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A B737-700 experienced significant vibration in the right engine which became excessive and illuminated the oil filter bypass light when thrust was reduced to idle per the vibration checklist. The flight crew declared an emergency; shut down the engine and diverted to a nearby airport.
| Attributes | |
| ACN | 1050001 |
| Time | |
| Date | 201211 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Turbine Engine |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 157 Flight Crew Type 19000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Flight was uneventful until we had been at cruise; FL380; for about 40 minutes. Number 2 engine vibrations had been at .4 and vibration went to 1.7 accompanied by a slight grinding type noise from number 2 engine. After about 45 seconds the noise stopped; vibrations stayed at 1.7; and all indications remained normal until about 180 miles east of our destination. ATC gave us a descent to FL360. When power was retarded; the vibrations went to 3.5 accompanied by a grinding noise from number 2 engine. Shortly thereafter; the number 2 engine oil filter bypass light illuminated. Per the QRH; we retarded the power slowly. The oil filter bypass light remained on even after power had been at idle for a short time. We shut down the engine and diverted to a nearby airport. An emergency was declared and the divert and landing were uneventful. After exiting the runway; crash fire rescue equipment personnel examined the exterior of the number 2 engine and the aircraft in general and advised there was no visible damage. We taxied to the gate and deplaned the passengers. A subsequent inspection discovered obvious internal engine damage.
Original NASA ASRS Text
Title: A B737-700 experienced significant vibration in the right engine which became excessive and illuminated the oil filter bypass light when thrust was reduced to idle per the vibration checklist. The flight crew declared an emergency; shut down the engine and diverted to a nearby airport.
Narrative: Flight was uneventful until we had been at cruise; FL380; for about 40 minutes. Number 2 engine vibrations had been at .4 and vibration went to 1.7 accompanied by a slight grinding type noise from Number 2 engine. After about 45 seconds the noise stopped; vibrations stayed at 1.7; and all indications remained normal until about 180 miles east of our destination. ATC gave us a descent to FL360. When power was retarded; the vibrations went to 3.5 accompanied by a grinding noise from Number 2 engine. Shortly thereafter; the Number 2 engine oil filter bypass light illuminated. Per the QRH; we retarded the power slowly. The oil filter bypass light remained on even after power had been at idle for a short time. We shut down the engine and diverted to a nearby airport. An emergency was declared and the divert and landing were uneventful. After exiting the runway; CFR personnel examined the exterior of the Number 2 engine and the aircraft in general and advised there was no visible damage. We taxied to the gate and deplaned the passengers. A subsequent inspection discovered obvious internal engine damage.
Data retrieved from NASA's ASRS site as of July 2013 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.