 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B737-200 was dispatched with the left main gear inboard tire and wheel assembly installed improperly.
| Attributes | |
| ACN | 409606 |
| Time | |
| Date | 199807 |
| Day | Mon |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | tower : dca |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 409606 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Installing a main left inboard tire assembly on air carrier ship xyz, a B737-200. The axle nut retainer ring was improperly installed. The maintenance manual states that the lock holes should align (between the nut and spacer), after torquing. This was not done. The retainer was installed through the spacer hole only, not the nut. This condition could allow the nut to loosen and back off until a nut corner contacts the retainer. The manual is clear on this step, right after torque procedure and I simply didn't read it carefully enough. Also, I had never done the operation before (lack of training). The aircraft was dispatched and no problems resulted before the condition was reworked. This was an honest oversight and I notified my supervisor as soon as I realized the installation was incorrect.
Original NASA ASRS Text
Title: A B737-200 WAS DISPATCHED WITH THE L MAIN GEAR INBOARD TIRE AND WHEEL ASSEMBLY INSTALLED IMPROPERLY.
Narrative: INSTALLING A MAIN L INBOARD TIRE ASSEMBLY ON ACR SHIP XYZ, A B737-200. THE AXLE NUT RETAINER RING WAS IMPROPERLY INSTALLED. THE MAINT MANUAL STATES THAT THE LOCK HOLES SHOULD ALIGN (BTWN THE NUT AND SPACER), AFTER TORQUING. THIS WAS NOT DONE. THE RETAINER WAS INSTALLED THROUGH THE SPACER HOLE ONLY, NOT THE NUT. THIS CONDITION COULD ALLOW THE NUT TO LOOSEN AND BACK OFF UNTIL A NUT CORNER CONTACTS THE RETAINER. THE MANUAL IS CLR ON THIS STEP, RIGHT AFTER TORQUE PROC AND I SIMPLY DIDN'T READ IT CAREFULLY ENOUGH. ALSO, I HAD NEVER DONE THE OP BEFORE (LACK OF TRAINING). THE ACFT WAS DISPATCHED AND NO PROBS RESULTED BEFORE THE CONDITION WAS REWORKED. THIS WAS AN HONEST OVERSIGHT AND I NOTIFIED MY SUPVR AS SOON AS I REALIZED THE INSTALLATION WAS INCORRECT.
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.