Remember folks, it's not just age, it's utilization. As an example, while the AM-2 may be newer than AM-1 the AM-2 have racked up the miles.
+ on average the AM-2s have traveled on worse tracks.Remember folks, it's not just age, it's utilization. As an example, while the AM-2 may be newer than AM-1 the AM-2 have racked up the miles.