There have been mag failures where the Bendix mag came loose because the bolt holding its retaining bracket came loose.
As Pilot-DAR says, it isn't wirelocked, which is stupid, especially if it is
one of these which, if it works loose, stops the engine totally.
I always check the retaining bracket, on a preflight. Fortunately it is visible via the prop TKS refill cover.
There are also some muppets working in the maintenance business... I overhaul my dual mag every 500hrs, by
this firm. I have a spare one so just swap them over at the Annual.