Survey / Patrol / Reconnaissance

While observing a roadwatch team insertion along the 'Ho Chi Minh Trail', the airplane suffered an engine failure. The pilot attempted an emergency landing when the airplane crashed in a prairie. The aircraft was wrecked and all occupants were rescued and evacuated by the crew of a USAF CH-53. The accident occurred in April 1971 (exact date remains unknown).

The electronic warfare airplane was engaged in a radio research mission out from Huế-Phu Bai Airport. En route, it was shot down by a surface-to-air missile and crashed near the demilitarized zone (DMZ). All five occupants were killed.
Crew:
Cpt Michael W. Marker, pilot,
Wo1 Harold L. Algaard, copilot.
Passengers:
Sp5 Rodney D. Osborne,
Sp5 Richard J. Hentz,
Sp6 John T. Strawn.

While completing a maritime patrol flight, the crew informed ground about an engine fire. Shortly later, in a second message, the crew confirmed the fire was extinguished. Seven minutes later, control was lost and the airplane entered a dive before crashing into the Barents Sea, off the Bear Island, south of the Svalbard Archipelago. The aircraft was totally destroyed and all 12 crew members were killed.

On approach to Lorient-Lann-Bihoué NAS, the crew encountered poor weather conditions with fog. On final, the pilot failed to realize his altitude was too low when the airplane struck the ground and crashed few hundred yards short of runway 26 threshold. Three crew members were seriously wounded while six others were killed.
Those killed were:
Ens Valbur, pilot,
O/T Lars, copilot,
1st Mst Busson, navigator,
1st Mst Jaffré, electrician,
1st Mst Le Goff, mechanic,
2nd Mst Le Bihan, mechanic.

While in a mission in the A Shau Valley at an altitude of 5,500 feet, the aircraft was hit by enemy fire. An engine was losing oil and the crew decided to return to Huế Airport. Unable to maintain the minimum prescribed altitude, the captain elected to make an emergency landing when the airplane crashed 32 km southwest of Huế. The captain and the flight engineer were killed while seven other occupants were injured.
Those killed were:
1st Lt George M. Wall,
S/Sgt Michael R. Conner.

While completing a maritime patrol flight and while cruising 112 km off Đồng Hới, the crew informed ground about fire in the cockpit and elected to return to USS Coral Sea. Shortly later, the airplane crashed into the Gulf of Tonkin. All five crew members were killed.
Crew:
Lt(jg) Charles Brooks Pfaffmann,
Lt Larry Coleman Knight,
SN Brian Lee Bushnell,
SN Andrew Anthony Horchar,
AMEC Jack Lee Wright.

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 completing a mission on behalf of the Royal Thai Border Police, the airplane struck the slope of Mt Nang Keo. All six occupants were killed.

On final approach to Đà Nẵng, both engines failed. The airplane stalled and crashed 2 km short of runway threshold. All 10 occupants were injured and the aircraft was destroyed. The crew was returning to Đà Nẵng following a reconnaissance mission.

Prong 33 took off from Phù Cát on the afternoon of the 8th on a planned seven-hour RDF mission. However, just 20 minutes after take off the pilot radioed that he was returning to base because of a problem with the doppler navigation equipment. The aircraft landed safely and although the doppler was fixed, the aircraft weather radar was found to be unusable. Despite bad weather in the flight area, the pilot was told to take off again but to return before dark if the weather worsened. When the aircraft reached its intended area or operations it was found that the weather was too bad to operate safely sot 1st Lt Knight flew towards the coast to return to Phù Cát. The pilot was guided through bad weather towards Phù Cát by the GCA controller but during the approach, 1st Lt Knight reported an inverter fire followed by the loss of his gyros and attitude indicators. The GCA controller gave instructions to direct the aircraft to the airfield but radio and radar contact was lost during the approach. Search operations were hampered by bad weather and it was not until 12 October that the wreckage was located by a SAR helicopter about 15 miles southeast of Phù Cát. All six crew members were killed.
Crew:
1st Lt Ronald Harold Knight,
1st Lt Max Emmanuel Rosen,
Cpt Bradley Rogers Ransom,
T/Sgt Sylvester William Redman,
S/Sgt Elmore L. Hall,
S/Sgt Michael L. Stiglich.
Source. Chris Hobson