As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 100-HOUR INSPECTION, FOUND FIREWALL CRACKED AT LEFT LOWER COWLING SHOCK MOUNT BRACKET ADJACENT TO BATTERY BOX. CRACKS EXTENDED VERTICALLY FROM BRACKET ATTACH RIVET HOLES AND TOTALLED APPROXIMATELY 2.3750 INCHES IN LENGTH. DOUBLER PATCH WAS INSTALLED ON INSIDE OF FIREWALL.