Hobay-
The 4 x a week (Tu, Th, Sa, Su) 717 flight comes in from ROK-SYD then does SYD-OOL-SYD. One those days a SYD a/c goes up to ROK (dep SYD 1500). This is to cycle the a/c for maintinence. On Mo We and Fri the a/c goes SYD-TSV-SYD (dep SYD 1445).