Jay Honeck wrote:
Anyway, what should I put on this stupid screw to stop it from
vibrating loose? LocTite? Another lock washer? There's no way to
safety wire it...

New phillips screw, new external tooth lockwasher, loctite (medium grade
removable type), add it to the list of inspection items when the cowl is
off the airplane.

There may be a drilled head screw/bolt you could use, but you mentioned
there is no way to safety wire it.....I assume that means nothing on the
back of the alternator to wire it to.

Steve