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A DC10 immediately after takeoff returned to the field due to loss of oil quantity #2 engine. Prior to dispatch #2 engine 'B' sump gasket replaced.
| Attributes | |
| ACN | 644572 |
| Time | |
| Date | 200501 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Weather Elements | Rain |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 25 |
| ASRS Report | 644572 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance lead technician : 1 maintenance technician : 16 |
| ASRS Report | 644682 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : company policies non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : engine oil qty indicator other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport |
| Consequence | other Other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : weather performance deficiency : non compliance with legal requirements performance deficiency : testing performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance Weather |
| Primary Problem | Maintenance Human Performance |
Narrative:
In changing the 'B' sump gasket; the WX was a problem as it was raining; the sump is in a tight area and requires a slow pace of work. I was assigned job which required the 'B' sump gasket replaced. I changed the gasket and left the job open for engine run and leak check. The aircraft was a DC10. I believe; due to the slow pace of the work necessary to do the job; WX conditions should be taken into account and prepared for (ie; a tarp over engine). I believe the problem was caused by gasket material left on the 'B' sump flange; from the old gasket. A solution to the problem I feel would be to remove the complete line to facilitate cleaning and reinstallation of new gasket.
Original NASA ASRS Text
Title: A DC10 IMMEDIATELY AFTER TKOF RETURNED TO THE FIELD DUE TO LOSS OF OIL QUANTITY #2 ENG. PRIOR TO DISPATCH #2 ENG 'B' SUMP GASKET REPLACED.
Narrative: IN CHANGING THE 'B' SUMP GASKET; THE WX WAS A PROB AS IT WAS RAINING; THE SUMP IS IN A TIGHT AREA AND REQUIRES A SLOW PACE OF WORK. I WAS ASSIGNED JOB WHICH REQUIRED THE 'B' SUMP GASKET REPLACED. I CHANGED THE GASKET AND LEFT THE JOB OPEN FOR ENG RUN AND LEAK CHK. THE ACFT WAS A DC10. I BELIEVE; DUE TO THE SLOW PACE OF THE WORK NECESSARY TO DO THE JOB; WX CONDITIONS SHOULD BE TAKEN INTO ACCOUNT AND PREPARED FOR (IE; A TARP OVER ENG). I BELIEVE THE PROB WAS CAUSED BY GASKET MATERIAL LEFT ON THE 'B' SUMP FLANGE; FROM THE OLD GASKET. A SOLUTION TO THE PROB I FEEL WOULD BE TO REMOVE THE COMPLETE LINE TO FACILITATE CLEANING AND REINSTALLATION OF NEW GASKET.
Data retrieved from NASA's ASRS site as of January 2009 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.