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Both the maintenance technicians and the inspector failed to note a flawed installation of a clamp holding the left engine fuel pump to the fuel control unit. The error was discovered when a fuel leak developed in flight.
| Attributes | |
| ACN | 957105 |
| Time | |
| Date | 201106 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Powerplant Fuel Control |
| Person 1 | |
| Function | Technician |
| Person 2 | |
| Function | Technician |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
I was asked to help finish the installation of a fuel control on the number two engine. The weather was partly cloudy and cool and very windy. We were working on the ramp. The midnight shift had removed the fuel control and pump and replaced the carbon seals due to an oil leak. They also had replaced the engine fuel pump. We installed the fuel control and lines and asked for an inspection of the fuel control installation; which was done. We then ran the motor for five minutes and noted no leaks. The aircraft flew one leg with no problems. On the next flight; a transcontinental trip; the number two engine was shut down due to a fuel leak. The clamp holding the fuel control to the fuel pump was not installed correctly; had backed off the pump and caused the fuel leak.
Original NASA ASRS Text
Title: Both the maintenance technicians and the inspector failed to note a flawed installation of a clamp holding the left engine fuel pump to the fuel control unit. The error was discovered when a fuel leak developed in flight.
Narrative: I was asked to help finish the installation of a fuel control on the number two engine. The weather was partly cloudy and cool and very windy. We were working on the ramp. The midnight shift had removed the fuel control and pump and replaced the carbon seals due to an oil leak. They also had replaced the engine fuel pump. We installed the fuel control and lines and asked for an inspection of the fuel control installation; which was done. We then ran the motor for five minutes and noted no leaks. The aircraft flew one leg with no problems. On the next flight; a transcontinental trip; the number two engine was shut down due to a fuel leak. The clamp holding the fuel control to the fuel pump was not installed correctly; had backed off the pump and caused the fuel leak.
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.