What was found
(CAN) DURING A ROUTINE WHEEL CHANGE, IT WAS FOUND THAT 2 OF THE 3 BRAKE RETAINING BOLT HEADS HAD SHEARED. THE BROKEN BOLT HEADS HAD BECOME TRAPPED BETWEEN THE BRAKE AND WHEEL INNER HALF CAUSING SCORING DAMAGE TO THE WHEEL. IT IS SUSPECTED THAT THE COUNTERSUNK WASHERS MAY NOT HAVE BEEN INSTALLED CORRECTLY OR NOT INSTALLED AT ALL UNDER THE BOLT HEAD DURING INSTALLATION OF THE BRAKE. THIS POSSIBLY CAUSING OVERSTRESSING OF THE BOLT WHEN TORQUED. THIS IS DIFFICULT TO PROVE DUE TO LOSS OF THE WASHERS. THE BRAKE WAS INSTALLED IN JUNE 2005. THE BRAKE CHANGE TASK CARD DOES CONTAIN A WARNING NOTE REGARDING THE CORRECT INSTALLATION OF THE WASHERS.