What was found
ELT BATTERY, ARTEX PN 00-25-004, RUPTURED CAUSING SEVERE CORROSION TO RADIO AND CASE. RADIO WAS DAMAGED BEYOND REPAIR. THIS IS THE THIRD OCCURRENCE OF THIS PROBLEM WITH ARTEX BRAND BATTERIES, (2 IN MARTECH ELT'S AND 1 IN NARCO ELT-10). IN THE NARCO INSTALLATION, SUBSTANTIAL CORROSION DAMAGE TO A/C SKIN BELOW ELT OCCURRED. SUBMITTER RECOMMENDS EVALUATION OF ARTEX QC STANDARDS AND PROCEDURES BE MADE. TIS OF AFFECTED BATTERIES WAS LESS THAN THE REPLACEMENT DATE.