As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPLACED LT MUFFLER ON AIRCRAFT DO TO THE DETERIORATED CONDITION OF THE SPARK ARRESTER INSIDE OF THE MUFFLER. LT SIDE SPARK ARRESTER MELTED AND FOLDED OVER. LT MUFFLER, PN 14836001. THE FIRST DETECT REPORT WAS FILED WHEN AC HAD A TT 682 HRS. BOTH LT AND RT SPARK ARRESTERS HAD FOLDED OVER AGAIN. THATS 413 HRS SINCE LAST TIME. RECOMMEND MANDITORY REPLACEMENT AT A SPECIFIED TIME OR REDESIGN OF ARRESTERS. (K)