From the Maitland Mercury report:
On Saturday, a historic diesel will depart Maitland at 9am for a trip to Gosford where riders will be able to enjoy a day out on the waterfront, before returning at 4.20pm.
The following day travelers will have the opportunity to enjoy a special side by side run with Steam Locomotive 5917 as they ride in a streamliner diesel train from Maitland to Waratah. The train will depart Maitland at 9.10am, returning at 12.05pm.
Full article available at Maitland Mercury, 31 Aug 2017.