Papua New Guinea

One minute after takeoff from Alotau Airport, while climbing, the captain informed ground he was encountering bad weather conditions and elected to return. Shortly later, the aircraft went out of control and apparently crashed into the sea off Alotau. Some debris were found a day later but no trace of the 19 occupants. At the time of the accident, weather conditions were unfavorable with turbulence and rain due to the presence of a tropical storm.
Crew (33rd Squadron):
F/Lt Eric Clarence Beer, pilot,
F/Lt John Francis Mulcahy,
F/Sgt Francis Xavier Sullivan.
Passengers:
Sgt Keith Hugh Devenish,
AC1 Albert John Haslam,
Cpl Neil Stuart Mackay,
LAC William Douglas Goldie Stevens,
Cpl Michael Francis Moran,
Sgt Wesley Greg Doran,
F/O William Patrick Reedman,
F/Sgt James Neville Davis,
F/Sgt Kevin Francis Rutherford,
F/Lt William John Gordon,
Cpl Eastall Lochlan Eastall,
LAC Albert Grant Walton,
LAC Percy Badon Healy,
Cook Gordon Liddell,
Lt Noel Thomas Williams,
Spr Keith Smith.

While returning to his base and completing a turn at a height of 75 feet, the crew lost control of the aircraft that crashed inverted in the Seeadler Harbour. All six crew members were killed.
Crew (4th Squadron):
F/Sgt Jack Mummery,
F/Sgt Joseph Hartley,
F/Sgt Arthur Doreen,
F/Sgt Richard Anderson,
F/Sgt Kenneth Taylor,
Cpl James Gibson.

Crashed in unknown circumstances near the Samarai Island while performing a cargo flight from Sydney to Momote. All three crew members were killed.
Crew:
F/Lt Charles Raymond Kerferd Young, pilot,
F/O Frederick Dunlop Rutledge, navigator,
W/O Kenneth Clement Bevan, radio operator.

Just after liftoff, in initial climb, the twin engine aircraft banked left, hit the ground and crashed in flames. All four crew members were killed.
Crew (21st Squadron):
W/Cdr Andrew Henderson,
F/Lt Alexander Baxter,
F/Lt Arthur Lambie,
F/Sgt William Torkington.

The seaplane left Mokerang Airfield at 0330LT to test the distance measuring equipment for COMAIR Admiralties. As the aircraft failed to return, SAR operations were conducted but were eventually suspended few days later as no trace of the aircraft nor the 12 occupants was found.
Crew (1551st AAFBU):
1st Lt Paul W. Drew, pilot,
Cpl Earnest John Bauer, flight engineer,
Sgt Ralph Elliott Beirdneau, radio operator,
Cpl Harry D. Paige Jr., radio operator.
Passengers:
1st Lt Paul C. Crouch,
1st Lt Gordon A. Johnson,
2nd Lt Robert L. Flicker,
2nd Lt Milton M. Tittler,
2nd Lt Ralph J. Greco,
S/Sgt Robert P. Eisele,
Sgt Clyde Allen Walker,
Cpl Carl A. Spangler.

The crew left Emirau Airport on a bombing mission to Rabaul. Following a uneventful mission and while returning to its base, the twin engine aircraft crashed in the Lelet Plateau. The wreckage was found in November 1945 only. All six crew members have been killed.
Crew (8th Squadron):
F/O Norman Benton,
F/Sgt James Cunneen,
F/Sgt Robert Buchanan,
W/O Chris Jeffares,
F/Sgt James Mallett,
Sgt Norman Merfield.

Lost without trace on a flight from Momote to Biak.

Crashed for unknown reason off Momote Airport, into the Bismarck Sea. All four crew members were killed.

The aircraft left Aitape-Tadji Airport at 0635LT on a supply mission to Maprik. Enroute, while cruising in poor weather conditions, the aircraft hit the slope of a mountain near Housecap. The wreckage was spotted by the pilot of a Beaufort the same day at 1330LT. All seven occupants were killed.
Crew (38th Squadron):
F/Lt S. C. Akers,
F/Sgt J. W. Lawson,
Sgt W. J. McInroy.
Source: http://www.adf-gallery.com.au/

The aircraft departed Lorengau Airport by night bound for Biak-Sorido. During the initial climb, the four engine aircraft crashed on a wooded hill located near the airfield and was destroyed by impact forces and a post crash fire. All 21 occupants were killed.
Crew:
1st Lt Rex S. Brown,
Cwo Russell T. Crawford,
Cpt William V. Mudra,
2nd Lt Paul L. Reinhold,
Cpt Frank E. Stewart,
1st Lt Delmar E. Wortman.