As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL NOZZLE FRACTURED DUE TO INCORRECT PART FITTED. THIS CAUSED DIRECT FLAME TO CONTACT THE BASE OF THE FUEL NOZZLE AND THE DIFFUSER CASING. THE DIFFUSER CASING WAS STARTING TO DEFORM AND OXIDIZE. POTENTIAL FOR SERIOUS CASE BURN-THROUGH AND DUCT FIRE. CUSTOMER AND FUEL NOZZLE REPAIR STATION HAVE BEEN NOTIFED.