What was found
(CAN) RT ENGINE CHIP CAS MESSAGE ILLUMINATED ON TAKEOFF. THE TAKEOFF WAS ABORTED WITHOUT INCIDENT. INVESTIGATION REVEALED THE METAL PICKED UP BY THE CHIP DETECTOR WAS COMING FROM THE FAN GEARBOX ASS'Y. WHILE DISASSEMBLING THE PLANETARY GEAR ONE OF THE GEARSHAFT WAS FOUND SHEARED OFF AS PER REASON IN SERVICE BULLETIN TFE 731-72-5181. THE SERVICE BULLETIN WAS COMPLIED WITH THE INSTALLATION OF A NEW SET OF PLANETARY GEAR P/N 3060129-7. THE ENGINE GROUND RUN AND VIBRATION SURVEY WERE COMPLETED SUCCESSFULLY AND THE AIRCRAFT WAS RETURN TO SERVICE.