As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATTERIES LEAKED INSIDE ELT UNIT PREVENTING ELT OPERATION AND DESTROYING CONTACTS INSIDE UNIT. THIS IS ONE OF SEVERAL TIMES THIS PROBLEM HAS BEEN SEEN IN THE NEWER OR MORE RECENTLY MANUFACTURED BATTERIES THIS PARTICULAR SET HAD AN EXPIRATION OF 2012 AND HAD ONLY BEEN INSTALLED IN THE UNIT FOR ONE YEAR. RECOMMEND BAT REPLACEMENT EVERY 6 MONTHS UNTIL THIS PROBLEM IS ADDRESSED BY ELT MANUFACTURES OR THE BATTERY COMPANY NOTE OLDER BATTERIES DID NOT EXHIBIT THIS PROBLEM.