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A mechanic reported that when installing the #1 engine hydraulic pump he neglected to install the carbon seal causing engine loss of oil and an inflight shutdown.
| Attributes | |
| ACN | 1384153 |
| Time | |
| Date | 201608 |
| Local Time Of Day | 1801-2400 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Regional Jet 900 (CRJ900) |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Hydraulic System Pump |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy |
Narrative:
When reactivating/ installing new hydraulic engine driven pump on the #1 engine to clear a MEL on aircraft; the carbon seal was not reinstalled causing the #1 engine to have low oil pressure warning in flight and further causing an inflight engine shutdownthe amm (aircraft maintenance manual) and gpm (general procedures manual) form #XXX does not clearly identify what the carbon seal looks like or where it is actually installed. In the amm and form #XXX it says to remove screw item #57 and remove spline plug item #51 and since there was no picture of the carbon seal I assumed that the carbon seal was part of the spline plug not knowing it was the carbon seal I was supposed to be looking for[suggest] verbal training of where the mistake was made in the procedures. Also informed what the carbon seal is and where it is located.
Original NASA ASRS Text
Title: A Mechanic reported that when installing the #1 engine hydraulic pump he neglected to install the carbon seal causing engine loss of oil and an inflight shutdown.
Narrative: When reactivating/ installing new hydraulic engine driven pump on the #1 engine to clear a MEL on aircraft; the carbon seal was not reinstalled causing the #1 engine to have low oil pressure warning in flight and further causing an inflight engine shutdownThe AMM (Aircraft Maintenance Manual) and GPM (General Procedures Manual) form #XXX does not clearly identify what the carbon seal looks like or where it is actually installed. In the AMM and form #XXX it says to remove screw item #57 and remove spline plug item #51 and since there was no picture of the carbon seal I assumed that the carbon seal was part of the spline plug not knowing it was the carbon seal I was supposed to be looking for[Suggest] verbal training of where the mistake was made in the procedures. Also informed what the carbon seal is and where it is located.
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.