Southern and Eastern Region service problems concerning T.B.L. 802 composition brakeblocks (TM-MS-015)

In July 1974 six pairs of TBL 802 brake blocks were received from the Eastern Region (Experiment No. EH/265). The blocks were in three batches of four, and had been in service over three periods from September 1973 to May 1974. The Materials Science Section was asked to determine whether...