| Date: | Friday 11 November 1966 |
| Time: | 01:27 |
| Type: |  Lockheed EC-121H Super Constellation |
| Owner/operator: | United States Air Force - USAF |
| Registration: | 55-5262 |
| MSN: | 4413 |
| Year of manufacture: | 1956 |
| Fatalities: | Fatalities: 19 / Occupants: 19 |
| Aircraft damage: | Destroyed, written off |
| Category: | Accident |
| Location: | 200 km E off Nantucket, MA, USA -
 Atlantic Ocean
|
| Phase: | En route |
| Nature: | Military |
| Departure airport: | Falmouth-Otis AFB, MA (FMH/KFMH) |
| Falmouth-Otis AFB, MA (FMH/KFMH) |
The Lockheed EC-121H Super Constellation, attached to the 961st Airborne Early Warning and Control Squadron, was assigned to an air defense mission to airborne long-range input (ALRI) station 2.
Estimated time en route was 9 hours plus 50 minutes.
On 10 November, 1966 at 23:38 local time, the aircraft taxied to the maintenance ramp reporting malfunctions on the no. 1 engine #1 cylinder And no. 2 engine #1 power Recovery Turbine (prt). The spark plugs, coils and leads were changed on #1 cylinder no. 1 engine, and the clamps were tightened on #1 PRT, no. 2 engine. Engines were again started at 00:20, November 11, and the aircraft took off from Otis AFB runway 23 at 00:37.
While en route the flight crew radioed: "still have flames coming from PRT #2 engine". However the aircraft-continued on its mission.
At 01:25 all radar contact was lost. A minute later the aircraft was seen to pass over two fishing vessels at low altitude (150-200ft). One or more engines were heard to be backfiring.
The aircraft later hit the water and burst into flames.
Only a widening oil slick and a few bits of floating debris marked the spot of the crash. Recovered were pieces of aircraft skin and insulation, a seat with a cushion, and three empty life preservers. Air Force officials identified them as from the missing plane.
Sources:
www.dean-boys.com
Location
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