This week Thai announced that their A350 services to Melbourne were going to be delayed by a few weeks. They were supposed to start on the 16th however they are now scheduled to start on the 24th. This is Thai’s latest schedule update.
Per airlineroute.net:
From 16SEP16 to 23SEP16, Thai will operate Boeing 777-300ER (773) on TG465/466 service, instead of A350. The A350 will continue to operate Bangkok – Chiang Mai and Bangkok – Phuket route during this period.
TG465 BKK0015 – 1205MEL 773 D
TG461 BKK0810 – 2000MEL 777 D
TG466 MEL1515 – 2145BKK 773 D
TG462 MEL2330 – 0600+1BKK 777 D