NTSB CAROL · Event
Event LAX98LA160
Aircraft involved
Probable cause & findings
The student pilot's failure to maintain adequate rotor rpm, and the flight instructor's inadequate supervision of the flight.
Factual narrative
On May 16, 1998, at 1048 hours Pacific daylight time, a Robinson R22B, N2332G, impacted the terrain and rolled over at the Reid-Hillview Airport in San Jose, California. The aircraft sustained substantial damage and the certified flight instructor and dual student were not injured. Visual meteorological conditions prevailed and no flight plan was filed. The local instructional flight originated at 1010. The certified flight instructor reported that he and the commercial rated pilot were working on traffic patterns and had made several practice landings to a 10-degree slope. At the time of the accident, the student was on the controls. She reported that as she set the helicopter down, "it didn't feel right," and she attempted to abort the landing by pulling in full collective and applying aft cyclic. The helicopter became airborne and the main rotor rpm decreased to the point where the low rotor rpm horn and light were activated. The flight instructor reported that he lowered the collective, rolled on the throttle, and neutralized the pedals. The instructor reported that the rotor rpm was recovered to approximately 92 percent. He then applied aft cyclic and lifted the collective to cushion the landing. The helicopter landed hard on the forward portion of the left skid. The skid tip impacted the berm and the helicopter rolled onto its left side. The pilot reported no prior mechanical malfunctions with the aircraft. The flight instructor and the commercial rated pilot were practicing slope landings. The student stated that as she set the helicopter down it didn't feel right, and she attempted to abort the landing by pulling in full collective. The helicopter became airborne and the main rotor rpm decreased to the point where the low rotor rpm horn and light were activated. The flight instructor reported that he took the controls and recovered the rotor rpm to 92 percent. He attempted to cushion the landing but the helicopter landed hard on the forward portion of the left skid. The left skid tip impacted the berm and the helicopter rolled onto its left side. There was no report of prior mechanical malfunctions. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1998_LAX98LA160.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 (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 ↗