Loss of engine power (total): Shield AI MQ-35 V-BAT, N443VA, accident occurred on April 8, 2025, at Bisbee Douglas International Airport (DUG/KDUG), Douglas, Arizona

• Location: Douglas, Arizona 
• Accident Number: WPR25LA135 
• Date & Time: April 8, 2025, 14:55 Local 
• Registration: N443VA 
• Aircraft: Martin Uav VBAT 
• Aircraft Damage: Substantial 
• Defining Event: Loss of engine power (total)
•  Injuries: 2 None 
• Flight Conducted Under: Part 91: General aviation - Flight test

https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/200022/pdf

https://data.ntsb.gov/Docket?ProjectID=200022

The operator of the unmanned aircraft system (UAS) reported that during a test flight, the throttle servo malfunction resulting in complete loss of engine power. The pilot was able to maneuver the UAS to a safe location where it impacted terrain, resulting in substantial damage to the fuselage and flight control surfaces. 

- Probable Cause: The malfunction of the throttle servo which resulted in the complete loss of engine power.