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An MD80 in descent at FL230 declared an emergency and landed due to #1 engine high vibration and oil clog light illuminated.
| Attributes | |
| ACN | 480492 |
| Time | |
| Date | 200007 |
| Day | Sat |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : avp.airport |
| State Reference | PA |
| Altitude | msl single value : 23000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| 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 | descent : vacating altitude |
| Route In Use | enroute airway : j70.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 400 |
| ASRS Report | 480492 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 8000 flight time type : 4000 |
| ASRS Report | 480612 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : eng vibration monitor other flight crewa other flight crewb other other : 3 |
| Resolutory Action | flight crew : landed in emergency condition flight crew : declared emergency |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Descending from FL230 a buzzing vibration could be felt through the aircraft. Flight attendants reported pronounced vibration in aft cabin. The left engine vibration monitor picked up the vibration. Retarding the left throttle to idle had no effect, however, advancing it slightly caused the vibration to cease. With approach control, the left oil strainer clogging light illuminated with no other abnormal indications. Throttle was retarded per QRH, yet the light remained illuminated. An emergency was declared and equipment requested as a precaution. Due to proximity of airport and in order to avoid developing further unusual circumstances, the decision was made to land the aircraft and then shut the engine down at the completion of the landing roll. Maintenance found the oil strainer completely clogged with metal and on a subsequent maintenance runup for troubleshooting, the engine vibrated severely at 18% N2. The start was aborted, the engine to be removed.
Original NASA ASRS Text
Title: AN MD80 IN DSCNT AT FL230 DECLARED AN EMER AND LANDED DUE TO #1 ENG HIGH VIBRATION AND OIL CLOG LIGHT ILLUMINATED.
Narrative: DSNDING FROM FL230 A BUZZING VIBRATION COULD BE FELT THROUGH THE ACFT. FLT ATTENDANTS RPTED PRONOUNCED VIBRATION IN AFT CABIN. THE L ENG VIBRATION MONITOR PICKED UP THE VIBRATION. RETARDING THE L THROTTLE TO IDLE HAD NO EFFECT, HOWEVER, ADVANCING IT SLIGHTLY CAUSED THE VIBRATION TO CEASE. WITH APCH CTL, THE L OIL STRAINER CLOGGING LIGHT ILLUMINATED WITH NO OTHER ABNORMAL INDICATIONS. THROTTLE WAS RETARDED PER QRH, YET THE LIGHT REMAINED ILLUMINATED. AN EMER WAS DECLARED AND EQUIP REQUESTED AS A PRECAUTION. DUE TO PROX OF ARPT AND IN ORDER TO AVOID DEVELOPING FURTHER UNUSUAL CIRCUMSTANCES, THE DECISION WAS MADE TO LAND THE ACFT AND THEN SHUT THE ENG DOWN AT THE COMPLETION OF THE LNDG ROLL. MAINT FOUND THE OIL STRAINER COMPLETELY CLOGGED WITH METAL AND ON A SUBSEQUENT MAINT RUNUP FOR TROUBLESHOOTING, THE ENG VIBRATED SEVERELY AT 18% N2. THE START WAS ABORTED, THE ENG TO BE REMOVED.
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.