 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B757-200 was released for service after #4 main brake was replaced. On first landing #4 brake spun on axle due to brake rod not secured.
| Attributes | |
| ACN | 691462 |
| Time | |
| Date | 200603 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 16 |
| ASRS Report | 691462 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | oversight : supervisor |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : 2 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : logbook entry performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Chart Or Publication Environmental Factor Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On mar/wed/05; aircraft X was in ZZZ1 for layover check. The #4 main brake was found worn to limits. The #4 main brake was changed per the aircraft maintenance manual. On mar/thu/06; I was informed that aircraft X landed in ZZZ2 on flight abc and that the brake rod was found disconnected from #4 main brake and that the brake had spun resulting in damage to the hydraulic and electrical lines. When I was told this I thought what would make the brake spin on the axle. The first thing I thought of was that the pin had come loose of the brake rod. I know for a fact that the pin was installed because I installed the cotter pin for the bolt and castle nut that holds the pin in. The second thing that I thought of was that the end cap may not have been installed and by not installing this part although the bolt and nut were installed; the pin could just come out; but I cannot verify this and third the bolt just broke.
Original NASA ASRS Text
Title: A B757-200 WAS RELEASED FOR SVC AFTER #4 MAIN BRAKE WAS REPLACED. ON FIRST LNDG #4 BRAKE SPUN ON AXLE DUE TO BRAKE ROD NOT SECURED.
Narrative: ON MAR/WED/05; ACFT X WAS IN ZZZ1 FOR LAYOVER CHK. THE #4 MAIN BRAKE WAS FOUND WORN TO LIMITS. THE #4 MAIN BRAKE WAS CHANGED PER THE ACFT MAINT MANUAL. ON MAR/THU/06; I WAS INFORMED THAT ACFT X LANDED IN ZZZ2 ON FLT ABC AND THAT THE BRAKE ROD WAS FOUND DISCONNECTED FROM #4 MAIN BRAKE AND THAT THE BRAKE HAD SPUN RESULTING IN DAMAGE TO THE HYD AND ELECTRICAL LINES. WHEN I WAS TOLD THIS I THOUGHT WHAT WOULD MAKE THE BRAKE SPIN ON THE AXLE. THE FIRST THING I THOUGHT OF WAS THAT THE PIN HAD COME LOOSE OF THE BRAKE ROD. I KNOW FOR A FACT THAT THE PIN WAS INSTALLED BECAUSE I INSTALLED THE COTTER PIN FOR THE BOLT AND CASTLE NUT THAT HOLDS THE PIN IN. THE SECOND THING THAT I THOUGHT OF WAS THAT THE END CAP MAY NOT HAVE BEEN INSTALLED AND BY NOT INSTALLING THIS PART ALTHOUGH THE BOLT AND NUT WERE INSTALLED; THE PIN COULD JUST COME OUT; BUT I CANNOT VERIFY THIS AND THIRD THE BOLT JUST BROKE.
Data retrieved from NASA's ASRS site as of January 2009 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.