KLM Flight 608

On 23 August 1954, the aircraft crashed in the North Sea off IJmuiden during the Shannon-Amsterdam leg of the flight.

At 11:35, air traffic controllers cleared Flight 608 to descend to 2500 feet but received no response.

Salvage work using an experimental sonar system ended on 25 November, with 45-50% of the wreckage brought ashore.

An investigator from the State Aviation Authority claims that the crash may have been caused by a faulty cabin heater.

Because of the fumes from the heater, the crew may have attempted to open a cockpit window, and due to the risk of fire, the electrical system was probably turned off, explaining the radio silence.