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LR40 captain reports engine vibration at FL410 and elects to divert. Engine vibration becomes worse during descent and engine is shut down. Uneventful landing ensues.
| Attributes | |
| ACN | 816602 |
| Time | |
| Date | 200812 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 41000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air taxi |
| Make Model Name | Learjet 40 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer |
| ASRS Report | 816602 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : diverted to another airport flight crew : landed in emergency condition |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Cruising at FL410; began hearing and feeling a noise/vibration from the left side of aircraft. There were no abnormal indications at first. The noise became louder and then the emergency battery light began to flicker. I reduced the left power lever to idle and the noise/vibration went away. I decided to divert to ZZZ. Began a descent to ZZZ and the noise/vibration began again with the power lever still at idle. As noise got louder; I shut down the left engine. We landed in ZZZ with no further incident.
Original NASA ASRS Text
Title: LR40 Captain reports engine vibration at FL410 and elects to divert. Engine vibration becomes worse during descent and engine is shut down. Uneventful landing ensues.
Narrative: Cruising at FL410; began hearing and feeling a noise/vibration from the left side of aircraft. There were no abnormal indications at first. The noise became louder and then the emergency battery light began to flicker. I reduced the left power lever to idle and the noise/vibration went away. I decided to divert to ZZZ. Began a descent to ZZZ and the noise/vibration began again with the power lever still at idle. As noise got louder; I shut down the left engine. We landed in ZZZ with no further incident.
Data retrieved from NASA's ASRS site as of May 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.