What was found
(CAN) M/R BLADE INSPECTED FOR INSTALLATION ONTO A BELL 206B. THE BLADE WAS PURCHASED THRU A BHT APPROVED SUPPLIER IN THE USA, STERLING HELICOPTERS IN A USED SERVICEABLE CONDITION. THE MAIN BLADE HAD BEEN REPAIRED 37 HOURS EARLIER WITH A REPLACEMENT BLADE BOLT BUSHING FROM IAC LTD. AN FAA APPROVED MAIN ROTOR BLADE REPAIR FACILITY. DURING THE INSTALLATION PROCESS OF THE MAIN ROTOR BLADE IT WAS NOTICED THAT THE UPPER 1/3 OF THE BLADE BOLT BUSHING INSTALLED IN THE SUBJECT MAIN ROTOR BLADE WAS ELONGATED BY .003" OUT OF ROUND. THE BLADE WAS REJECTED & SENT TO CTC WINNIPEG FOR INSPECTION & RE-REPLACEMENT OF THE MAIN BLADE BOLT BUSHING. CTC WINNIPEG REMOVED THE BLADE BOLT BUSHING INSTALLED BY IAC & DISCOVERED EXTENSIVE DAMAGE CAUSED BY INCORRECT TECHNIQUES WHEN INSTALLING THE BUSHING 37 HOURS EARLIER. THE MAIN BLADE HAS CRACKED & DEBONDED MAIN STRUCTURAL DOUBLERS THRU THE ENTIRE BLADE ROOT AREA. IT IS LIKELY THE INSTALLED BLADE BOLT BUSHING ELONGATED AS A RESULT OF FALLING MATERIAL THAT WOULD THEN LEAD TO LOSS OF MAIN BLADE & LOSS OF ACFT.