On 25 June 1925, KLM-owned Fokker F.III H-NABM was a passenger flight from Schiphol Airport, the Netherlands to Paris, France.

Due to the impact of the crash, there were expectations that there would be a decrease in airplane tickets; not only for KLM but in general.

The aircraft had a cruising speed of 135 km/h, a maximum take-off weight of 1900 kg and a flight range of 1000 km.

[7] The route to Paris in Northern France was along the Forêt de Mormal, a hilly area terrain with dense forests .

Witnesses later stated that judging the sound of the airplane, the plane was circling and they believed the pilot was trying to get a ground view.

The experts assumed that Klunder must have not been aware that he was flying so low over trees at a higher part of the forest.

[8][4][3] The trail of broken trees was approximately 40 meters long, the Siddeley Puma engine (no.

Lumberjacks who saw the airplane above the forest and shortly after in a sudden dive, started searching for the aircraft.

[6] Groeneveld Meyer, representative of KLM and Van Ewijk of the Government Study Service went to the crash site.

[7] The plane was completely destroyed and no parts of the wreckage were valuable enough to be transported back to the Netherlands.

[10] The accident led to discussion about high aviation insurance costs, as there was only one airline in the Netherlands.

[3] French aviation was asked to lead the investigation into the accident and a Direction des Services de la navigation aérienne was formed.

[7] The Rijksluchtvaartdienst [nl] (“Rijksstudiedienst voor de Luchtvaart” at the time) led by ir.