I finally got around to reading through the weekend timetable that applies in Sydney from Sunday 21 May. Basically, it’s unchanged.
The Airport line is served by a new service which runs from Turrella at intervals of 11/19 minutes. Half the trains terminate at Central platform 21 and half continue around the City Circle, then express to Ashfield.
The trains are all tabled to use five six-car sets, with a little humour added by the choice of Run numbers 707, 717, 727, 737, 738, 747, 757, 767, 777, 787 and 797.
A typical hour looks like this …
| 
             787T  | 
        
             727V  | 
        
             707V  | 
        
             747V  | ||||
| 
             Turrella  | 
        
             dep.  | 
        
             12:07  | 
        
             12:18  | 
        
             12:37  | 
        
             12:48  | ||
| 
             Central  | 
        
             arr.  | 
        
             12:23  | 
        
             12:34  | 
        
             12:53  | 
        
             13:04  | ||
| 
             dep.  | 
        
             12:25  | 
        
             -----  | 
        
             12:55  | 
        
             -----  | |||
| 
             787U  | 
        
             707W  | 
        ||||||
| 
             Circular Quay  | 
        
             ….  | 
        
             12:32  | 
        
             forms  | 
        
             13:02  | 
        
             forms  | ||
| 
             Central  | 
        
             arr.  | 
        
             12:39  | 
        
             12:45  | 
        
             13:09  | 
        
             13:15  | ||
| 
             dep.  | 
        
             12:40  | 
        
             13:10  | 
        |||||
| 
             Ashfield  | 
        
             arr.  | 
        
             12:52  | 
        
             13:22  | 
        ||||
| 
             787V  | 
        
             707X  | 
        ||||||
| 
             Ashfield  | 
        
             dep.  | 
        
             12:59  | 
        
             13:29  | 
        ||||
| 
             Central  | 
        
             arr.  | 
        
             13:10  | 
        
             13:40  | 
        ||||
| 
             dep.  | 
        
             13:11  | 
        
             13:41  | 
        |||||
| 
             747W  | 
        
             787W  | 
        
             767Y  | 
        
             707Y  | 
        ||||
| 
             Circular Quay  | 
        
             ….  | 
        
             13:18  | 
        
             13:48  | 
        ||||
| 
             Central  | 
        
             arr.  | 
        
             13:25  | 
        
             13:55  | 
        ||||
| 
             dep.  | 
        
             13:15  | 
        
             13:26  | 
        
             13:45  | 
        
             13:56  | 
        |||
| 
             Turrella  | 
        
             arr.  | 
        
             13:33  | 
        
             13:43  | 
        
             14:03  | 
        
             14:13  | 
        ||
| 
             forms  | 
        
             13:37  | 
        
             13:48  | 
        
             14:07  | 
        
             14:16  | 
        |||
| 
             Run 777A  | 
        
             Run 717A  | 
        
BTW, is this the first regular service to Mascot using a 757?
Rgds