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An air carrier large transport landed en route because of an oil filter bypass on 1 of the engines. Fuel was dumped.
| Attributes | |
| ACN | 236668 |
| Time | |
| Date | 199303 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 110 flight time total : 7500 flight time type : 5000 |
| ASRS Report | 236668 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : declared emergency flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Day VFR FL310 approximately PM55 EST 230 NM northwest of atlanta VOR. Captain noticed #3 engine oil filter bypass light illuminated. #3 engine throttle was slowly retarded to idle. #3 oil filter bypass light remained on. The jump seat was occupied by a qualified first officer who volunteered to coordinate communication with atlanta operations, advising them of our problem and intention to divert to atl. The situation was also coordinated with an atlanta maintenance representative. Captain and so continued to work the abnormal while I flew the aircraft and communicated with ATC. Captain opted to proceed direct atl and requested a descent into atl for a precautionary landing. Approximately 9000 pounds of fuel was dumped 85 NM north of atl at 22000 ft. Since all other engine indications on #3 engine were normal, #3 engine was left at idle. An uneventful landing and rollout was completed at atl. Aircraft and maintenance changed out the oil filter. Aircraft was late ground turned with no recurrence of the engine oil filter bypass light. The flight was later ferried to houston (no passenger or flight attendants) the light did not reoccur.
Original NASA ASRS Text
Title: AN ACR LGT LANDED ENRTE BECAUSE OF AN OIL FILTER BYPASS ON 1 OF THE ENGS. FUEL WAS DUMPED.
Narrative: DAY VFR FL310 APPROX PM55 EST 230 NM NW OF ATLANTA VOR. CAPT NOTICED #3 ENG OIL FILTER BYPASS LIGHT ILLUMINATED. #3 ENG THROTTLE WAS SLOWLY RETARDED TO IDLE. #3 OIL FILTER BYPASS LIGHT REMAINED ON. THE JUMP SEAT WAS OCCUPIED BY A QUALIFIED FO WHO VOLUNTEERED TO COORDINATE COM WITH ATLANTA OPS, ADVISING THEM OF OUR PROB AND INTENTION TO DIVERT TO ATL. THE SIT WAS ALSO COORDINATED WITH AN ATLANTA MAINT REPRESENTATIVE. CAPT AND SO CONTINUED TO WORK THE ABNORMAL WHILE I FLEW THE ACFT AND COMMUNICATED WITH ATC. CAPT OPTED TO PROCEED DIRECT ATL AND REQUESTED A DSCNT INTO ATL FOR A PRECAUTIONARY LNDG. APPROX 9000 LBS OF FUEL WAS DUMPED 85 NM N OF ATL AT 22000 FT. SINCE ALL OTHER ENG INDICATIONS ON #3 ENG WERE NORMAL, #3 ENG WAS LEFT AT IDLE. AN UNEVENTFUL LNDG AND ROLLOUT WAS COMPLETED AT ATL. ACFT AND MAINT CHANGED OUT THE OIL FILTER. ACFT WAS LATE GND TURNED WITH NO RECURRENCE OF THE ENG OIL FILTER BYPASS LIGHT. THE FLT WAS LATER FERRIED TO HOUSTON (NO PAX OR FLT ATTENDANTS) THE LIGHT DID NOT REOCCUR.
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.