NTSB CAROL · Event
Event ANC06LA028
Registry · N203DH
FAA Aircraft Registry record.
Make / Model
BEECH B200
Seats / Engines
11 seats · 2 engines
ADS-B equipped
Yes — Mode-S A19D7B
Registrant of record
GUARDIAN FLIGHT LLC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The flight instructor's delayed remedial action while conducting hover practice with a student pilot, which resulted in the helicopter contacting the ground and rolling over. A factor contributing to the accident was an inadvertent dynamic roll over.
Factual narrative
On March 23, 2006, about 0845 Hawaiian standard time, a skid-equipped Robinson R-22B helicopter, N203DH, sustained substantial damage when it rolled over while hovering at the Kona International Airport, Kailua-Kona, Hawaii. The helicopter was being operated as a visual flight rules (VFR) local area instructional flight under Title 14, CFR Part 91, when the accident occurred. The helicopter was operated by Hawaii Pacific Aviation Inc., doing business as Mauna Loa Helicopters, Kailua. The certificated flight instructor and the student pilot were not injured. Visual meteorological conditions prevailed. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on March 23, the owner of the company reported that the student pilot was practicing hovering with the flight instructor aboard. The instructor told the owner that the helicopter began to settle while drifting to the left. The helicopter's left skid contacted the ground, which resulted in a dynamic roll over. The helicopter rolled onto its left side, and received structural damage to the fuselage, tail boom, and main rotor blades. The student pilot had received about 3 hours of initial helicopter instruction at the time of the accident. In the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1) submitted by the pilot, Page 10 contains an optional portion titled, Operator/Owner Safety Recommendation (How could this accident have been prevented?). The flight instructor wrote, "Maintain higher hover altitude for initial hover practice," and "Intervene earlier to deviations." The certificated flight instructor was providing hovering instruction to a student in a skid-equipped helicopter under Title 14, CFR Part 91. The helicopter began to settle while drifting to the left, and the left skid contacted the ground, which resulted in a dynamic roll over. The helicopter rolled onto its left side and received structural damage to the fuselage, tail boom, and main rotor blades. The student pilot had received about 3 hours of initial helicopter instruction at the time of the accident. In his written statement to the NTSB, the flight instructor noted that the accident could have been prevented by maintaining a higher hover altitude, and by earlier intervention to the student's deviations. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2006_ANC06LA028.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 ↗