As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN UNIT WAS RETURNED TO DORNE AND MARGOLIN FOR REPAIR DUE TO NO OUTPUT, IT WAS FOUND THAT THE ARTEX BATTERY INSTALLED IN THE UNIT WAS ONLY APPROVED TO TSO C91. SUBMITTER STATED THIS BATTERY PACK DOES NOT FIT PROPERLY IN THE D & M ELT 14-1-1 AND THIS MAY HAVE CAUSED THE FAILURE IN THIS UNIT AS THE WIRE FOR THE BATTERY WAS DAMAGED CAUSING THE FAILURE.