While Climbing To Cruise Altitude After Takeoff, The Engine Suddenly Lost Total Power

Location: Genoa Township, Michigan Accident Number: CEN23LA371
Date & Time: August 19, 2023, 08:20 Local Registration: N29TM
Aircraft: Rutan Longez Aircraft Damage: Substantial
Defining Event: Loss of engine power (total) Injuries: 1 Minor
Flight Conducted Under: Part 91: General aviation - Personal

Analysis: The pilot reported that, while climbing to cruise altitude after takeoff, the engine suddenly lost total power. He attempted to restart the engine, but was unsuccessful, and subsequently conducted a forced landing into a pond. While maneuvering, the airplane impacted a tree, resulting in substantial damage to both wings and the fuselage.

Examination of the engine revealed no evidence of any mechanical malfunctions or failures that would have precluded normal operation. The magnetos had evidence of exposure to high temperature; however, both magnetos functioned when bench tested. Blast tubes for magneto cooling were installed, but the effectiveness of the blast tubes could not be determined. The reason for the loss of engine power could not be determined. 

Probable Cause and Findings: The National Transportation Safety Board determines the probable cause(s) of this accident to be -- A total loss of engine power for undetermined reasons.

FMI: www.ntsb.gov