As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 AND 2 ENGINE AFT SIDE OF FIREWALL LOWER DOUBLERS FOUND CRACKED NEAR OUTER EDGE OF BOTH LEFT AND RIGHT LOWER MOUNT FITTINGS. REPAIRED BOTH LT AND RT CRACKED DOUBLERS ON BOTH ENGINE FIREWALLS BY INSERTION OF NEW DOUBLER SECTIONS OF SIMILAR THICKNESS AND SIZE, USING MONEL RIVETS OF SIMILAR SIZE AT ALL 4 LOCATIONS, IAW CASA TECHNICAL INSTRUCTION TI212-0058 REV 00.