As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A ROUTINE INSPECTION, THE FIREWALL WAS FOUND CRACKED IN 3 PLACES. THE FIREWALL THICKNESS - .016 INCH WHICH IS THINNER THAN OLDER MODELS WHICH ARE BETWEEN .020 INCH AND .024 INCH. (IT IS DIFFICULT FOR AN ACCURATE MEASUREMENT TO BE TAKEN WITHOUT DISASSEMBLING ACFT FIREWALL). THERE IS ALSO NO DOUBLER BEHIND THE COWL MOUNTS TO PREVENT FLEXING OF THE FIREWALL AT THESE POINTS.