De Havilland DHC-2 Beaver

Crashed during thunder storm . The aircraft was seen to leave cloud in a steep dive, whereupon a wing folded and the crash occurred. It was believed that the aircraft had suffered inadvertent 'negative G' during the thunderstorm activity and as a result the bottom wing strut bolt had sheered, thus the wing was no longer correctly braced. It is believed that the US Military Beaver fleet had also suffered a number of similar fatal accidents under these circumstances.

LTC Mendes of the U.S. 1st Army borrowed the plane, designated as a TU-6A from the Rhode Island Army National Guard on the previous day (Saturday) under the pretence of obtaining additional flight time for his certification. Officially, Mendes’ mission was to deliver a helicopter part to the Vermont Army National Guard. He took off from the Theodore Francis Green airport in Warwick, RI., and flew to Burlington, VT., with two stops en route – contrary to his official flight plan. At Hanscom Field in Bedford, MA., he picked up three persons – all unauthorized civilians. In Laconia, NH., they were joined by another unauthorized civilian. On arrival in Burlington, they stopped overnight. Sunday afternoon, the TU-6A Beaver took off from Burlington in a serious snow squall and shortly after lift-off LTC Mendes radioed that he was experiencing trouble with an aileron. The aircraft subsequently spun into the ground. It appears that no pre flight check was completed and the accident was caused by a build up of ice on the wings. The aircraft is reported as destroyed and the pilot and the four passengers received fatal injuries.
Source: www.dhc-2.com

The crew was engaged in a local training flight. Shortly after takeoff from Cần Thơ Airfield, while climbing to a height of 1,000 feet, the airplane collided with a South Vietnam Air Force Bell UH-1H that was completing an evacuation mission, carrying two crew members and 13 passengers, among them few children. Following the collision, both planes crashed in a field, killing all 18 occupants.

While completing a local training flight at Fort Benning AFB (Lawson AAF), the single engine aircraft crashed in unknown circumstances. Both crew members were killed.
Crew:
lward E. Crow,
PV2 Charles R. Grimsinger.

While approaching Manizales-La Nubia Airport, the engine failed. The pilot lost control of the airplane that crashed few km from the airfield. Two passengers survived while five other occupants were killed.

Crashed during take-off from Sharjah, Oman after the tail hit bushes and suffered Category 4 or 5 damage when starboard elevator was torn off. It was returned to the UK by HS Andover XS642 and it languished at 70 Aircraft Workshops, REME, Middle Wallop, during 1970 & 1971 and then Hawker Siddeley Aircraft (HAS) at Hawarden, Chester for rebuild. This was abandoned and the aircraft was struck off charge on 04-Mar-1971. Parts were used with XP815 (crashed 09-Sep-1962) in making a virtually complete composite airframe, and later marked as XP822 with that aircrafts c/n plate.
Source: www.dhc-2.com

While searching mountainous terrain for a missing aircraft, the pilot entered a narrow mountain valley at low altitude. While attempting to round to come back out of it the aircraft struck a tall tree while in a 60° bank to the left. and crashed in flames and burned. Four Persons sustained fatal injuries.
Source: www.dhc-2.com

While descending to Moshabong Lake and completing a last turn, the pilot lost control of the airplane that stalled and crashed into the lake near the shore. Two passengers were killed while a third one and the pilot were seriously injured.

Crashed in unknown circumstances while approaching El Charco. Two passengers were killed.

Upon landing on a swift river near Wenatchee, the float equipped aircraft crashed and partially sank. The pilot was rescued while the passenger drowned.