NTSB CAROL · Event
Event IAD98LA057
Registry · N8045H
FAA Aircraft Registry record.
Make / Model
HUGHES TH-55
TCDS
4H12 · SCHWEIZER RSG LLC
Seats / Engines
2 seats · 1 engine
ADS-B equipped
Yes — Mode-S AAF3C8
Registrant of record
A AND J AVIATION SERVICES LLC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
Failure of the pilot to maintain rotor rpm during practice autorotation, and the flight instructor's inadequate supervision.
Factual narrative
On May 11, 1998, at 2030 eastern daylight time, N8045H, a Hughes 269-A, was substantially damaged when it landed hard during a practice autorotation at the Maxon Field, Alexandria Bay, New York. Visual meteorological conditions prevailed and a flight plan was not filed. The certificated flight instructor and commercial pilot were not injured. The local instructional flight was conducted under 14 CFR Part 91. According to the commercial pilot, the purpose of the flight was to practice touchdown autorotations toward attaining his instructor certificate. He said that during the autorotation, the helicopter touched down hard on the left main landing gear. The left skid then separated and the helicopter rolled over to the left. The pilot said there was no discussion how the autorotation should be done. He said, "...entered auto at 60 mph, 1,000 feet. [I] allowed the airspeed to drop to 55 without maintaining rotor rpm. Flare was entered at 50 ft...helicopter fell through possibly to excessive flare resulting in too much of a vertical drop." The pilot said there was no mechanical malfunction with the helicopter, and the accident could have been prevented if the instructor had taken the controls. He said the instructor was a relatively new instructor. He also stated that the flight instructor might have been hesitant to correct a more experienced pilot. The pilot reported over 3,420 hours of rotorcraft flight experience, including 63 hours in make and model. The flight instructor reported over 440 hours of rotorcraft flight experience, including 41 hours in make and model. Several attempts were made to contact the instructor including mailing the pilot/operator report. The report was returned to the NTSB with a note that he was no longer at the address on file with the FAA. There was no forwarding address available. The pilot was receiving instruction from a flight instructor for the purpose of practicing touchdown autorotations towards attaining his instructor certificate. The pilot said that during the autorotation, the helicopter touched down hard on the left main landing gear. The left skid then separated and the helicopter rolled over to the left. The pilot said there was no mechanical malfunction with the helicopter, and the accident could have been prevented if the flight instructor had taken the controls. He said the instructor was a relatively new instructor. The pilot also stated that the flight instructor might have been hesitant to correct a more experienced pilot. The instructor reported over 440 hours of rotorcraft flight experience including, 41 hours in make and model. The pilot reported over 3,420 hours of rotorcraft flight experience, including 63 hours in make and model. Several attempts were made to contact the instructor without success. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1998_IAD98LA057.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Beyond the agency record
Search this event elsewhere.
Pre-filled searches into the sources where news + community discussion of aviation events lives. External sources are reported, not agency. Treat them as signal that something happened, not as fact about what happened.
Entity-clustered aviation events in the press — last 24 hr + 30-day archive.
Official agency record + docket.
Investigative docket: factual reports, photos, transcripts.
Long-running aviation incident database (Flight Safety Foundation).
Community NTSB synthesis blog — often has photos and witness reports.
Gold-standard aviation incident blog.
Aviation industry news search.
GA pilot forum — informed but rumor-prone.
GA pilot subreddit search.
Tail-number page — flight history (free tier limited).
AOPA Air Safety Institute search.
Mainstream press coverage. Recent events only.
Privacy-preserving news search.
External links open in a new tab. We don't ingest their content; we deep-link search queries.
Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (icing). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- 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…
- 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…
- 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…
- 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…
- NASA NTRS 2024 · Presentation
NASA Icing Update – Oct 2024
This presentation provides a status update on select NASA icing research activities for the SAE AC-9C Icing Technical Committee Meeting on Oct 21, 2024.
Browse the full corpus — academia portal ↗