N257AR

HISTORY OF FLIGHTOn March 23, 2019, at 1535 eastern daylight time, an experimental amateur-built Commuter Craft Innovator, N257AR, was destroyed by collision with terrain during an uncontrolled descent after takeoff from Thomas B. David Field (CZL), Calhoun, Georgia. The pilot/owner/designer/builder was fatally injured. Visual meteorological conditions prevailed, and no flight plan was filed for the flight test which was conducted under the provisions of 14 Code of Federal Regulations Part 91.

According to employees of Commuter Craft, the airplane was the prototype for an airplane planned for mass production. The airplane was flown for the first time by a test pilot on February 25, 2019 at Tom B. David Field (CLZ), Calhoun, Georgia. The test pilot completed one traffic pattern and landed. The airplane was disassembled, returned to the factory, modified according to the pilot/builder based on captured data and test-pilot observations, and then brought back to CLZ for taxi testing the day prior to the accident.

On the day of the accident, the pilot asked his assistant to fly in a "chase plane" with a camera and photograph the airplane "in case it takes off." The pilot said he did not intend to fly, would land if the airplane lifted off, and would only fly if "he had no other choice." According to his assistant, she watched from the chase plane as the airplane departed "barely above the trees," turned in the traffic pattern, and then descended from view.

According to the chase pilot, the pilot/owner instructed him to depart ahead of the accident airplane. The pilot/owner said he would take off, enter the downwind leg, "verify the plane was flying satisfactorily" and then climb the airplane to 3,000 ft. Once at altitude, the two planes would join up to capture footage of the prototype airplane in flight. Footage of the accident flight was not captured, but the pilot witnessed the accident flight from about 2,500 ft.

Video from a camera mounted on the airplane's right window show that, immediately after takeoff, the airplane displayed rapid divergences in both the pitch and roll axis and that the pilot made pronounced movements of the control stick in response. The airplane remained at treetop height throughout the upwind leg and into the crosswind turn and appeared to reach about 200 ft agl in level flight once established on the downwind leg. As the airplane accelerated, it showed rapid pitch oscillations and the amplitude of the pitch oscillations progressively increased. A handheld radio secured to the copilot's seat shoulder harness and the pilot himself were seen to "float" in the cockpit each time the airplane pitched nose down as the amplitude of the phugoid progressively increased, the duration of weightlessness displayed each time also increased.

Data recovered from an onboard recording device indicated the airplane experienced multiple pitch oscillations between about 1° nose down and 12° nose up. Engine parameters were nominal and show that the aircraft reached 100 percent power and stayed at a high-power setting until the end of the recording. During one pitch oscillation, an audible "oil pressure" warning was heard. The video ended abruptly as the pilot became unseated for about the fourth time and as the airplane appeared near treetop height. The airplane then impacted terrain.

The chase pilot watched the airplane take off and turn to the crosswind and downwind legs of the traffic pattern. He estimated the accident airplane never climbed more than 200 feet above ground level (agl), and that the airplane struggled "to maintain airspeed or a nose-up attitude." The chase pilot heard the pilot announce his intention to return to the airport, but that a reason was not specified. He said the airplane was "porpoising" in flight before the nose "dipped down" and the airplane collided with trees and terrain.

Another witness, who was also a pilot, watched the accident flight from his car as he approached the airport. The witness said that he saw the airplane, which he presumed had "just taken off," pitching and rolling about 20° left and right and nose-up and nose-down and that it appeared unstable. The witness described the crosswind turn as "steep" and estimated the bank angle at 45°. Another witness, who was inside his workshop when the airplane flew "low" overhead, said the sound of the engine was loud, smooth, and continuous until he heard the sound of impact. PERSONNEL INFORMATIONReview of Federal Aviation Administration records revealed the pilot did not hold a valid medical certificate and he had not completed a BasicMed course. A review of his logbook revealed the pilot had logged 334 total hours of flight experience.

Entries in the logbook began in 1986 and gaps of several years where the pilot logged no flights were noted. During 1986-1987, the pilot logged 40.6 hours of flight experience, then did not fly again until 1991. He flew regularly from 1991-1995 but did not fly again until 2011, where he logged only one flight. He logged 2 flights in 2017, and 3 flights in 2018.

The pilot logged 4.7 total hours of flight experience over the 3 flights in 2018. His most recent flight was 1.1 hours on April 27, 2018, in a Flight Design CTLS airplane. According to his employees and his logbook, the pilot had no experience in the Innovator airplane as either a pilot or passenger. Further, a review of the remarks section throughout his logbook revealed only rudimentary flights and flight training. The pilot had no experience as a test pilot and no such training reflected in his logbook.

According to two of the pilot's employees, the pilot discussed scheduling pressures regarding the development and fielding of the airplane. They each had conversations with the pilot about his role as designer/builder and the head of the company; they each strongly urged him to stay out of the cockpit of the accident airplane. The two employees sought and received assurances from the pilot that he would not fly the accident airplane. His executive assistant urged him to concentrate on running their operation and reported financial pressures on the pilot from an investor.

When asked about the pilot's general health, two employees described the pilot as sleep deprived and that he was sick in the days preceding and on the day of the accident. His assistant said he had a "severe cough, head and chest congestion, and fever" and was self-medicating with over-the-counter "non-drowsy" cold medication. AIRCRAFT INFORMATIONThe composite construction airplane was a two-place, twin-tailboom, rear-engine, pusher-propeller airplane, powered by a Titan IOX-370-CLD1T4 engine. According to a company employee, the airplane had accrued about 12 hours on the Hobbs meter, of which about 0.3 hours was actual flight time.

In a written statement, the pilot who performed the initial test flight of the accident airplane provided a detailed description of what he observed and experienced on that flight. He said:

As soon as I came off the ground the plane went into a wild oscillation of both pitch and roll. I ran out of elevator up trim within the first few seconds of that flight and then had a lot of control pressure involved to keep it flying around the pattern. At that point I realized I needed altitude to sort out the control-ability of the aircraft… During the flight I actually bumped off the elevator stop at least three times. I don't know how many times during that flight the aircraft departed straight and level flight, all uncommanded, however I would guess it to be around a dozen times. At one point I considered bailing out of the plane but realized I had enough control to try to line up with the airport runway and attempt a controlled landing, or at least get it back to the airport where help could be given if the landing didn't go well. As it turned out once I reduced the throttle for the final approach I was able to let off some of my control pressure for the elevator and make a very nice controlled decent… In my opinion: the aircraft demonstrated a static stability that was divergent and unstable. While dynamic stability was just barely on the stable side of neutral. These two factors obviously fought each other in the stability of the aircraft.

Video of the first half of the test flight, which was captured by an onboard camera mounted on the copilot's window, provided a cross-cockpit view of the pilot and views outside his window and part of the windscreen. Audio of ambient noise in the cockpit as well as radio communications was heard throughout. The video viewed was consistent with the narrative description provided by the test pilot. The camera's battery lost its charge mid-flight and the video ended abruptly on the upwind leg over the runway. AIRPORT INFORMATIONThe composite construction airplane was a two-place, twin-tailboom, rear-engine, pusher-propeller airplane, powered by a Titan IOX-370-CLD1T4 engine. According to a company employee, the airplane had accrued about 12 hours on the Hobbs meter, of which about 0.3 hours was actual flight time.

In a written statement, the pilot who performed the initial test flight of the accident airplane provided a detailed description of what he observed and experienced on that flight. He said:

As soon as I came off the ground the plane went into a wild oscillation of both pitch and roll. I ran out of elevator up trim within the first few seconds of that flight and then had a lot of control pressure involved to keep it flying around the pattern. At that point I realized I needed altitude to sort out the control-ability of the aircraft… During the flight I actually bumped off the elevator stop at least three times. I don't know how many times during that flight the aircraft departed straight and level flight, all uncommanded, however I would guess it to be around a dozen times. At one point I considered bailing out of the plane but realized I had enough control to try to line up with...