All World

Crashed into the Atlantic Ocean in unknown circumstances. All seven crew members were killed.

While overflying the North Sea, the bomber was shot down by the pilot of a German fighter and crashed into the sea some 112 km of the Norwegian coast. All nine crew members (Czech citizens) were killed.
Crew:
P/O Jaroslav Hara,
W/O Štefan Jaros,
F/Sgt Karel Katz,
F/O Frantisek Koranda,
F/Sgt Michal Kubina,
F/Sgt Jozef Remenár,
Sgt Bedrich Sklár,
F/Sgt Alois Stocek,
F/Sgt Frantisek Veitl.

The C-47 took off at 1240LT on a glider tow mission towing a Waco CG-4A. The objective was to tow the glider to Landing Zone W, located north of Eindhoven, the Netherlands. Over Breda at 1600LT the flight ran into an intense concentration of light flak and the left engine was hit and began trailing smoke. The pilot continued to the LZ and released the glider at 1615LT. While returning to the U.K., about 22 miles from the Dutch coast the left engine went out. The left prop was feathered, but it immediately unfeathered. By this time the aircraft was filling up with smoke and the radio operator caught sight of flames under the floor. The pilot nosed the plane down at 220 mph indicated airspeed from 4,000 feet indicated altitude, turned into the wind and started to level at 1,000 feet. The plane was brought in a tail low attitude and was ditched at 1652LT. The crew escaped and deployed a dinghy from which they were rescued after about 15 minutes.
Source:
http://aviation-safety.net/database/record.php?id=19440918-22

Lost without trace in the North Sea while performing a flight from Brussels to RAF Down Ampney.

En route, an engine suffered technical problems and the captain elected to ditch the aircraft. In unknown circumstances, the seaplane went out of control and crashed into the sea some 1,500 km east of the Marshall Islands. All four crew members were killed.

The crew left Gibraltar bound for RAF Newquay-St Mawgan, Cornwall. En route, the aircraft encountered poor weather conditions and likely crashed into the Atlantic Ocean. No trace of the aircraft nor the eight occupants was ever found.

The twin engine aircraft left Nausori Airport at 0600LT with five other similar aircraft bound for Whenuapai, in New Zealand. En route, the weather conditions worsened and while in a thick cloud layer, the aircraft went out of control and crashed into the sea. SAR operations were conducted for almost a week but no trace of the aircraft nor the seven crew members was ever found.
Crew (4th Squadron):
F/O Norman Beard,
W/O Arthur Dunstan,
Sgt Thomas Carey,
Sgt Robert Gillespie,
P/O Ivan Johnson,
F/Sgt Thomas Ward,
F/O John Waugh.

The twin engine aircraft left Nausori Airport at 0600LT with five other similar aircraft bound for Whenuapai, in New Zealand. En route, the weather conditions worsened and while in a thick cloud layer, the aircraft went out of control and crashed into the sea. SAR operations were conducted for almost a week but no trace of the aircraft nor the seven crew members was ever found.
Crew (4th Squadron):
F/Lt Wilbur Lange,
Sgt George Bryant,
P/O Kenneth Ross,
F/O Sydney Aldridge,
P/O Kenneth Marshall,
F/O Jack Olson,
F/O David Stewart.

En route, a dual engine failure forced the crew to ditch the aircraft into the Atlantic Ocean, some 320 km off Natal. The aircraft was lost but the crew fate remains unknown. The crew was on his way to deliver the aircraft.

The crew was engaged in a maritime patrol flight in the south Pacific Ocean. The aircraft was lost without trace.