HISTORY OF FLIGHTOn November 20, 2019, about 0600 central standard time, a Raytheon (Beechcraft) A36 airplane, N88855, was destroyed when it was involved in an accident near San Marcos, Texas. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 business flight. The pilot filed an instrument flight rules flight plan and was issued a clearance for departure, but the pilot did not make contact with air traffic control after takeoff, nor did he transmit any distress calls. The airplane was observed on radar after departure, but radar contact was lost shortly thereafter. A witness reported that he saw the airplane taxi by his hangar before it departed. He stated that the airport’s weather observing station was reporting an overcast ceiling 300 ft above ground level and 1/4-mile visibility at the time. He stated that the visibility was less than reported, adding that he could barely see the accident airplane near the runway because the weather was so poor. The witness reported that the engine sounded “normal” and that the engine rpm increased, so he assumed that the airplane departed. The wreckage was located about ½ mile northeast of the departure runway. PERSONNEL INFORMATIONThe pilot was issued a temporary airman’s certificate on November 12, 2019, for Second-in-Command (SIC) privileges for a Cessna 650. A review of the pilot’s resume revealed 81 total hours of instrument experience (actual and simulated). METEOROLOGICAL INFORMATIONAt 0556, the automated weather facility located at HYI recorded wind from 179° degrees at 4 knots, 1/2-mile visibility in fog, an overcast cloud ceiling at 300 ft above ground level, temperature 63°F, and dew point 63°F. The pilot accessed weather information through ForeFlight the night before the accident and again about one hour before departure. The information provided included a forecast for continued low instrument flight rules (LIFR) conditions through the morning of the accident. Additional weather information is included in the public docket for this accident. WRECKAGE AND IMPACT INFORMATIONThe airplane impacted terrain in a firearm target practice area. The entire wingspan displayed accordion-like crush damage. The cabin area was crushed and the engine was buried in the ground. Airplane damage and ground scars were consistent with a near-vertical impact attitude. There was no post-crash fire. Control continuity was partially established from the cockpit to the corresponding flight control surfaces through multiple cuts made by first responders. The landing gear was retracted and the flap actuator was extended about 1 3/8 inches, which corresponded to a flaps-retracted position. The wing fuel tank bladders were ruptured and the fuel selector was on the right fuel tank position. Residual fuel was consistent with 100LL aviation fuel and did not contain water. The airplane was equipped with a standby instrument air pump driven by an electric motor. The pump was separated from the electric motor and disassembled. The carbon rotor and vanes were impact damaged. The drive coupling was intact. The engine-driven instrument air pump remained attached to the engine. The pump was removed, and the drive coupling was found intact. The carbon rotor and vanes were impact damaged. All fracture edges were sharp, and the broken pieces remained tightly together. The engine displayed significant impact damage, and the crankshaft could not be rotated by hand. Internal engine components were observed through use of a borescope. The rocker covers were removed, and no discrepancies were noted with the valve train and accessory section. The two magnetos were removed and rotated by hand; spark was observed from each top ignition lead. The engine-driven fuel pump was intact and the drive shaft rotated, with some binding, when operated by hand. The top set of sparkplugs exhibited normal-colored combustion deposits and “worn out-normal” electrodes when compared to the Champion Check-a-Plug guide. The fuel throttle body and mixture control were recovered and examined. The throttle plate was in the “full” open position. All control arms remained attached to corresponding shafts and attaching hardware was intact. The fuel screen was removed and was free of debris. The propeller separated from the crankshaft flange; two of the three propeller blades remained in the propeller hub; the third bladed separated from the hub. All three blades exhibited leading edge gouging and twisting. MEDICAL AND PATHOLOGICAL INFORMATIONThe Central Texas Autopsy, PLLC, Lockhart, Texas, under the authority of the Justice of the Peace, Caldwell County, conducted an autopsy on the pilot. The cause of death was determined to be "multiple traumatic injuries.” The Federal Aviation Administration’s (FAA) Forensic Sciences Laboratory conducted toxicological testing on the pilot. Tests were negative for ethanol and tested-for drugs.