PAC = Partial Air Con
FAC = Fully Air Con
OAC RCN's , the Original Air Con UD's , those TIB3xx ,
CSS178-187
SCN CAC's , the Converted Air Con UD's (not the current ones ,
which is actually RCN's) , no longer around now
WA DAF , the Alexander Setanta DAF , the one u see on Services like
172 , 985 , 975 etc
Hispano DAF no longer around but is now in NZ