As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND EXHAUST CASE FORWARD FLANGE WARPED CAUSING EXHAUST LEAKAGE AND A FALSE FIRE WARNING. REPLACED EXHAUST CASE WITH OVERHAULED CASE SN GGM1158. TESTED FIRE LOOP SYSTEM IAW MFG MM. GROUND RUN AND LEAK CHECKED EXHAUST CASE. ALL WORK PERFORMED IAW SEI186 AND MFG MM.