Martin B-26 Marauder

Crashed into the Tyrrhenian Sea while performing a maritime patrol flight. No trace of the aircraft nor the six crew members was ever found.
Crew:
F/Sgt T. C. Bullock,
W/O F. L. Trovillo,
P/O J. L. Mouatt,
Sgt C. Warburton,
F/O D. G. Bentham,
F/Sgt J. S. Patman.

Shortly after take off from Bône Airfield (now Annaba), en engine failed. The aircraft stalled and crashed. The copilot was killed while five other crew members were injured.
Crew:
F/O Slade,
F/O MacDonald,
F/Sgt Lindschau,
Sgt Mutch,
Sgt Lovelace,
F/Sgt Beddell. †

Shortly after take off from McDill AFB, while in initial climb, the aircraft stalled and crashed in a huge explosion. All three occupants were killed.

The crew was engaged in a training flight and left McDill AFB in the day. In flight, while cruising at an altitude of 2,500 feet, the aircraft went out of control, dove into the ground and crashed in a huge explosion, killing all four crew members.

The crew departed Morrison AFB (Pam Beach) at 0830LT on a ferry flight to Borinquen, Porto Rico. En route, the crew attempted to transfer fuel from the auxiliary tanks but the process failed because the fuel transfer mechanism would not function properly. As there was insufficient fuel in the main tank, the crew decided to bail out and abandoned the aircraft that entered a dive and crashed on Acklins Island, bursting into flames. All four crew members were uninjured.
Crew:
Jesse F. Hunt,
Arnold Stern,
Billy R. Williams,
Ralph E. Stevens.

Thanks to Eric Wiberg and Michael Stowe for information provided.

While cruising in the vicinity of McDill AFB, on a training sortie, the twin engine aircraft went out of control and crashed into the Tampa Bay. All five crew members were killed.
Crew:
Allen M. Okell, pilot,
Reginald R. Reynolds,
Lt Roy Albert Skow,
Francis P. Martin 1.

While descending below clouds and flying over the Bay of Algiers, the twin engine aircraft was mistakenly shot down by friendly fire and crashed into the sea off Algiers. All nine crew members were killed.
Crew:
S/L P. Goode,
F/L M. T. G. Beacham,
F/Sgt H. D. Clapson,
Sgt V. Brown,
Sgt C. V. Walkinshaw,
Sgt L. Hunt,
F/O H. M. Stewart,
F/Sgt Tatlow,
LAS L. V. Bullen.

Crew was performing a training flight in the vicinity of Del Rio-Laughlin Field. After touchdown, the aircraft went out of control, veered off runway and collided with another aircraft. All four crew members were killed.
Crew:
S/Sgt Robert Harris Steed,
1st Lt Walter F. Griffin,
2nd Lt Benjamin L. Littlejohn,
S/Sgt John R. McGuire.

While returning to Australia following a bombing mission, the captain was forced to attempt an emergency landing due to fuel exhaustion. The twin engine aircraft crash landed near Woodstock and was damaged beyond repair. Seven crew members were unhurt while the eight occupant died from head injuries when he fell out of the tail section.
Crew (22nd BG):
Cpt Harry O. Patteson, pilot,
Pvt Emil H. Erickson. †

The crew was practicing single-engine circuits at Fayid AFB. On final approach, the pilot lost control of the aircraft that stalled and crashed short of runway. Both crew members were killed.
Crew:
P/O H. Fletcher, pilot,
LAC J. I. Lewis, flight engineer.