NTSB Probable Cause

THE PILOT FAILED TO MAINTAIN AIRSPEED DURING TAKEOFF. CONTRIBUTING FACTORS RELATED TO THE HIGH DENSITY ALTITUDE CONDITION, THE AIRCRAFT'S EXCESSIVE WEIGHT AND THE PILOT'S FAILURE TO LEAN THE MIXTURE. ALSO CONTRIBUTING TO THE ACCIDENT WAS THE PILOT'S IMPROPER REMEDIAL ACTION TO AFFECT RECOVERY FROM THE DEVELOPING STALL, HIS POOR JUDGEMENT, HIS LACK OF EXPERIENCE IN THE AIRPLANE, AND HIS IMPAIRED PHYSIOLOGICAL CONDITION AS IT RELATED TO HIS LACK OF SLEEP AND DRUG USE.