HISTORY OF FLIGHTOn June 5, 2022, about 1630 central daylight time, a Schweizer SGS 135C glider, N2817H, was undamaged when the pilot was found deceased after landing near Midlothian, Texas. The glider was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. According to members of the Texas Soaring Association (TSA), the pilot was launched via aerotow around 1500 that day. About 1700, the glider was found by another pilot as he landed at TSA Gliderport (TA11), Midlothian, Texas. The pilot was found strapped in his parachute and harness with the canopy closed despite temperatures in excess of 90°F. The glider was about 150 yards from the intended landing area in an open field. (See Figure 1.) None of the other pilots recalled hearing any landing radio calls or distress calls from the pilot. The exact time the pilot landed was not determined. Figure 1. Location of the glider as found. PERSONNEL INFORMATIONThe pilot’s logbook was not located during the investigation. The pilot’s total experience in gliders could not be determined; however, he was an active member of the Texas Soaring Association and owned gliders for over 14 years. AIRCRAFT INFORMATIONThe glider logbooks were not located during the investigation, and the date of its most recent annual inspection was not determined. AIRPORT INFORMATIONThe glider logbooks were not located during the investigation, and the date of its most recent annual inspection was not determined. WRECKAGE AND IMPACT INFORMATIONThe glider was located in an open field, as seen in Figure 2. Figure 2. Glider at the accident site. Examination of the glider did not reveal any damage or evidence of a hard landing. The flaps were found fully extended with the flap handle locked in the detent. Flight control continuity was confirmed from the cockpit controls to the flight control surfaces. Disassembly of the glider for transportation found that the LSP-1 safety pin was not installed to secure the clevis pin that connected the left aileron pushrod to the aileron idler horn. Despite being partially unseated, the clevis pin was seated adequately for operation of the aileron. (See Figure 3.) The right aileron was properly secured. No other anomalies were detected with the airframe that would have precluded normal operations. Figure 3. Aileron connection to the aileron idler horn. MEDICAL AND PATHOLOGICAL INFORMATIONAn autopsy was performed on the pilot by the Southwestern Institute of Forensic Sciences at Dallas, Texas. The cause of death was aortic dissection associated with hypertensive and atherosclerotic cardiovascular disease. Blunt force injuries were also noted as contributing. The manner of death was ruled as accident. An aortic dissection is a complication of chronic high blood pressure. Constant high blood pressure and turbulent blood flow cause a tear in the inner layer of the aorta (the large blood vessel that exits the heart) and blood rushes into the layers of the aorta, splitting them. In the worst cases, as in this one, it tears through all the layers and out into the mediastinum, interrupting blood flow to the rest of the body. Toxicology testing performed by the FAA’s Forensic Sciences Laboratory identified amlodipine and alfuzosin in liver; amlodipine was also identified in muscle tissue, but testing was inconclusive for alfuzosin in muscle. Testing was negative for ethanol. Amlodipine is a calcium channel blocker used to treat high blood pressure and coronary artery disease. Alfuzosin is an antagonist and is used to treat the symptoms of an enlarged prostate.