As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE AIRCRAFT WAS BEING PUSHED BACK USING A TOWING DEVICE PART OF THE BRAKE ROTORS CAME LOOSE ON THE RT MLG AND PUNCTURED THE RIM ASSEMBLY. CAUSED THE TIRE TO GO FLAT. BRAKE DISC AND WHEEL. REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE. WAS INFORMED BY THE LOCAL DEALER THAT THE ROTORS USED IN THIS BRAKE DISC WERE SUPPOSED TO BE NEW AND IMPROVED JUST FOR THIS SITUATION. (TC NR 20070720006)