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A lead mechanic and another mechanic report on their involvement with an engine driven hydraulic pump (edp) change on a B747-400. Numerous in-flight write-ups for engine pump temperature indications had occurred after the pump change. Case drain line fitting on pump found still capped-off; without the case drain line connected to pump.
| Attributes | |
| ACN | 847894 |
| Time | |
| Date | 200907 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Dawn |
| Aircraft 1 | |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Hydraulic System Pump |
| Person 1 | |
| Function | Lead Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural Maintenance Deviation - Procedural FAR |
Narrative:
Signed-off maintenance item in error. .... We were robbing a quick disconnect (line) from spare engine; trying as usual to make on-time departure; robbed disconnect and installed. I signed-off card (stating) installed disconnect. Did not read the whole job card.... I was led to believe that the disconnect was the final fix....
Original NASA ASRS Text
Title: A Lead Mechanic and another Mechanic report on their involvement with an engine driven hydraulic pump (EDP) change on a B747-400. Numerous in-flight write-ups for engine pump temperature indications had occurred after the pump change. Case drain line fitting on pump found still capped-off; without the case drain line connected to pump.
Narrative: Signed-off maintenance item in error. .... We were robbing a Quick Disconnect (line) from spare engine; trying as usual to make on-time departure; robbed disconnect and installed. I signed-off card (stating) installed disconnect. Did not read the whole job card.... I was led to believe that the disconnect was the final fix....
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.