As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ANNUAL PERFORMANCE TEST, IT WAS NOTICED THAT DURACELL MN1300 BATTERIES DATED MAR 2010 WERE LEAKING WHAT APPEARED TO BE BATTERY ACID. BATTERY VOLTAGE WAS LOW. ELT BATTERY CASE WAS CLEANED AND A FULL SET OF NEW BATTERIES WERE INSTALLED. ELT WAS PERFORMANCE TESTED AS PER CAR 571 APPENDIX G AND FOUND TO BE OK.