Australia

Taking off at night from Truscott airstrip the aircraft became airborne approximately halfway down the strip. It is believed the aircraft became airborne early due to a noticeable hump in the airstrip causing the aircraft to suddenly climb approximately 20 feet. According to the witnesses who were part of a working party directly in front of the aircraft when it became airborne, the aircraft apparently veered left moving rather slowly, gaining little speed or height. The aircraft then rose to about 40 feet and then fell sharply to the ground a short distance away from it's initial point of take off. With fire crews quickly making their way to the scene any hope of finding survivors was lost when a number depth charges the aircraft was carrying exploded.
Crew (12th Squadron):
F/Lt F. L. Sismey, pilot,
F/O W. S. Bell,
W/O T. N. Rust,
W/O B. L. Cox,
F/Sgt L. Duncanson,
F/Sgt L. M. Bailey,
F/Sgt I. N. L. Eadton,
F/Sgt T. W. Allan,
F/Sgt D. D. Benson,
F/Sgt J. A. Hollis,
F/Sgt J. R. W. Herps.
Source: http://www.adf-gallery.com.au/

The descent to Horn Island-Higgins Field was attempted by night and low visibility. On approach, the twin engine aircraft hit tree tops and crashed in a wooded area near the airport, killing all six occupants.
Crew:
F/O William Ernest Clarke, pilot,
W/O James Hillman Hornbrook, copilot,
F/Sgt Neville Tasman Browne, flight engineer,
W/O Alfred Henry Gidley, radio operator.

Left East Sale Airport at 1913LT on a night training mission via Paysnesville and Patts River. While cruising along the shore, the twin engine aircraft crashed into the sea off Ocean Grange. A wheel and an undercarriage were spotted on a beach but no trace of the aircraft nor the five crew members was found.
Crew (1st APU):
W/O F. J. Maughan, pilot,
F/O A. S. Cullen, navigator,
W/O H. L. Hammersley, wireless operator and air gunner,
F/Sgt R. C. Smith, wireless operator and air gunner,
Sgt F. W. Walker, air gunner.

The crew departed Perth Airport runway 11 in foggy conditions. Three minutes after takeoff, while in initial climb, the aircraft did not gain sufficient height, hit a tree and crashed in flames in Gooseberry Hill. The aircraft was destroyed by impact forces and a post crash fire. All 13 occupants were killed.
Crew:
Lt William C. Armstrong, pilot,
Ens Victor F. Padelsky, copilot,
A1c Robert A. Dunleavy,
A2c Stanley A. Gober,
A1c James A. Glenn,
Cdr R. R. Helbert,
Lt Cdr Montrose G. McCormick,
Lt Sidney S. Cook,
Cre Robert V. Daly,
Tec Buships C. L. Nelson,
Anne Woodward,
Geraldine Crow,
Cecil Nichols.

The heavy bomber left Truscott AFB at 0650LT on a bombing mission over Bali and Lombok. Shortly after takeoff, the crew contacted the tower to inform that he encountered problems to gain height. Several distress calls were sent and 23 minutes later, the aircraft crashed into the Vansittart Bay, off Truscott. All 12 crew members were killed and only three bodies were found.
Crew (24th Squadron):
S/L N. H. Straus, pilot,
F/Sgt Boyd, copilot,
F/Sgt R. M. Morris, flight engineer,
F/Lt C. D. Parry-Okenden, navigator,
F/O R. A. Whiting, navigator,
F/O J. W. Hursthouse, wireless operator and air gunner,
W/O W. R. Flanagan, wireless operator and air gunner,
W/O H. G. Parker, air gunner,
F/Sgt J. R. Ryan, air gunner,
F/Sgt A. J. Rogers, air gunner,
Sgt A. D. Whitehead, air gunner,
Cpl D. W. Madden.

The pilot, sole aboard, was performing a flight from Brisbane-Archerfield Airport to Dulacca, Queensland. While approaching Miles, he encountered unspecified problems and was forced to attempt an emergency landing when the single engine airplane hit power cables and crashed in a field. The pilot was injured and the aircraft was written off.

The aircraft left Rockhampton bound for Pitu, Indonesia, with 20 passengers and a crew of two on board. Enroute, the crew decided to return due to insufficient fuel. While approaching Cape Melville, the captain ordered the passengers to bail out. The crew abandoned the aircraft as well and the Dakota crashed into the Bathurst Bay. Five passengers were injured and fifteen others were unhurt. A passenger was killed because his parachute failed to open and no trace of the captain was found.
Crew:
1st Lt Rueben A. Blackburn,
Sgt Henry P. Williams. †
Source: http://www.ozatwar.com/ozcrashes/qld148.htm

Crashed in unknown circumstances in Darwin River, killing all four crew members.
Crew:
S/Sgt Merle L. Bice,
2nd Lt Glen R. Jacobs,
2nd Lt George A. Pfrommer,
Sgt Walter F. Plisga.

The crew was completing a training mission at Bairnsdale Airport. On final approach, the twin engine aircraft crashed 500 yards short of runway threshold. A crew member was killed while three others were injured.
Crew:
Sgt M. Lawrence, †
W/O J. K. Phillips,
F/O W. L. Haynes,
Sgt E. J. Richardson.

Low on fuel while conducting a night training mission in poor weather conditions, the aircraft crashed 2 miles north of Rosedale. A crew members was killed while three others were injured. Sgt. D.J. McLeod parachuted at low altitude and died.
Testimony from the pilot:
The cause of the crash (which the Court of Enquiry called a phenomenon of the weather) was a low cloud bank, right down to the deck, up to about 2000 feet which rolled in from the sea enveloping our base at Bairnsdale, which is near the coast. The 13 aircraft engaged in this night navigation exercise were out at sea. My crash was caused by the lack of fuel. I was the first to take off that night and was about 100 miles from the coast when I sent a signal to base reporting that weather conditions prevented some parts of the navigation procedures being carried out. Base notified all aircraft to return to base. Probably about half of them were able to land at Bairnsdale. After exploring every option available to me the only hope was to bail out because Eastern Victoria was completely covered. So I was about to climb to 5000 feet when we saw a hole in the clouds and a row of lights which could have been a flare path. After checking the fuel and the time we had been in the air I calculated that I still had 30 minutes of fuel which was sufficient to investigate. The lights proved to be a stationary train. I immediately started to climb out when the starboard motor cut at about 2000 feet above sea level. The crew managed to bail out just before the port motor cut. I went into crash landing procedure hitting four trees and losing a large section of one wing and a portion of the other. The aircraft was a write off.
Crew:
F/Sgt Kevin M. Moloney, pilot,
Sgt D. J. McLeod, †
G. S. Liles,
P/O A. M. Ward.
Source: http://www.ozatwar.com/ozcrashes/vic141.htm