Brake Van Reclassification
The code of all brake vans was changed to conform to the Railways of Australia organisations new classification scheme in 1982. This resulted in HRD classification becoming AVDY, HRE became AVEY etc.
In late 1987 the bogie type changed from "Y" to "P" to allow for a change to the maximum speed limit to 115km/h for most brake vans. Thus the last letter of most brake van classifications was change e.g. AVDY became AVDP.