1970 Atlantic Ocean Antonov An-22 crash

Template:Infobox aircraft occurrence

On July 18, 1970, a Soviet Air Forces Antonov An-22 crashed in the Atlantic Ocean between Greenland and Iceland during its route to Halifax, Canada. This incident marked the first fatal accident involving the Antonov An-22 model, resulting in the loss of all 22 individuals on board.

Aircraft

The aircraft involved was a heavy-lift Antonov An-22 freighter manufactured at the Tashkent Mechanical Plant between late 1969 and early 1970. It bore the construction number 00340207 and serial number 02-07. Assigned to the Soviet Air Forces, it carried the registration CCCP-09303, and was based at Ivanovo Severny Air Base near Ivanovo.

Background and flight

In response to the devastating 1970 Ancash earthquake in Peru, which caused massive casualties and widespread destruction, the Soviet Air Forces' 81st Military Transport Aviation Regiment was tasked with delivering humanitarian aid. This regiment operated several heavy-lift planes including the Antonov An-22. Due to the extensive distance exceeding 17,000 kilometres (10,600 mi; 9,200 nmi) and substantial cargo weight including seven passengers, the mission required multiple refueling stops en route to Peru. Two flight crews were assigned both to manage pilot fatigue and provide training experience.

Crash

On July 18, after departing from Keflavik Airport in Iceland heading toward Halifax, contact with the aircraft was lost 47 minutes into the flight at approximately 14:30. The plane vanished from radar without responding to air traffic control communications, and no landing was logged at any subsequent airports. Consequently, it was concluded that the aircraft had crashed into the ocean. A search and rescue operation commenced involving NATO forces and a Soviet Antonov An-12. Debris recovered from the ocean confirmed the crash occurred with no survivors found.

Investigation

Examination of the aircraft debris ruled out the possibility of a fire occurring during flight. The Soviet Ministry of Aviation Production proposed that an uncontrolled decompression took place, although the precise cause was never definitively identified.

Approximately five months after the CCCP-09303 accident, a similar aircraft crashed in India, resulting in the deaths of all 17 individuals on board. This incident was attributed to the detachment of a propeller blade, which impacted the aircraft's fuselage and triggered a sudden explosive decompression. It is widely believed that a comparable event led to the CCCP-09303 crash over the Atlantic.

Aftermath

In the wake of the tragedy, all pressurized An-22 models were temporarily grounded. Monuments honoring the crew members of CCCP-09303 were erected in both Moscow and Lima.