Training

While performing a training flight, the aircraft collided with a RAF Anson registered DJ239 and carrying a crew of five as well. The collision occurred in unknown circumstances east of Maryport and both aircraft crashed in a field, killing all ten crew members on both aircraft.
Crew:
Sgt Charles S. Anderton, pilot,
F/O Edwin Creed,
LAC Harry Hudson, wireless operator and air gunner,
F/O Lyn Rees,
LAC Fred Wilson, wireless operator and air gunner.

Crashed in unknown circumstances near Sarasota-Bradenton Airport. All five crew members were killed.

While performing a training flight, the twin engine aircraft collided with a RAF Vickers 271 Wellington registered HZ637 and carrying a crew of five as well. The collision occurred in unknown circumstances east of Maryport and both aircraft crashed in a field, killing all ten crew members on both aircraft.
Crew (10th AFU):
P/O Alexander Iver MacRae, pilot,
Sgt Geoffrey Basil Temple Wymer, navigator,
F/Sgt Michael Henry Cornell, navigator,
Sgt Thomas Green, wireless operator and air gunner,
Sgt John Thomas Sutherland, air gunner.

Shortly after take off, while in initial climb, the aircraft was caught by strong cross winds, nosed down and crashed in a field. Both pilots were injured.

The crew left Hamilton AFB in the morning on a routine training sortie. En route, the pilot informed ground about his position and a little later, the aircraft hit tree tops and crashed on a hilly terrain located ten miles northeast of Covelo. All six crew members were killed.
Photos on http://www.aviationarchaeology.com/b17tday.htm

The crew consisted of three members of the Soviet Air Force and a Czech interpreter. En route, the aircraft went out of control, dove into the ground and crashed north of Fearnan. All four occupants were killed.
Crew (305th FTU):
Maj Aleksandr Gruzdin, pilot,
S/Lt Aleksandr Andrejevich Aleksejev, flight engineer,
S/Lt William Dramin.
Passenger:
Sgt Francis Drahovzal.

During a training sortie, while cruising off Millom, the twin engine aircraft crashed into the sea in unknown circumstances, killing both crew members.

On final approach to RAF Hooton Park, while performing a training mission, the captain decided to make a go around. While climbing, the aircraft stalled, dove into the ground and crashed in a field. All four crew members were critically injured. Few hours later, two of them died from their injuries.
Crew (11th RS):
F/Sgt Russell Charles Denny, †
Sgt J. T. R. Bazire, †
Sgt Austin,
Sgt F. J. Spillane.

On final approach to RAF Silloth, at a height of less than 10 feet, the aircraft stalled and hit the runway surface. While the aircraft was damaged beyond repair, both pilots were unhurt.

The crew was performing a training sortie from RAF Jurby, Isle of Man. En route, the twin engine hit telegraph wires and flew into the ground some one mile north of Tadcaster. All five crewmen were killed.
Crew (5th AOS):
P/O Harry Rhodes, pilot,
Sgt George Ervin Bleier, observer and navigator,
LAC Peter Geoffrey Wilson, observer and navigator,
Sgt Percy Annetts, wireless operator and air gunner,
Sgt Gerald Henry Charles Watkins, wireless operator and air gunner.