As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEATER (PN 96C62, SN 9660906) RECEIVED FOR OVERHAUL. HEATER WAS PREVIOUSLY OVERHAULED AND HAS A REPAIR STATION DATA PLATE. UPON INSPECTION, HEATER HAS WRONG COMBUSTION TUBE INSTALLED. WRONG COMBUSTION TUBE REQUIRED COMBUSTION HEAD THAT IS NOT CALLED FOR IN THE 96C62 PARTS LIST. HEATER HAS FAA/PMA (PLASTIC) DIFFERENTIAL AIR PRESSURE SWITCH THAT WAS FOUND BROKEN WHEN RECEIVED. HEATER FAILED PRESSURE DECAY TEST REQUIRED BY AD 2004-21-05.