As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TROUBLESHOT HEATER SYSTEM, FOUND INTERMITTENT ELECTRIC FUEL PUMP, HEATER ALSO BACKFIRES PERIODICALLY WHEN STARTING. THIS IS THE SECOND AIRCRAFT WE HAVE HAD IN THE PAST WEEK TO HAVE THIS PROBLEM. SAME MODEL AND ONLY 19 SERIAL NUMBERS APART.