Australia

The seaplane, carrying 10 crew and 9 passengers, crashed when landing after returning from Merauke and Karumba. After touching down the aircraft traveled a short distance when it struck a large wave and sank by the bow. A film that captured the incident disclosed that after the aircraft sank by the bow one or both anti-submarine depth charges exploded.
Crew (11th Squadron):
F/Lt Charles John Miles, pilot, †
F/Lt William John Canterbury, pilot, †
F/O Ronald Irvine Ferguson, pilot, †
F/O Gordon John Robert Hockey, navigator, †
F/O Reginald Albert Weeks, wireless operator, †
F/Sgt Bernard Victor McInerney, wireless operator, †
Cpl William Richard George Lobb, fitter,
Sgt Maxwell Burnett Dore, flight engineer,
Cpl Ronald Colin Smith, fitter,
Cpl Albert Leslie Fowler, armourer.
Passengers:
S/L Leo Mathew Hogan, †
F/O Charles Harry Ratcliffe, †
S/L John Vernon Angus, †
F/Lt Frank Haighton Lord, †
F/Lt William Archie Wilkinson, †
P/O Beresford Frederick Shearman, †
Cdr Arthur Henry Cobby,
W/Cdr Bruce Panton MacFarlan,
W/Cdr Willem Lodewyk Boscchart Stephens.
Source:
http://www.adf-gallery.com.au/
http://www.ozatwar.com/ozcrashes/qld190.htm

Crashed on landing in unknown circumstances, killing four crew members.
Crew (90th BG):
William A. Miller ?.

The seaplane took off from Bowen on an air to sea gunnery training exercise. At the conclusion of firing practice, the aircraft was making a run across the wave tops over a choppy sea and it is assumed that the port wing hit the water and the aircraft crashed into the sea and sank approximately 5 miles east of Bowen. Two crew members survived while 14 other occupants were killed.
Crew (20th Squadron):
F/O Peter Keene, pilot, †
F/O Stanley John Porteous, copilot, †
Sgt Robin Fowler, flight engineer,
Sgt Raymond Charles Ciglander, navigator, †
Sgt Harold Stuart William Thomas, wireless operator and air gunner, †
Sgt Leslie George Dalgleish, fitter, †
LAC Ainslie Ivor Dent, fitter, †
AC1 Cyril Leslie Edwards, armourer.
Passengers:
Sgt Lloyd George Fiske,
S/Sgt Leslie Harry Harrison,
Sgt Robert Ronald Harrison,
Pvt Douglas McLaine,
Pvt Irvine George Osborne,
Cpt Lawrence Edward Tansey,
Pvt Kenneth Reginald Walker,
Cpt Donald Charles Whitfeld.
Source: http://www.adf-gallery.com.au/

On touchdown at Wynyard Airport, the aircraft went out of control, veered off runway and collided with a ditch before coming to rest. While all four occupants were uninjured, the aircraft was damaged beyond repair.
Crew:
Cpt F. H. Dawson.

The aircraft christened 'Eagle Beaver' left Townsville-Garbutt Airport at 0500 bound for Brisbane-Archerfield. Twenty minutes later, while climbing by night, the aircraft went out of control and crashed into the Cleveland Bay, few miles off shore. No survivor was found among the 27 occupants.
Crew (40th TCS):
M/Sgt Donald H. Arbogast,
S/Sgt Delbert Braund,
T/Sgt Leo W. Butcher,
T/Sgt Grant W. Caldwell,
S/Sgt Cielinski,
T/Sgt Andrew J. Crowley Jr.,
Sgt Herman R. Cummins,
T/Sgt Rodney D. Dinneen,
M/Sgt Aram L. Doolittle,
T/Sgt Stephen D. Dzury,
F/O Forrest,
S/Sgt Wilmer Roland Fowler,
1st Lt Owen A. Hawver,
T/Sgt Carl J. Huebner,
T/Sgt Charles S. Hunter,
M/Sgt Francis M. Lee,
Cpl Markel,
T/Sgt Laurence P. McKenna,
T/Sgt Ezra E. Rapp,
S/Sgt William Fred Repass,
T/Sgt George A. Roberts,
Sgt Floyd M. Simpson,
Cpl Venard H. Trebon,
S/Sgt Charles W. Tuttle,
S/Sgt Willard G. Van Patten,
F/O H. Wilson,
S/Sgt Charles J. Zahora.

While completing a training sortie, the pilot became lost. Due to fuel exhaustion, he was forced to attempt an emergency landing on a beach located in Coffs Harbour. While all four crew members were rescued, the aircraft was lost. The accident occurred after a flight of almost 6 ½ hours, two hours beyond the accepted endurance.
Crew:
F/O James M. Swann, pilot,
A. H. Morton, wireless operator and air gunner 2.

The aircraft took off at 1944LT to carry out practice DR9. This practice was a night flight from Base-Flinders-Currie-Hogan Group-Base. The aircraft was on wireless silence and failed to return. The maximum endurance of the aircraft was 7 hours. The aircraft failed to return and all searches have proved negative.
Crew:
P/O John James Bowman, pilot,
P/O Alan Joseph Malone, navigator,
P/O Harry Robert Alfred Guymer, wireless operator and air gunner,
P/O Alexander Frederick McDonald, wireless operator and air gunner,
P/O John Alexander Buchanan, air gunner.
Source: http://www.adf-gallery.com.au/

Crashed in unknown circumstances into the Exmouth Gulf, killing four crew members and injuring four others.

The airplane departed Mackay to Port Moresby with a crew of six and 35 US soldiers on board, following a permission period. Shortly after takeoff, the captain decided to make a low pass over the airport so the people on ground could take all's leave off. During the last turn, the airplane named 'Miss Every Morning Fixin' went out of control, stalled and crashed in a huge explosion about one km from the runway threshold. A passenger was seriously injured while 40 other occupants were killed. Up to date, worst plane crash in Australia.
Crew (19th BG):
1st Lt Vern J. Gidcumb Jr., pilot,
F/O William C. Erb, copilot,
2nd Lt Jack A. Ogren, navigator,
Sgt David E. Tileston, radio operator,
S/Sgt Lovell Dale Curtis, crew chief,
S/Sgt Frank E. Whelchel, crew chief.
Passengers:
Pfc Jerome Abraham,
Cpt John O. Berthold,
T/5 William A. Briggs,
Sgt Dan H. Busse,
T/Sgt James A. Copeland,
Sgt Carl A. Cunningham,
T/5 George A. Ehrman,
Pvt James E. Finney,
Sgt Leo E. Fletcher,
T/Sgt Alfred H. Frezza,
Pfc Norman J. Goetz,
S/Sgt Roy A. Hatlen,
S/Sgt John W. Hilsheimer,
Pfc Vernon Johnson,
Sgt Donald B. Kyper,
Sgt Charlie O. LaRue,
Pvt Raymond D. Longabaugh,
Pfc Kenneth W. Mann,
Cpl Marlin D. Metzger,
Pvt Charles D. Montgomery,
Pfc John W. Parker,
Pfc Frank S. Penska,
Maj George N. Powell,
Sgt Anthony Rudnick,
Cpl Charles W. Sampson,
Pfc Arnold Seidel,
Cpl Jacob O. Skaggs Jr.,
Cpl Franklin F. Smith,
Cpl Raymond H. Smith,
Pfc Frederick C. Sweet,
Cpl Edward Tenny,
Pfc Dale Van Fosson,
Pvt Ruben L. Vaugh,
Charles M. Williams.
Sources & photos: http://www.ozatwar.com/ozcrashes/qld46.htm

The aircraft was at 500 feet with gear extended over the threshold of strip with the port airscrew feathered due to engine problems. The pilot raised the undercarriage and applied power to starboard engine, but the aircraft pulled to port and begun to loose height and crashed one mile north east of Hughes Strip. The aircraft was destroyed in the impact and ensuing fire.
Crew (2nd Squadron):
F/Lt J. F. Mason,
F/Lt J. R. Wood,
F/O T. W. Swann,
F/Sgt R. J. Flaherty,
F/Sgt R. D. Woods,
Sgt G. R. Rowland,
F/O G. L. Knauer.
Source: http://www.adf-gallery.com.au/