As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A PHASE 1 INSPECTION FOUND A CRACK IN THE FIREWALL AT THE LOWER ROW OF RIVETS ATTACHING THE BATTERY BOX TO THE FIREWALL. UPON REMOVAL OF BOX FOR REPAIR FOUND 2ND CRACK UNDER THE OUTBOARD VERTICAL ROW OF RANGE IN MFG SB FIREWALL INSPECTION.