As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MECHANIC FOUND SIGNS OF LEAKAGE AND CORROSION BEHIND LOWER AFT PASSENGER SEAT BULKHEAD, SEAT FRAME AREA, BATTERY SHELF, BAGGAGE COMPARTMENT FLOOR. THE AIRCRAFT BATTERY IS MOUNTED ON ITS SIDE CAUSING THE ACID TO LEAK FROM SEALED BATTERY SERVICE PORTS.