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Technician reported unserviceable test equipment caused a misdiagnosis of a pitot/static problem and an aborted takeoff.
| Attributes | |
| ACN | 1722145 |
| Time | |
| Date | 202001 |
| Aircraft 1 | |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pitot-Static System |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
Tasked to work non routine ipad write up for failing first officer lower pitot/static system. The non-routine work history indicated the previous crew had troubleshot the cause down to the elevator feel computer. My work mate and I decided to do a test equipment test first to verify the integrity of the hoses and manifolds of the test unit. We found multiple problems with leaking hoses and a loose pitot connection.after obtaining a tight test system we performed a successful low range leak test of the lower probe. I signed off the write up as accomplished and noted the finding of bad test equipment on the sign off. I referenced the pitot/static [manuals] found on the job card that generated the non-routine.after the aborted takeoff on [date]; I was tasked with troubleshooting the first officer airspeed indication failure; associated with the upper first officer pitot probe. Upon removing the upper probe the quick disconnects for the pitot and 1 of 2 static lines partially engaged. Have pitot probe task cards amended to reflect the connection of the quick disconnects as an inspection item as per [company procedure].
Original NASA ASRS Text
Title: Technician reported unserviceable test equipment caused a misdiagnosis of a pitot/static problem and an aborted takeoff.
Narrative: Tasked to work non routine iPad write up for failing First Officer lower pitot/static system. The non-routine work history indicated the previous crew had troubleshot the cause down to the elevator feel computer. My work mate and I decided to do a test equipment test first to verify the integrity of the hoses and manifolds of the test unit. We found multiple problems with leaking hoses and a loose pitot connection.After obtaining a tight test system we performed a successful low range leak test of the lower probe. I signed off the write up as accomplished and noted the finding of bad test equipment on the sign off. I referenced the pitot/static [manuals] found on the job card that generated the non-routine.After the aborted takeoff on [date]; I was tasked with troubleshooting the First Officer airspeed indication failure; associated with the upper First Officer pitot probe. Upon removing the upper probe the quick disconnects for the pitot and 1 of 2 static lines partially engaged. Have pitot probe task cards amended to reflect the connection of the quick disconnects as an Inspection item as per [company procedure].
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.