What was found
BLADE CUFF MISSING FROM BLADE ON NR 1 PROP. ACFT PARTS WERE FOUND ON RUNWAY. IT WAS DETERMINED THE PART SEPARATED DURING THE TAKEOFF ON FLT-8562. THE ACFT WAS TAKEN OUT OF SERVICE FOR REPAIR. INVESTIGATION REVEALED THE PART MAY HAVE BEEN DAMAGED FROM TOOL USED TO REMOVE THE SPINNER DURING A PROP BALANCE SESSION UNDER WO-273210. THE TOOL WAS LOCATED AND A TEST CONDUCTED TO DETERMINE IF THE TOOL (HOMEMADE) COULD HAVE CAUSED THE DAMAGE. THIS WAS CONFIRMED AND THE TOOL WAS REMOVED FROM SERVICE. A NEW BLADE CUFF WAS REINSTALLED. ACFT RETURNED TO SERVICE.