As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A GASKET RUPTURED BETWEEN THE POWERPLANT AND THE BLEED AIR TUBE. THIS ALLOWED HOT BLEED AIR TO BLOW DIRECTLY ON AN ENGINE FIRE DETECTOR. THE PILOTS, FOLLOWING MFG PROCEDURES, FEATHERED THE ENGINE AND DIVERTED FOR AN UNEVENTFUL LANDING.