Is there a PA-31 experienced A&P available on this forum?
Have a magneto issue to discuss.
Your profile is empty, BB, so you aren’t going to get much response.
Mine go to Falcon at Biggin, where they maintain at least five PA31s I can immediately think of, and they are very experienced in the the type (I first taxied a Chieftain into Falcon in 1985, from memory, when the current owner manager was about 4). I have been a satisfied customer with my own aircraft ever since.
I have never seen a “P” there, but I have seen loads of other pressurised twins, so I can’t imagine that makes a difference.
But, having said that, surely a TIO540 is a TIO540 and the mags will be much the same across all the many types that have them?