For those interested the AN DC9-31's did the following sectors with some difficulty at times.
ADL-PER with 80 pax in the late 1960's when there were only 6 x B727-177's and no B727-277's.
CBR-ADL, LST-OOL, BNE-MEL from Eagle Farm with an ALTN of LST, PHE-DRW when HLDG or ALTN required. On one occasion a DC9 diverted to GOV which was a big deal at the time as it was non controlled with a 30M wide runway.
I remember a ISA-BNE (1981) was a challenge one day with requirements in BNE.
The DC9-31 also operated SYD-NOU-VLI and return for Air Vanuatu. The first service was on 5 SEP 81. The return NOU-SYD was approx. 3.5 hours. If there were any requirements on SYD it was necessary to consider a fuel stop somewhere between ROK and NTL.