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CHI91LA279

1991-09-01 · DECATUR, Illinois, United States · None · 1 aircraft · Status: Completed

Airport DEC

N686EE has since been reassigned. It is now registered to a different aircraft (SONEX AIRCRAFT ONEX, built 2018), which was not involved in this event.

Aircraft involved

Probable cause & findings

INADEQUATE PREFLIGHT PLANNING AND PREPARATION AND AIRPLANE PERFORMANCE DATA NOT UNDERSTOOD BY THE PILOT. FACTORS ASSOCIATED WITH THE ACCIDENT ARE THE PILOT'S LACK OF TOTAL EXPERIENCE IN TYPE OF OPERATION, DELAYED REMEDIAL ACTION, AND THE OPERATOR'S INSUFFICIENT STANDARDS AND REQUIREMENTS.

Factual narrative

THE ACCIDENT AIRPLANE COLLIDED WITH TREES AND TERRAIN WHILE ATTEMPTING TO CLIMB FROM TAKEOFF WITH A SAILPLANE IN TOW. THE SAILPLANE RELEASED FROM THE TOW PLANE AND RETURNED TO THE DEPARTURE AIRPORT. ACCORDING TO THE PILOT THE AIRPLANE ENCOUNTERED LIGHT TO MODERATE TURBULENCE DURING INITIAL CLIMB AND THE AIRPLANE SANK INTO TREES ONE MILE NORTH OF THE AIRPORT. IN AN INTERVIEW AFTER THE ACCIDENT THE PILOT DID NOT REMEMBER DOING A WEIGHT AND BALANCE CALCULATION BEFORE TAKEOFF. WHEN QUESTIONED ABOUT STALL RECOGNITION AND RECOVERY THE PILOT STATED THAT THE ACCIDENT AIRPLANE WAS DIFFERENT FROM OTHER AIRCRAFT IN THAT YOU ONLY HAD TO HOLD THE NOSE UP AND THE AIRPLANE WOULD FLY ITSELF OUT. THE DENSITY ALTITUDE AT THE TIME OF THE ACCIDENT WAS 2500 FEET. THE AIRPLANE WAS ESTIMATED TO BE AT OR SLIGHTLY ABOVE ALLOWABLE GROSS WEIGHT AT TAKEOFF. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1991_CHI91LA279.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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