2 fatalities

XB-906 Prototype Crash During Test Flight (NX9652)

Dearborn, United States of AmericaFlight

On September 19, 1931, a Ford 5 (registration NX9652) operated by Ford Motor Company was involved in an aviation accident near Dearborn, United States of America in flight. 2 people were killed. Investigators recorded the probable cause as: Both wings detached in flight due to overload from excessive aerodynamic forces during a high-speed maneuver. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 4 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-08-04Data APIEditorial standards

An XB-906 prototype lost both wings during a high-speed maneuver near the airport, resulting in an uncontrolled descent and fatal crash for the two crew members.

What happened

The incident involved the first XB-906 prototype, an aircraft based on the Ford 5 design and intended for the US Army. The crew was conducting a local test flight in the vicinity of the airport when the accident occurred. During the maneuvering phase, the pilot completed a steep turn at high speed. Immediately following this action, both wings were torn off the airframe. The loss of lift caused the aircraft to enter an uncontrolled descent. It struck the ground near the runway and burst into flames upon impact. Both individuals on board were killed in the crash.

Findings

The official investigation determined that the structural failure was the primary event leading to the loss of control. The wings detached from the fuselage while the aircraft was airborne. This separation is attributed to the airframe being subjected to excessive aerodynamic forces during the high-speed turn, which likely exceeded the structural limits of the wing attachments.

Probable cause

Both wings detached in flight due to overload from excessive aerodynamic forces during a high-speed maneuver.