What happened
The flight originated from Mountain View with the specific objective of conducting a bombing exercise. During the cruise phase over Lake Ontario, the pilot reported encountering poor weather conditions. The aircraft subsequently failed to return to its base and is believed to have impacted the water surface, potentially near Toronto. All three crew members on board were killed in the incident.
Findings
The official investigation concluded that the probable cause of the accident was undetermined. No specific mechanical failures or human error factors were definitively identified in the available records.