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Maintenance technician reported that while taxiing a B787-900; a main landing gear tire failed because the brake did not release.
| Attributes | |
| ACN | 1414250 |
| Time | |
| Date | 201701 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B787-900 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Component | |
| Aircraft Component | Brake System |
| Person 1 | |
| Function | Other / Unknown |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Tasked with the reposition of aircraft X from the gate to the hangar parking spot. I was in right seat [coworker] was in left seat. Aircraft had inbound write ups from previous flight; items for # 2 & 3 brake high temps and brakes #2 & 3 brake actuator faults. Accomplished checklists and pushed from gate; started engines. During taxi out [coworker] mentioned that more power was required to move aircraft for breakaway. At this time we opened the mcdu page for the gear to monitor gear and brake temps. Continued to taxi and there appeared to be a brake dragging; observed #2 brake temp increasing. Halfway to the hangar the #2 brake temp reached 5.8; #3 1.5 [and] all other brakes 0. While holding to cross active runway noticed #3 tire pressure go to zero along with tire pressure and brake temp message on mcdu. Continued taxi to hangar. Aircraft taxied normal without additional power. Parked aircraft and accomplished post walk around that revealed the #3 tire had deflated. Note: taxiway/ramp were wet from recent precipitation.tire failed because #3 brake did not release preventing #3 wheel from turning.
Original NASA ASRS Text
Title: Maintenance technician reported that while taxiing a B787-900; a Main Landing Gear tire failed because the brake did not release.
Narrative: Tasked with the reposition of Aircraft X from the gate to the hangar parking spot. I was in right seat [coworker] was in left seat. Aircraft had inbound write ups from previous flight; items for # 2 & 3 brake high temps and brakes #2 & 3 brake actuator faults. Accomplished checklists and pushed from gate; started engines. During taxi out [coworker] mentioned that more power was required to move aircraft for breakaway. At this time we opened the MCDU page for the gear to monitor gear and brake temps. Continued to taxi and there appeared to be a brake dragging; observed #2 brake temp increasing. Halfway to the hangar the #2 brake temp reached 5.8; #3 1.5 [and] all other brakes 0. While holding to cross active runway noticed #3 tire pressure go to zero along with tire pressure and brake temp message on MCDU. Continued taxi to hangar. Aircraft taxied normal without additional power. Parked aircraft and accomplished post walk around that revealed the #3 tire had deflated. Note: Taxiway/ramp were wet from recent precipitation.Tire failed because #3 brake did not release preventing #3 wheel from turning.
Data retrieved from NASA's ASRS site 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.