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The Lockheed WV-3 Super Constellation, BuNo 137893, took off from Guam at 06:00 in the morning of September 1956 on a weather recon mission with an 18 man crew. The flight was normal for the first 14 hours or so. On the return leg, when the flight was 200 miles from Guam, when it lost engine #1 due to oil starvation. The engine was shut down and the propeller feathered. The pilot reported his position to Guam central and the radioman sent the position to the VW3 squadron duty office where it was tracked. The flight continued toward Guam at an altitude of 1200 feet. With 100 miles to go #4 engine experienced complete loss of power and was shut down. The propeller was feathered. However, the propeller never went to full feather and windmilled. There was a violent swerve to the right. Shortly after this, engines #2 and #3 started to lose power. At 80 miles from Guam and losing altitude at 500 to 700 feet per minute the captain decided to ditch the aircraft while he still had lateral control and issued the "Prepare to Ditch" command. Navigator Wanbaugh gave an updated position report to the pilot and radioman for the "May-Day" transmissions. A ditching was carried out. All 18 occupants climbed into two life rafts, already deployed, and pushed off at around 22:00. At about 03:20 on September 18th, the life rafts were sighted by a P2V Neptune aircraft flying search and rescue. The occupants were rescued by Coast Guard Cutter Buttonwood.
Source:
https://aviation-safety.net/database/record.php?id=19560917-1

The crew was engaged in a weather mission for typhoon 'Emma' but failed to return to his base at Yokota AFB. The exact circumstances of the accident remains unknown and all 16 crew members have been killed.

While cruising from Iceland to the US, the crew informed ground about engine problems and the captain decided to ditch the aircraft about 385 km southwest of the Icelandic coast. In unknown circumstances, the airplane crashed into the ocean and all 17 occupants were killed.

The crew was completing a flight from Pope AFB to Tachikawa with intermediate stops at McClellan AFB and Hickam AFB. While cruising about 1,046 km northeast of Hickam AFB, a propeller blade failed. As the crew was unable to feather the propeller, they decided to bail out and abandoned the airplane that crash into the ocean. A crew member was killed while four others were rescued.

The crew was engaged in a rescue mission after an Icelandic trawler was missing. The aircraft crashed in unknown circumstances about 208 km west of Barra Island, Hebrides Islands. Few debris were found and none of the nine crew members survived the crash.

The aircraft left Guantánamo Bay NAS in Cuba on a meteorological mission consisting of investigations of the hurricane 'Janet' that was classified in cat 4 and approaching Jamaica from the south. While penetrating the eye of the hurricane at an altitude of about 700 feet, the airplane went out of control and crashed into the sea, some 480 km southwest of the Jamaican coast. SAR operations were conducted but eventually suspended after few days as no trace of the aircraft nor the eleven occupants was found. There were nine crew members and two journalists on board.

Trip 7413-23 originated at Travis Air Force Base, California, its destination Tokyo, Japan, with scheduled refueling stops at Honolulu and Wake Island. The cargo load of 15,33 pounds was properly secured and distributed relative to the center of gravity. The flight departed Travis Air Force Base at 0958 and arrived at Honolulu at 2211, September 23, 1955, without incident. The crew consisted of Captain A. J. Machado. First Off leer W. F. Gin, Copilot R. C. Hightower. and Navigators R. C. Olsen and D. Ventresca. No maintenance work was required at Honolulu and the aircraft was refueled to 3,016 gallons for the flight to Wake Island. There was no offloading or loading of cargo. Gross weight of the aircraft at the time of takeoff from Honolulu was 72.993 pounds; there was no change in the flight crew. The flight departed Honolulu at 0013, September 24, 1955, on an IFR (Instrument Plight Rules) flight plan to Wake Airport via Green 9, Rhumbline Track, to maintain 8,000 feet. Routine hourly position, fuel remaining and weather reports ware made to Honolulu ARTC (Air Route Traffic Center) as the flight progressed and at 0630 control of the flight was transferred to Wake Island ARTC. At 0633 an emergency was declared to Wake ARTC, the flight advising of loss of power in three engines and inability to return to Honolulu. The aircraft was ditched during darkness at approximately 0641 at position 20 degrees 20' N. latitude 175 degrees 45' W. longitude. Neither Wake nor Honolulu radio was able to maintain contact with the aircraft; therefore Air Search and Rescue was alerted and an extensive search was commenced using both aircraft and surface vessels. At approximately 1318 on September 25 the SS Steel Advocate sighted and picked up Captain Machado and Copilot Hightower who were floating in life jackets. The two survivors reported that Navigator Ventresca went down with the aircraft and First Officer Gin and Navigator Olsen died while in the water. Weather briefing at Honolulu indicated a low pressure trough to be crossed at about 165 degrees W. longitude; there were no fronts to be crossed. The forecast indicated that scattered cumulus clouds would prevail over the intended route with tops mostly 12,000 feet and lower. Review of the weather indicates no rain showers at the time and place of ditching. Sea swells in the ditching area wore probably 4 to 6 feet high with the sea surface intermittently in deep shadow and faintly illuminated by the moon, which was in its first quarter.

Enroute from Tripoli to Athens, the crew encountered engine problems and elected to ditch the aircraft 145 km north of the Libyan coast. About 15 minutes after the emergency landing, the crew of a USN SA-16 Albatross was able to evacuate all 18 occupants safely. Later, the C-47 sank and was lost. The crew was performing a flight from Mitiga Airfield to Hassani Airport in Athens.

On a flight from Bukhta Somnitelnaya (Wrangel Island) to a drifting ice floe in the central Arctic Basin when the ski of the right main landing gear hit an ice hummock during the landing run and broke. The nose of the aircraft touched the ice and the fuselage broke into three when falling back onto the ice. All 6 crew and 4 passengers escaped unhurt and were evacuated by another aircraft. The wreck was set on fire and abandoned on the drifting ice floe. It was spotted by an aircraft of the Icelandic Coast Guard about 155 miles north-west of Iceland (approximately 10-20 miles off Scoresby Sound on Greenland's East Coast) 11DEC1959 but could no longer be found a few days later because of fog. It eventually sank.

Enroute from the US to Europe, while in cruising altitude, the crew sent a brief mayday message, reporting an engine explosion. Shortly later, the airplane went into a dive and crashed into the Atlantic Ocean some 145 km southwest of Reykjavik. All nine crew members were killed.