Ive been quiet about Erik’s turbo failure as we hsve been talking privately since the date of tge incident. He did a great job, and i csn enphatize with him as i had a similar situation some years ago starting at FL 210 over mountains in winter, and like Erik, i declared an emergny, and made a power off landing at an airport. I, too, used the commercial spiral tk descend rapidly, as i was concerned about a potential fire. I assumed it was was a turbo failure, but ultimately that proved incorrect as i had failures of both the engine driven fuel pump and the dual electric back-up pump. Amazingly there was no panic here - just fly the airplane, and since I knew I could spiral down over an airport, I spent my time on concentrating on the commercial spiral, rather than trying a restart.
In another situation near the same area, I had the straight mineral oil (newly bebuilt engine in breakin) freeze and watched the oil pressure drop to the point to where I put the engine to idle and headed down from the flight levels to a nearby airport. This time at about 8000’ the oil pressure started back up, and I increased power to the point where I could make a normal landing.
in another instance I had to dead stick a Piper Dakota into an airport.
I mention these situations as things break even with great maintenance, and complacency is the enemy. Recurrent training, and practice at “what if” thinking on every flight can save you, and your passengers.
To return to the theme of this tread, after 2 231s and a 261 conversion I decided that I didn’t really need to fly in the flight levels - even out West. Over the years I spent a great deal of money in turbo maintenance and replacement with LASAR. At every annual I had the turbo serviced to new specifications, and had many components replaced. I always was careful about TITs, and always kept the engine cooling for 5 minutes after landing - maybe an old wife’s tale, but couldn’t hurt I did replace the turbos at 800 hours, and when I had the engine of the 261 rebuilt. The J I now fly in incapable of the Flight Levelx, but with careful routing I can still cross the country with reasonable speed, and without subjecting my self and the engine to the harsh conditions of the flight levels, and concerns about turbo failures. Life is full of compromises, and after decades of flying, I prefer the the simplicity of the J. Of course your needs may differ.