No, not Australia's worst by a long chalk. Lockhart River in 2005 , the toll was 15.
14 Jun 43 Bakers Creek near Mackay, QLD. USAAF B-17 Flying Fortress #40-2072, "Miss Every Morning Fix'n", 40 killed
19 Dec 43 30 miles north of Rockhampton near Rossmoya Rd, Canal Creek area USAAF C-47 Dakota VH-CHR, #43-30742?, 31 killed
10 Jun 60 Into the sea near Mackay, QLD. Trans Australian Airlines F-27 Fokker Friendship VH-TFB, "Abel Tasman", 29 killed
26 Jun 50 York, WA. Australian National Airways Pty Ltd Douglas DC-4 VH-ANA (c/n 42910), "Amana", crashed at night half an hour after takeoff from Perth for Adelaide. 28 killed in crash, 1 other died 2 days later. Total 29 killed.
7 Aug 43 Into Cleveland Bay, Townsville, QLD. USAAF C-47 Dakota #41-7733, 27 killed
31 Dec 68 near Port Hedland: Robertson-Miller Airlines Vickers Viscount 720 VH-RMQ. In-flight separation of the right wing. 26 killed.
10 Mar 46 Frederick Henry Bay, Tasmania. Australian National Airways. Douglas DC-3 (C-47-DL) VH-AET (c/n 6013), Crashed minutes after takeoff from Cambridge, (Hobart) at 8.55 pm. May have been caused by pilot engaging autopilot in mistake for fuel crossfeed. Captain (Spence) diabetic, undisclosed. 25 killed
22 Sep 66 On Nadjayamba Station approx.12 miles west of Winton, QLD. Ansett/ANA Vickers 832 Viscount VH-RMI. Fire in No.2 cabin air Rootes blower. Spread to a fuel tank where upper boom of main spar was heated until it failed. 24 killed
27 Mar 45 Cooktown - Finschhafen USAAF C-47A-90-DL Dakota #43-16011, c/n 20477, 24 killed
27 Mar 43 near Archerfield, Brisbane RAAF C-47 Dakota VH-CTB, A65-2 (A30-16), 23 killed