What was found
(CAN) PROP BLADE CUFF DAMAGED, LARGE CHUNK FOUND MISSING (8 INCH BY 8 INCH) AND DE-ICE BOOT DE-LAMINATED. ON PREVIOUS FLIGHT PILOT REPORTED - DE-ICE SELECTED ON PROP DE-ICE AMMETER PEGGED FULL DEFLECTION WHEN SAID BLADE SEQUENCED. UPON INSPECTION OF THE AFT SIDE OF THE PROP REGULATOR MAINTENANCE FOUND ADEL CLAMP RUBBER MISSING AND CUTTING INTO BLADE DE-ICE BOOT POWER WIRE, CAUSING MASSIVE SHORT TO GROUND. THIS CAUSED STRUCTURAL FAILURE OF THE CUFF MATERIAL. FLEET CAMPAIGN DIRECTIVE HAS BEEN INITIATED TO INSPECT ALL ADEL CLAMPS FOR INTEGRITY.