Narrative:

In cruise at 17000 ft the right engine started to run rough. ZDV was notified of the problem. I was handed off to ase approach and was descended to 16000 ft. Approximately 3 mins later the right engine failed. It was feathered and ATC was informed. Ase approach gave me a vector to the airport heading 315 degrees. Within 2 mins all electrical system in the aircraft failed. The heading was held for approximately 3 mins and the airport was not sighted. Knowing that the east slope was VFR, I turned the aircraft to a heading of 090 degrees and tried to maintain 16000 ft. The aircraft was icing and the turbulence was severe. After approximately 35 mins of flying, the aircraft would only maintain 14200 ft with 14000 ft mountain under the aircraft. Buena vista, co, airport was finally sighted and a landing was made. An investigation by the FAA out of denver was conducted the next day with no definite cause found. The aircraft was flown the next day to oklahoma city on a ferry permit, and it was found that the right engine magneto was bad. Tta C3400. Tt engine 400.

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Original NASA ASRS Text

Title: PLT OF AN SMT TWIN ENG ACFT EXPERIENCED R ENG FAILURE OVER HIGH MOUNTAINOUS TERRAIN, SUBSEQUENTLY FLEW INTO VMC AND LANDED AT THE NEAREST ARPT SIGHTED.

Narrative: IN CRUISE AT 17000 FT THE R ENG STARTED TO RUN ROUGH. ZDV WAS NOTIFIED OF THE PROB. I WAS HANDED OFF TO ASE APCH AND WAS DSNDED TO 16000 FT. APPROX 3 MINS LATER THE R ENG FAILED. IT WAS FEATHERED AND ATC WAS INFORMED. ASE APCH GAVE ME A VECTOR TO THE ARPT HDG 315 DEGS. WITHIN 2 MINS ALL ELECTRICAL SYS IN THE ACFT FAILED. THE HDG WAS HELD FOR APPROX 3 MINS AND THE ARPT WAS NOT SIGHTED. KNOWING THAT THE E SLOPE WAS VFR, I TURNED THE ACFT TO A HDG OF 090 DEGS AND TRIED TO MAINTAIN 16000 FT. THE ACFT WAS ICING AND THE TURB WAS SEVERE. AFTER APPROX 35 MINS OF FLYING, THE ACFT WOULD ONLY MAINTAIN 14200 FT WITH 14000 FT MOUNTAIN UNDER THE ACFT. BUENA VISTA, CO, ARPT WAS FINALLY SIGHTED AND A LNDG WAS MADE. AN INVESTIGATION BY THE FAA OUT OF DENVER WAS CONDUCTED THE NEXT DAY WITH NO DEFINITE CAUSE FOUND. THE ACFT WAS FLOWN THE NEXT DAY TO OKLAHOMA CITY ON A FERRY PERMIT, AND IT WAS FOUND THAT THE R ENG MAGNETO WAS BAD. TTA C3400. TT ENG 400.

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.