CE550 captain reports in flight engine shutdown after generator failure accompanied with vibration a...

Narrative:

We were on descent when we began to both feel and hear vibration from the left engine. An intermittent loud noise came from the left side of the aircraft; which was followed by a left generator fail light. We ran the emergency checklist; but chose not to attempt to put the generator back online; as we were concerned about its mechanical integrity. We were in perfect VFR weather; and the other generator was capable of easily carrying the aircraft load. As we were concerned that the generator could come apart and cause further damage we elected to shut the left engine down. We used the emergency checklist to do so; and then declared an emergency with ATC and informed them of our situation. We were requested and were provided expedited handling into our destination airport. While this was not the closest airport; we still needed to descend; and we were fully set up for landing at this airport. Thus we proceeded; but maintained 10;000 ft until a safe landing was ensured.

Original NASA ASRS Text

Title: CE550 Captain reports in flight engine shutdown after generator failure accompanied with vibration and loud noise. Flight was in descent at the time and continued to destination after declaring an emergency.

Narrative: We were on descent when we began to both feel and hear vibration from the left engine. An intermittent loud noise came from the left side of the aircraft; which was followed by a left generator fail light. We ran the emergency checklist; but chose not to attempt to put the generator back online; as we were concerned about its mechanical integrity. We were in perfect VFR weather; and the other generator was capable of easily carrying the aircraft load. As we were concerned that the generator could come apart and cause further damage we elected to shut the left engine down. We used the emergency checklist to do so; and then declared an emergency with ATC and informed them of our situation. We were requested and were provided expedited handling into our destination airport. While this was not the closest airport; we still needed to descend; and we were fully set up for landing at this airport. Thus we proceeded; but maintained 10;000 FT until a safe landing was ensured.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	836683
Time
Date	200905
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Citation II S2/Bravo (C550)
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	Airway V1
Flight Plan	IFR
Component
Aircraft Component	AC Generation
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 90 Flight Crew Total 2300 Flight Crew Type 1800
Events
Anomaly	Aircraft Equipment Problem Critical

CE550 captain reports in flight engine shutdown after generator failure accompanied with vibration and loud noise. Flight was in descent at the time and continued to destination after declaring an emergency.