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C340 pilot reported that the left engine had a catastrophic internal failure and then failed to feather. Aircraft landed with no other issues after an emergency was declared.
| Attributes | |
| ACN | 1021721 |
| Time | |
| Date | 201208 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Cessna 340/340A |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Engine |
| Person 1 | |
| Function | Pilot Flying Single Pilot |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 130 Flight Crew Total 14500 Flight Crew Type 1200 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Left engine started running very rough for approximately 10 seconds followed by an immediate seizure. Propeller was not able to feather. [I] declared an emergency with ATC. Aircraft returned to land at [departure airport]. Emergency vehicles were dispatched. Aircraft landed normally. Aircraft taxied under own power to FBO. After quick inspection of the left engine it was evident an internal catastrophic failure had occurred with the crankcase being broken near the #2 cylinder with evidence of a broken connecting rod. Further investigation and analysis will be required for a proper cause. No other damage done to the aircraft.
Original NASA ASRS Text
Title: C340 pilot reported that the left engine had a catastrophic internal failure and then failed to feather. Aircraft landed with no other issues after an emergency was declared.
Narrative: Left engine started running very rough for approximately 10 seconds followed by an immediate seizure. Propeller was not able to feather. [I] declared an emergency with ATC. Aircraft returned to land at [departure airport]. Emergency vehicles were dispatched. Aircraft landed normally. Aircraft taxied under own power to FBO. After quick inspection of the left engine it was evident an internal catastrophic failure had occurred with the crankcase being broken near the #2 cylinder with evidence of a broken connecting rod. Further investigation and analysis will be required for a proper cause. No other damage done to the aircraft.
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.