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A line mechanic reported the # 3 brake and tire assembly on a B737-300 departed the aircraft on landing. The reporter and another mechanic had removed and replaced (right/right) the tire and brake earlier that day. The right landing gear inboard axle had sheared from a crack that originated at a brake mounting hole on the brake attach flange.
| Attributes | |
| ACN | 886537 |
| Time | |
| Date | 200906 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Landing |
| Component | |
| Aircraft Component | Main Gear |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
My partner and I installed the # 3 main landing gear (medium large transport) tire and brake assemblies per the maintenance manual (MM). We used the maintenance manual and torqued the brake with a torque wrench and used the proper sequence. It was brought to my attention that the brake and axle assembly were part of a report that the brake and wheel assembly had left the aircraft on landing due to a fractured axle that had started from the brake attach flange. It was not said that my partner and myself were being reprimanded for any wrong doing. During a fact finding meeting we were the last to install the brake assembly. The tire assembly was recently removed and replaced (right/right). The fact finding meeting could not confirmed what and why the gear broke other than where the crack was.
Original NASA ASRS Text
Title: A Line Mechanic reported the # 3 Brake and Tire assembly on a B737-300 departed the aircraft on landing. The reporter and another mechanic had removed and replaced (R/R) the tire and brake earlier that day. The right landing gear inboard axle had sheared from a crack that originated at a brake mounting hole on the brake attach flange.
Narrative: My partner and I installed the # 3 Main Landing Gear (MLG) tire and brake assemblies per the Maintenance Manual (MM). We used the Maintenance Manual and torqued the brake with a torque wrench and used the proper sequence. It was brought to my attention that the brake and axle assembly were part of a report that the brake and wheel assembly had left the aircraft on landing due to a fractured axle that had started from the brake attach flange. It was not said that my partner and myself were being reprimanded for any wrong doing. During a fact finding meeting we were the last to install the brake assembly. The tire assembly was recently removed and replaced (R/R). The fact finding meeting could not confirmed what and why the gear broke other than where the crack was.
Data retrieved from NASA's ASRS site as of April 2012 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.