What happened
During a localizer approach, the pilot was instructed by Atlanta Center to maintain an altitude of 5,000 feet until reaching the final approach fix (FAF). After being unable to complete the landing, the pilot executed a missed approach. Following a handoff to Chattanooga Approach, the pilot received clearance to cross the FAF at 3,000 feet for a second localizer approach attempt. Shortly before reaching the FAF, the pilot was directed to switch to the airport advisory frequency. After acknowledging this instruction, all communication with the aircraft ceased.
Witnesses subsequently reported hearing the aircraft crash near the runway's approach end. Investigation of the wreckage revealed that the aircraft had impacted a grassy area approximately 1,100 feet from the runway threshold while still on the localizer. Analysis of propeller slash marks indicated that both engines were functioning at approach power and the aircraft was traveling at approach speed at the time of impact. There was no evidence of structural failure, mechanical malfunction, or issues with the flight controls or engines prior to the crash.
Findings
At the time of the accident, weather conditions included 300-foot overcast ceilings and 1/2 mile visibility due to fog. The minimum descent altitude for the localizer approach was 1,180 feet MSL, while the airport elevation was 710 feet. Regarding the pilot's condition, the individual had completed 8 flight hours and had been on duty for 13.6 hours the previous day. Following a 6-hour period of rest, the pilot had only approximately 4 hours of sleep prior to the flight.