On July 15, 1926, a Polikarpov PM-1 (registration RR-USS) operated by Aviakhim was involved in an aviation accident near Dortmund, Germany in flight. No fatalities were reported. Investigators recorded the probable cause as: In-flight engine failure resulting from the failure of a connecting rod. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 2 related events involving the same aircraft type or operator are linked below.
Aircraft made an emergency landing in a field near Dortmund after engine trouble while en route from Berlin to Paris. All three occupants evacuated safely, though the plane was destroyed.
What happened
While traveling from Berlin to Paris, the pilot experienced significant mechanical issues with the aircraft's powerplant. Recognizing the severity of the situation, the pilot initiated an emergency procedure and attempted to land the machine in a suitable area. The aircraft ultimately crash-landed in an open field located near Dortmund. Following the impact, the airframe came to rest on the ground. All three individuals aboard the aircraft managed to evacuate the wreckage safely without sustaining injuries. Despite the successful evacuation of the crew and passengers, the structural integrity of the plane was compromised, resulting in damage that rendered it beyond repair.
Findings
Investigation into the incident identified a specific mechanical defect as the root cause of the emergency. The official determination concluded that the in-flight engine failure was triggered by the rupture or malfunction of a connecting rod. This component failure led to the loss of power, necessitating the immediate emergency landing.
Probable cause
In-flight engine failure resulting from the failure of a connecting rod.
What happened in the 15 Jul 1926 Polikarpov PM-1 accident near Dortmund, Germany?
Aircraft made an emergency landing in a field near Dortmund after engine trouble while en route from Berlin to Paris. All three occupants evacuated safely, though the plane was destroyed.
Were there any fatalities in the 15 Jul 1926 Polikarpov PM-1 accident?
No fatalities were recorded in this accident.
What aircraft was involved and where did it happen?
The accident on 15 Jul 1926 involved a Polikarpov PM-1, registration RR-USS, operated by Aviakhim, at Dortmund, Germany.
What was the probable cause of the accident?
In-flight engine failure resulting from the failure of a connecting rod.
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