N259L

HISTORY OF FLIGHTOn October 19, 2017, at 0834 mountain standard time, a Peterson Lancair Legacy 2000, N259L, departed controlled flight and collided with desert terrain near Bowie, Arizona. The commercial pilot was fatally injured, and the airplane was substantially damaged. The pilot, who built the airplane, was operating the airplane as a Title 14 Code of Federal Regulations (CFR) Part 91 personal flight. The cross-country flight departed from Eagle Roost Airpark, Aguila, Arizona, about 0810 with a planned destination of Garner Field, Uvalde, Texas. Visual meteorological conditions prevailed at the time of the accident.

The pilot had planned to fly the airplane from its base in Aguila to Uvalde, about 745 nautical miles (nm) to the southeast to attend a fly-in. A flight plan outlining the pilot's intended route of flight was found in the wreckage. The flight plan showed that the pilot planned to depart at 0810 and reach the Buckeye VORTAC at 0839 and the San Simon VORTAC located about 210 nm southeast of the Buckeye VORTAC.

Federal Aviation Administration (FAA) radar data revealed that the airplane flew southeast at a cruising altitude of about 10,000 ft mean sea level (msl). The last nine radar returns occurred between 0833:16 to 0834:13. During that time, the airplane's altitude decreased from 9,850 to 7,550 ft msl. The last radar return was located about 100 ft east of the accident location (see figure 1). The airplane wreckage was located about 17 nm northwest of the San Simon VORTAC.

Figure 1. Last radar returns for the accident flight.

A witness who was in his front yard, located 0.8 nm south-southeast of the accident site, heard the airplane flying overhead. He then observed the airplane circling toward the ground, similar to an air show airplane maneuver. He reported that the sound emanating from the airplane was cutting in and out, as if the engine was sputtering, but he stated that the sound of the engine's rotation could have been echoing from the hills. WRECKAGE AND IMPACT INFORMATIONThe wreckage was located in unpopulated desert terrain at an elevation of about 3,860 ft msl. The debris path at the accident site stretched more than 120 ft along a heading of about 155°.

The left-and right-wing pieces were accounted for at the accident site. Both wings sustained crush deformation, with the leading-edge skin found forward in the debris field and not attached to the main wing section. The fuel caps and their respective flanges were found forward of their respective wings, consistent with fuel inside the wing forcing the cap outward during impact.

The canopy was found within the debris field and was fragmented into multiple sections. The latching mechanisms for both the left and right sides were consistent with the canopy being latched at the time of impact.

Control surface continuity could not be established due to the severe fragmentation of the flight control surfaces and their linkages to the cockpit controls.

The engine had sustained impact damage. The crankshaft could not be rotated despite several attempts to do so. The top spark plugs were removed, revealing a light gray coloration, which was consistent with normal operation. The cylinders were examined through the spark plug holes, revealing that the combustion chambers were mechanically undamaged and that there was no evidence of foreign object ingestion or detonation. The valves were intact and undamaged. There was no evidence of valve-to-piston face contact. The gas path and combustion signatures observed at the spark plugs, combustion chambers and exhaust system components displayed coloration that was consistent with normal operation.

One propeller blade was visible at the accident site and was found relatively straight with no evidence of twisting. The other blade was buried under the engine and had separated with the tip oriented toward the firewall and the hub near the propeller spinner. This blade was twisted at the tip and contained a 4-inch gouge where a portion of the outboard leading-edge piece had become separated; the piece was found buried near the remainder of the blade.

The fuel selector was found with the handle pointing to the left tank position. The position of the fuel selector valve was in the left position. The selector was found in several pieces. The fuel filter was partially disassembled, and the screen was found to be clean. The fuel servo was disassembled and found to contain liquid that had a smell similar to AVGAS, the diaphragms were pliable, and the valve was intact. The transducer was disassembled, and, when air was forced through the inlet, the internal wheel could be heard rotating. Removal of the fuel manifold (spider) revealed no evidence of liquid, the diaphragm was pliable, and the spring was intact.

Postaccident examination of the airframe and engine found no evidence of any mechanical malfunctions or failures that would have precluded normal operation. MEDICAL AND PATHOLOGICAL INFORMATIONAn autopsy of the pilot was performed by the Pima County Office of the Medical Examiner, Tucson, Arizona. The pilot's cause of death was blunt force injuries. Toxicology testing performed at the FAA Forensic Sciences Laboratory was negative for ethanol and all tested drugs. TESTS AND RESEARCHNumerous pieces of windscreen and airplane were sent to the Smithsonian Institution's Feather Identification Lab for examination. DNA analysis was conducted on eight samples of various windscreen pieces. None of the samples contained avian DNA. A microscopic examination was conducted on all of the pieces, and a total of 38 microslides were prepared from the material. Six of these microslides contained bird feather fragments. The feather material consisted of two pennaceous feather parts and four downy feather parts. None of the feather fragments were attributed to a specific bird species or group, but numerous birds could be excluded based on the microscopic structures found in the samples, including ducks, doves, and perching birds.

The Audubon Society chapter closest to the accident location stated that it would be possible to see sandhill cranes or raptors, such as Swainson's hawks, in the area where the accident occurred.