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Air carrier maintenance technician reported that a component was dropped from the B737 wheel well ceiling and punctured a hydraulic reservoir.
| Attributes | |
| ACN | 1544719 |
| Time | |
| Date | 201805 |
| Local Time Of Day | 0001-0600 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Brake System |
| Person 1 | |
| Function | Technician |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy |
Narrative:
[I] was assigned the aircraft with one other amt to accomplish planned maintenance visit and three mels. One of the mels was for autobrake do not arm light illuminates when selecting modes 1-Max.after troubleshooting system ie. Bite of autobrake anti-skid control unit; determined solenoid in the a/B (autobrake) pressure control module was faulting. It was at this time a decision was made to replace a/B pressure control module.while removing component from ceiling in main wheel well; it slipped out of my hands; bounced around in wheel well and fell to the ramp. It was then I noticed [the] damage to the return line reducer fitting on the component. I then notified lead and management that fitting; that has to be transferred to new component; needs to be replaced. After searching for availability of reducer; it was discovered nis (not in stock) in ZZZ and would have to be a high priority part from ZZZ1 later that morning.I then proceeded back to the aircraft to organize hardware and cap open hydraulic lines knowing it would be several hours before component would be installed. It was then I noticed damage to the standby reservoir. A small puncture the shape of the return line reducer; weeping hydraulic fluid out the top of reservoir. I immediately notified lead and management of damage and made inquiry to availability of parts and location of a new standby reservoir. The aircraft was taken out of service.
Original NASA ASRS Text
Title: Air carrier Maintenance Technician reported that a component was dropped from the B737 wheel well ceiling and punctured a hydraulic reservoir.
Narrative: [I] was assigned the aircraft with one other AMT to accomplish Planned Maintenance Visit and three MELs. One of the MELs was for Autobrake do not arm light illuminates when selecting modes 1-Max.After troubleshooting system ie. bite of Autobrake Anti-Skid Control Unit; determined solenoid in the A/B (Autobrake) pressure control module was faulting. It was at this time a decision was made to replace A/B pressure control module.While removing component from ceiling in main wheel well; it slipped out of my hands; bounced around in wheel well and fell to the ramp. It was then I noticed [the] damage to the return line reducer fitting on the component. I then notified lead and management that fitting; that has to be transferred to new component; needs to be replaced. After searching for availability of reducer; it was discovered NIS (Not in Stock) in ZZZ and would have to be a High Priority Part from ZZZ1 later that morning.I then proceeded back to the aircraft to organize hardware and cap open hydraulic lines knowing it would be several hours before component would be installed. It was then I noticed damage to the standby reservoir. A small puncture the shape of the return line reducer; weeping hydraulic fluid out the top of reservoir. I immediately notified lead and management of damage and made inquiry to availability of parts and location of a new standby reservoir. The aircraft was taken out of service.
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.