As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEATER FOUND INOPERABLE. FOUND THE IGNITION COIL HAD EXPLODED. THE END CAP HAD COME OFF WITH ENOUGH FORCE THAT IT BENT THE IGNITER OVER; THE OPPOSITE REACTION CAUSED THE COIL CAN TO GO AFT AND BREAK WIRES OFF MISCELLANEOUS PARTS IN THE COIL COVER. THE MOST SIGNIFICANT POINT WAS THAT FUEL WAS STILL BEING PUMPED INTO THE HEATER, BUT NOT BEING IGNITED.