IAD97LA106
1997-08-06 · WILLIMANTIC, Connecticut, United States · None · 1 aircraft · Status: Completed
Airport IJD
N717GT has since been reassigned. It is now registered to a different aircraft (717GT LLC TURBINE LEGEND, built 2016), which was not involved in this event.
Aircraft involved
Probable cause & findings
The student pilot misunderstood the flight instructor's instructions and reduced the engine power to idle, and the Certificated Flight Instructor's delayed remedial action.
Factual narrative
On August 6, 1997, about 1220 eastern standard time, a Robinson R-22 Beta, N717GT, was substantially damaged during a hard landing at the Windham Airport, Willimantic, Connecticut. The certificated flight instructor and the pre-solo foreign student were uninjured. Visual meteorological conditions prevailed and no flight plan was filed for the instructional flight conducted under 14 CFR 91. The flight originated from the Ellington Airport, Ellington, Connecticut, about 1138. The flight instructor stated that they flew to Windham Airport to practice approaches and hovering. Upon completion of their maneuvers and while hovering at 10 feet, the instructor asked the foreign student to return to Ellington Airport to practice auto rotations. According to the instructor, the student moved the throttle to idle and the helicopter impacted the ground before he could recover control of the helicopter. The student pilot was a foreign national with limited ability to speak and understand English. His previous two flights were with another instructor, who had the student pilot practice hovering auto rotations. When interviewed after the accident, the student stated that he mistakenly thought the new instructor requested an auto rotation from their present location. The student adjusted the throttle and it slipped to the idle position. Neither the instructor nor the student reported mechanical problems with the helicopter. The student pilot flew his first two flights with another instructor. After practicing various maneuvers and while hovering at about 10 feet AGL with a new instructor, the student pilot was asked to return to their home airport to practice auto rotations. The student pilot turned the throttle to idle and the helicopter impacted the ground before the instructor could recover. The student pilot stated that he mistakenly thought the instructor requested an auto rotation from their present location, as he had done on his previous flights. No mechanical problems were reported by the instructor or the student. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1997_IAD97LA106.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Search this event elsewhere
External sources are reported, not agency: signal that something happened, not fact about what happened.
- TallyAero Live Wire Aviation press
- NTSB CAROL Agency ↗
- NTSB Docket Agency ↗
- Aviation Safety Network Aviation press ↗
- Kathryn's Report Aviation press ↗
- Aviation Herald Aviation press ↗
- AVweb Aviation press ↗
- Pilots of America Community ↗
- Reddit /r/flying Community ↗
- FlightAware Aviation press ↗
- AOPA accident database Aviation press ↗
- Google News News ↗
- DuckDuckGo News ↗
Related research
Matched on aircraft type or causal vocabulary (icing). All research papers
- arXiv 2026 · arXiv preprint Enabling Beyond-Visual-Line-of-Sight Drones Operation over Open RAN 5G Networks with Slicing
Among the foretold claims of the transition from 5G to 6G, Beyond-Visual-Line-of-Sight (BVLoS) drone operation has emerged as a prominent Internet-of-Robots enabler.
- NASA NTRS 2026 · Contractor Report (CR) Icing Physics Studies Using the 3D SIDRM Test Article: 2023 Icing Tests Analysis
In-flight icing is an important safety issue and is a factor that affects aircraft design and performance. Newer regulations are driving a need for improvements in airframe and engine icing simulation…
- arXiv 2025 · arXiv preprint Multi-Agent Deep Reinforcement Learning for UAV-Assisted 5G Network Slicing: A Comparative Study of MAPPO, MADDPG, and MADQN
The growing demand for robust, scalable wireless networks in the 5G-and-beyond era has led to the deployment of Unmanned Aerial Vehicles (UAVs) as mobile base stations to enhance coverage in dense urb…
- NASA NTRS 2025 · Presentation NASA Icing Update – March 2025
This NASA Icing Update was prepared for presentation to the SAE International AC-9C Inflight Icing Technology Committee. This update includes the following topics: planned Rotational Icing Scaling tes…
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER) A Mathematical Model on the Temporal Dynamics of Aviation Competitive Pricing
This study investigates the competitive dynamics of airport pricing using U.S. airport data to validate the findings. It employs linear and nonlinear ordinary differential equation models to analyze t…
- arXiv 2024 · arXiv preprint An energy-stable phase-field model for droplet icing simulations
A phase-field model for three-phase flows is established by combining the Navier-Stokes (NS) and the energy equations, with the Allen-Cahn (AC) and Cahn-Hilliard (CH) equations and is demonstrated ana…