 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B737-800 left hydraulic low pressure light report was corrected by the engine driven pump change. Log page signoff had incorrect details on pump.
| Attributes | |
| ACN | 608611 |
| Time | |
| Date | 200402 |
| Day | Sun |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | ground : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 13.5 |
| ASRS Report | 608611 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : low press warn light other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
The night of feb/sat/04, myself and mr X were assigned to work aircraft X. Pilot reported #1 engine driven hydraulic pump low pressure light illuminated. Log page # xxxxx. We first opened the #1 engine cowling and then found the engine hydraulic pump leaking. We removed and replaced the engine hydraulic pump in accordance with maintenance manual 29-11-11. I felt the leaking hydraulic pump was the problem, so no further troubleshooting was required. We ran the engine to operations check and leak checked the pump. No problems were detected or noted. I signed off the log page by stating the pump had internally failed. I misworded that my intent was to say the pump was leaking, causing the low pressure light in the cockpit.
Original NASA ASRS Text
Title: A B737-800 L HYD LOW PRESSURE LIGHT RPT WAS CORRECTED BY THE ENG DRIVEN PUMP CHANGE. LOG PAGE SIGNOFF HAD INCORRECT DETAILS ON PUMP.
Narrative: THE NIGHT OF FEB/SAT/04, MYSELF AND MR X WERE ASSIGNED TO WORK ACFT X. PLT RPTED #1 ENG DRIVEN HYD PUMP LOW PRESSURE LIGHT ILLUMINATED. LOG PAGE # XXXXX. WE FIRST OPENED THE #1 ENG COWLING AND THEN FOUND THE ENG HYD PUMP LEAKING. WE REMOVED AND REPLACED THE ENG HYD PUMP IN ACCORDANCE WITH MAINT MANUAL 29-11-11. I FELT THE LEAKING HYD PUMP WAS THE PROB, SO NO FURTHER TROUBLESHOOTING WAS REQUIRED. WE RAN THE ENG TO OPS CHK AND LEAK CHKED THE PUMP. NO PROBS WERE DETECTED OR NOTED. I SIGNED OFF THE LOG PAGE BY STATING THE PUMP HAD INTERNALLY FAILED. I MISWORDED THAT MY INTENT WAS TO SAY THE PUMP WAS LEAKING, CAUSING THE LOW PRESSURE LIGHT IN THE COCKPIT.
Data retrieved from NASA's ASRS site as of July 2007 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.