What was found
(CAN) ACFT PARKED ON APRON, HAD A UNCOMMANDED ACTIVATION OF THE ELT SYSTEM. MAINTENANCE WAS NOTIFIED BY THE RESCUE CORDINATION CENTER. INVESTIGATION REVEALED THAT NO DAMAGE HAD OCCURED AND THE NO SWITCHES HAD BEEN TURNED ON. ELT APPEARED TO ACTIVATE ON IT`S OWN. UNIT REMOVED FROM SERVICE AND BATTERY DISCONNECTED. ELT SENT TO AVIONICS SHOP FOR INVESTIGATION.