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A DC9-80 returned to field due to loss of #2 engine oil and quantity. Replaced oil filter and filter cover 'O' ring seal. Flight returned again with loss of oil #2 engine. Found filter housing cracked.
| Attributes | |
| ACN | 637797 |
| Time | |
| Date | 200411 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll ground : taxi ground : parked ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 18 |
| ASRS Report | 637797 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 32 |
| ASRS Report | 637798 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : #2 eng oil qty and press other flight crewa |
| Resolutory Action | flight crew : diverted to another airport flight crew : landed in emergency condition other |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : inspection performance deficiency : repair performance deficiency : non compliance with legal requirements performance deficiency : logbook entry performance deficiency : fault isolation |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Maintenance was advised of flight returning to gate for low oil pressure/quantity. Upon aircraft arrival noticed left aft fuselage and #2 engine cowling covered with oil. Initial visual inspection showed no obvious leaks. Svced #2 engine oil quantity and 'spooled' engine. Oil immediately leaked from oil filter cover. Right and right 'O' rings and filter. Svced engine oil quantity to full. Reference maintenance manual 79-20-06. Ran engine to 70% N2 with no leaks noted. Filter housing failed on second flight after maintenance resulting in an in-flight engine shutdown and air return. Cause has not been determined. Callback conversation with reporter revealed the following information: the reporter would not talk about or give any details on this incident.
Original NASA ASRS Text
Title: A DC9-80 RETURNED TO FIELD DUE TO LOSS OF #2 ENG OIL AND QUANTITY. REPLACED OIL FILTER AND FILTER COVER 'O' RING SEAL. FLT RETURNED AGAIN WITH LOSS OF OIL #2 ENG. FOUND FILTER HOUSING CRACKED.
Narrative: MAINT WAS ADVISED OF FLT RETURNING TO GATE FOR LOW OIL PRESSURE/QUANTITY. UPON ACFT ARR NOTICED L AFT FUSELAGE AND #2 ENG COWLING COVERED WITH OIL. INITIAL VISUAL INSPECTION SHOWED NO OBVIOUS LEAKS. SVCED #2 ENG OIL QUANTITY AND 'SPOOLED' ENG. OIL IMMEDIATELY LEAKED FROM OIL FILTER COVER. R AND R 'O' RINGS AND FILTER. SVCED ENG OIL QUANTITY TO FULL. REF MAINT MANUAL 79-20-06. RAN ENG TO 70% N2 WITH NO LEAKS NOTED. FILTER HOUSING FAILED ON SECOND FLT AFTER MAINT RESULTING IN AN INFLT ENG SHUTDOWN AND AIR RETURN. CAUSE HAS NOT BEEN DETERMINED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR WOULD NOT TALK ABOUT OR GIVE ANY DETAILS ON THIS INCIDENT.
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.