Lawsuit Alleges Pilot Ignored Critical Warnings in Experimental Mustang Crash

FREDERICKSBURG, TX – May 20, 2026 – A federal lawsuit filed in Texas is casting a harsh spotlight on the high-stakes world of experimental aircraft testing, alleging that a catastrophic crash was the direct result of a test pilot deliberately ignoring clear instrument warnings of a critical engine power failure during a maiden flight.

The complaint, filed by the law firm Danko Meredith on behalf of Canard Aero, LLC, targets aviation services company TacAero and its owner, Kevin Sutterfield. It asserts claims of negligence, gross negligence, and breach of contract following the January 5, 2026, crash and total loss of a meticulously crafted ScaleWings SW-51 Mustang replica named "Just Ducky" at Gillespie County Airport.

At the heart of the legal battle is the allegation that Sutterfield, acting as the test pilot, chose to continue with the takeoff despite cockpit instruments indicating the aircraft's Rotax 916iS engine was producing less than half of the 160 horsepower required for a safe flight. The decision, the lawsuit claims, led directly to the destruction of the nearly $800,000 aircraft.

A Maiden Flight's Final Moments

According to the allegations detailed in the court filing, TacAero was contracted by Canard Aero, LLC to perform the crucial final assembly, inspection, and FAA-mandated Phase I flight testing for "Just Ducky." This phase is a mandatory period of rigorous testing designed to ensure a newly built experimental aircraft is safe and airworthy before it is cleared for normal operations.

The SW-51 Mustang is not a typical kit plane; it is a high-fidelity, 70% scale replica of the iconic P-51 Mustang fighter from World War II, celebrated for its complex design and performance. The aircraft was powered by a modern, turbocharged Rotax 916iS engine, an advanced powerplant known for its high power-to-weight ratio.

On the day of the incident, Kevin Sutterfield, a co-owner of TacAero, positioned himself in the cockpit to conduct the aircraft's very first flight. The lawsuit alleges that Sutterfield had less than one hour of total flight time in this specific aircraft type, a factor that would typically demand an even more conservative and cautious approach to testing.

As alleged in the complaint, during the takeoff roll, the engine's instruments displayed a severe power deficiency. Rather than aborting the takeoff—a standard and expected procedure in such a scenario—Sutterfield continued. The complaint draws a stark contrast to a prior incident weeks earlier, where a different TacAero pilot, testing another aircraft in the same program, faced identical symptoms and correctly chose to abort the takeoff.

"Just Ducky" briefly became airborne but, starved of power, was unable to climb more than approximately 30 feet above the ground. It then descended rapidly, striking the ground and resulting in what the lawsuit describes as a "total loss." Sutterfield was not reported to have sustained serious injuries.

The Rigors of Experimental Test Flying

The crash and subsequent lawsuit highlight the immense responsibilities and stringent protocols that govern experimental aviation. The FAA mandates Phase I flight testing precisely to identify and resolve unforeseen issues like the one alleged in the complaint. This period is meant to methodically expand the aircraft's flight envelope within a designated test area, not to press on in the face of known deficiencies.

Aviation safety experts stress that the single most critical element in a test flight is the pilot's judgment. The decision to initiate or abort a takeoff is a fundamental go/no-go choice that leaves no room for error. "Proceeding with a takeoff when the engine is clearly not producing the required power is a profound violation of basic airmanship and testing protocols," stated one independent aviation safety consultant. "The instruments are the pilot's eyes into the health of the aircraft. Ignoring them, especially on a first flight, is incomprehensible."

Organizations like the Experimental Aircraft Association (EAA) provide extensive guidelines for test pilots, emphasizing a conservative, data-driven approach. These industry best practices universally call for an immediate abort if full, stable power is not achieved and verified during the engine run-up and initial takeoff roll. The lawsuit implicitly argues that Sutterfield's alleged actions stand in direct opposition to these established safety standards.

Legal Battle and Financial Fallout

The lawsuit, filed in the U.S. District Court for the Western District of Texas, seeks to hold both TacAero as a corporate entity and Kevin Sutterfield individually accountable for the loss. Canard Aero is seeking damages of no less than $792,661.

This figure, according to the complaint, is not merely the value of the aircraft itself. It represents a comprehensive calculation of the financial devastation, including the cost of a replacement aircraft, non-refundable FAA-mandated builder trip costs, expenses paid to TacAero for the reassembly and flight testing that ended in destruction, tax damages, and compensation for the loss of use of the aircraft.

Court records indicate the legal fight is already underway. Both TacAero (operating as Hangar 15, LLC) and Kevin Sutterfield filed motions to dismiss the case in March 2024, arguing a lack of personal jurisdiction. The plaintiff, Canard Aero, filed its opposition to these motions in April, and the case remains active while awaiting a ruling from the court. The defendants have not yet filed a formal response to the specific allegations of negligence laid out in the complaint.

The case ultimately scrutinizes the contractual and professional obligations of companies that provide specialized services in the experimental aircraft sector. For owners who invest hundreds of thousands of dollars and countless hours into their dream aircraft, the expectation of professional diligence, expertise, and unwavering adherence to safety from their contractors is absolute.