Thanks for your assistance der8110, I am investigating that.
The AC and TSO are also very useful (although I am not sure if the existing disc meets the TSO) - thanks aeroz.
I am trying to put together a data package for a PMA for a client, who wishes to manufacture brake discs for a light commuter aircraft.
The Original Equipment Manufacturer stopped making the discs quite a few years ago, and consequently they are not interested in providing any support.
I am...