[stackj]

I had the same problem in a 337B. Once the breakers started popping, I could not get them to stay set until the aircraft had been shut down for a while. It was maddening when they popped two different flights in instrument conditions. The fix in my case was one I wouldn't have expected.

The main alternator breakers (35 amp) were original equipment. I replaced both of them and have never had the problem again. Breakers tend to break down over the years, I guess.

Hope the fix is as simple for you.

See you in OK city?