NTSB CAROL · Event
Event CHI97LA261
Aircraft involved
Probable cause & findings
the failure of the glider pilot to properly handle his airplane during the initial takeoff climb which resulted in the tow pilot's inability to maintain control of his airplane.
Factual narrative
On August 16, 1997, at 1400 central daylight time (cdt), a Piper PA-25-235, N9781P, operated by Hinckley Soaring, Inc., collided with the terrain following a loss of control during climb shortly after takeoff from the Hinckley Airport, Hinckley, Illinois. The airplane was towing a glider at the time. The glider released from N9781P and landed without incident. The pilot received minor injuries. The airplane was substantially damaged from impact and post impact fire. Visual meteorological conditions prevailed and no flight plan was filed. The flight originated from Hinckley, Illinois, shortly before the accident occurred. The pilot reported that shortly after rotation, at an altitude of about 50 feet above ground level (agl), he felt a "large pull" on the tail of his airplane. He glanced back and noticed the glider was "very high and off to my left side." He reported that the position of the glider put his airplane in a level to slight nose low attitude. He reported he looked forward and felt slack in the line so he thought the glider was moving back into position. Shortly thereafter, at an altitude of about 100 to 150 feet agl, he then felt a "violent jerk" which caused the nose of his airplane to pitch down to a 45 degree angle. He reported that he believes the glider was directly over his airplane at this time. He reported that the tow line was released, but his airplane continued to descend contacting the ground in a 30 degree nose down attitude. The pilot reported that the entire event occurred within 10 to 15 seconds. The pilot of the tow plane reported that after takeoff at an altitude of about 50 ft agl, he felt a 'large pull' on the tail of his airplane. He looked back and saw the glider was 'very high and off to my left side.' He then felt slack in the line at which time he thought the glider was moving back into position. At an altitude of 100' to 150' a 'violent jerk' occurred and the tow plane was forced into a nose down attitude. The tow rope was released but the airplane continued in the nose down attitude until it contacted the terrain. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1997_CHI97LA261.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (loss of control). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Scoping Review of Aviation Loss of Control Inflight Research
Loss of control – inflight (LOC-I) contributes to aircraft accidents at unacceptably high rates. Significant industry efforts and research have aimed to improve LOC-I prevention, detection, and recove…
- SKYbrary (Eurocontrol) 2024 · SKYbrary article
Loss of Control In-Flight (LOC-I) — SKYbrary Knowledge Base
SKYbrary comprehensive knowledge-base entry on Loss of Control In-Flight — definitions, contributing factors, accident case studies (Air France 447, Colgan 3407), and prevention strategies.
- NTSB Aircraft Accident Reports 2022 · Accident report
Loss of Control on Takeoff in Icing Conditions — Citation 560XL
Cessna Citation 560XL fatal takeoff icing accident, March 2018. Investigation of a Citation 560XL loss-of-control takeoff accident in icing conditions.
- Semantic Scholar 2021 · Article (Aviation)
ANALYSIS OF GENERAL AVIATION FIXED-WING AIRCRAFT ACCIDENTS INVOLVING INFLIGHT LOSS OF CONTROL USING A STATE-BASED APPROACH
Inflight loss of control (LOC-I) is a significant cause of General Aviation (GA) fixed-wing aircraft accidents. The United States National Transportation Safety Board’s database provides a rich source…
- NASA NTRS 2021 · Presentation
Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
Abstract—We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.
- NASA NTRS 2021 · Conference Paper
Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.
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