What was found
(CAN) WHILE APPLYING TORQUE TO THE PROP MTG BOLT NUTS, AFTER REPLACEMENT OF THIS PROPELLER ASSEMBLY, ONE OF THE BOLTS SHEARED OFF.NORMAL TORQUE WAS BEING APPLIED AS PER THE AMM. THE TORQUE WRENCH WAS SENT OUT FOR CALIBRATION TEST, NO PROBLEMS WERE FOUND. PROP HUB & ALL MTG BOLTS REPLACED, RETURNED TO HAMILTON STANDARD. NEW PROP & MTG BOLTS FITTED. A/C RETURNED TO SERVICE, POST GROUND RUNS AND ALL CHECKS CARRIED OUT SATISFACTORY.