673 |
| Events | |
| Anomaly | aircraft equipment problem : critical 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 | contributing factor : work cards contributing factor : manuals performance deficiency : non compliance with legal requirements performance deficiency : logbook entry performance deficiency : installation |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Chart Or Publication Aircraft Company |
| Primary Problem | Chart Or Publication |
Narrative:
While changing an MD80 main tire, I was unaware of different torque values of different axle nuts. I didn't realize that the axle nut on aircraft X was different from other company MD80's. I did not see the mechanic take apart the hub and axle nut to notice. When he put it back together I noticed 1 screw only on the axle nut that was safely was to the nut. We torqued the axle nut to company maintenance manual, wheel and tire torque values.
Original NASA ASRS Text
Title: AN MD80 WAS DISPATCHED IN NON COMPLIANCE WITH #1 MAIN TIRE AND WHEEL ASSEMBLY REPLACED BUT AXLE NUT TORQUED TO WRONG VALUE.
Narrative: WHILE CHANGING AN MD80 MAIN TIRE, I WAS UNAWARE OF DIFFERENT TORQUE VALUES OF DIFFERENT AXLE NUTS. I DIDN'T REALIZE THAT THE AXLE NUT ON ACFT X WAS DIFFERENT FROM OTHER COMPANY MD80'S. I DID NOT SEE THE MECH TAKE APART THE HUB AND AXLE NUT TO NOTICE. WHEN HE PUT IT BACK TOGETHER I NOTICED 1 SCREW ONLY ON THE AXLE NUT THAT WAS SAFELY WAS TO THE NUT. WE TORQUED THE AXLE NUT TO COMPANY MAINT MANUAL, WHEEL AND TIRE TORQUE VALUES.
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.