Hi guys...
AA1400 suffered a "runaway" starter motor that ended up exploding out through the top of the engine, taking out the left generator and screwing up the left hydraulic system as well. If that wasn't bad enough, on finals the nose gear wouldn't extend so they performed a single engine go around and cranked it down manually, before landing without incident.
The start valve was wired shut (deferred) by maintenance a few days earlier. Somehow, the valve opened whilst the aircraft was climbing through 2500msl, and the ram air coming in the wrong entrance spun the starter up to a very high, destructive RPM that eventually made it come out through the top of the engine. That caused the fire and the damage.
This crew should be exempt from their recurrent training this year! Job well done.
73