As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ANNUAL, FOUND CORROSION IN ELT CAUSED BY BATTERY LEAKING, SWELLING, AND CRACKING THE BATTERY ENCLOSURE. THIS IS SECOND CONSECUTIVE ANNUAL WITH SAME PROBLEM. MARTECH ENGINEER SAID HIGH CABIN TEMPS CAUSING PROBLEM AND ADVISED ELT'S BE REMOVED FROM ACFT WHEN NOT IN USE AND BE STORED IN COOL TEMPS. CLEANED UP ELT AND INSTALLED ANOTHER NEW BATTERY PACK.