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Accident description
Last updated: 17 October 2017
Status:
Date:Tuesday 28 March 1961
Time:20:09
Type:Silhouette image of generic IL18 model; specific model in this crash may look slightly different
Ilyushin 18V
Operator:CSA Ceskoslovenské Aerolinie
Registration: OK-OAD
C/n / msn: 180002102
First flight: 1960
Engines: 4 Ivchenko AI-20
Crew:Fatalities: 8 / Occupants: 8
Passengers:Fatalities: 44 / Occupants: 44
Total:Fatalities: 52 / Occupants: 52
Airplane damage: Destroyed
Airplane fate: Written off (damaged beyond repair)
Location:22 km (13.8 mls) NE of Nürnberg (   Germany)
Phase: En route (ENR)
Nature:International Scheduled Passenger
Departure airport:Praha-Ruzyne International Airport (PRG/LKPR), Czech Republic
Destination airport:Zürich-Kloten Airport (ZRH/LSZH), Switzerland
Flightnumber: 511
Narrative:
An Ilyushin 18, OK-OAD, was destroyed when it crashed near Nürnberg, Germany. All 52 on board were killed.
CSA Flight OK-511 was an international passenger flight from Prague (PRH), Czechoslovakia to Conakry (CKY), Guinea with en route stops at Zurich (ZRH), Switzerland, Rabat (RBA), Morocco, and Dakar (DKR), Senegal.
It departed Prague at 19:41 and reached the cruising altitude of 6000 m at 19:53. At 20:09 the airplane disappeared off radar screens and was found to have crashed following an in-flight structural failure.

On July 12, 1961 another CSA Il-18 operating on the same flight, OK-511, crashed near Casablanca killing all 72 on board.

Probable Cause:

PROBABLE CAUSE: "In the light of the investigations under-taken, it is probable that the accident occurred in one of the following ways, although the possibility of other causes cannot be ruled out; a) Forced descent causing the aircraft to exceed the structural stress factor in the approach manoeuvre or during the pull-out owing to: 1) The aircraft falling into an uncontrollable flight position because of a defect in an artificial horizon or an electric instrument of equal importance. In air transport flight incidents throughout the world, where unintentional steep dives have occurred, such incidents can be explained by a defect in an artificial horizon. 2) An unnoticed overcontrol of the electrical rudder or aileron trim adjustment occurring when the automatic pilot was operating with flight movements resulting therefrom after the automatic pilot was disconnected. The automatic pilot was not equipped with a trim servo-indicator to give warning of excessive trim adjustment. 3) Physical incapacity of one or both pilots. b) Intentional descent owing to the presence of smoke, fire or similar emergency, during which the structural stress factor was exceeded in the approach manoeuvre or in the pull-out."

Classification:
Loss of control

Sources:
» Soviet Transports


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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Praha-Ruzyne International Airport to Zürich-Kloten Airport as the crow flies is 507 km (317 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Ilyushin Il-18

  • 569 built
  • 6th loss
  • 5th fatal accident
  • The worst accident (at the time)
  • 21st worst accident (currently)
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 Germany
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  • 4th worst accident (currently)
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