As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INVESTIGATION FOR BURNED WIRING IN AREA OF EXHAUST CROSSOVER PIPE, FOUND WORM GEAR TYPE CLAMPS ON SHROUD BROKEN. SHROUD WORKS FREE AND CHAFES HOLE IN CROSSOVER PIPE. HOT GASES THEN BURN WIRING. SUBMITTER REPORTS SEEING 4 ACFT WITH THIS CONDITION.