NTSB CAROL · Event
Event WPR11LA003
Aircraft involved
Probable cause & findings
The student pilot’s failure to maintain helicopter control during the landing flare and his subsequent interference with the flight instructor's control inputs. Contributing to the accident was the flight instructor’s inadequate supervision.
Factual narrative
On October 8, 2010, about 1030 Pacific daylight time, a Robinson R22 Beta helicopter, N2356T, landed hard and struck the tail rotor on the ground at the Scappoose Industrial Airpark (SPB), Scappoose, Oregon. Hillsboro Aviation operated the helicopter under the provisions of 14 Code of Federal Regulations Part 91 as a training flight. The certificated flight instructor (CFI) and student pilot were not injured. The helicopter sustained substantial damage to the tail rotor and left rear portion of the airframe. Visual meteorological conditions prevailed for the flight, and no flight plan had been filed. According to the CFI, he and the student pilot flew to SPB to practice pattern work, hover work, and some "set downs and pickups.” On the third set down, after the landing skids touched down, the helicopter started to spin to the right about 180 degrees. The CFI attempted to correct the maneuver; however, the student was "too stiff" on the flight controls. The student overcame the CFI and raised the collective, and the helicopter became airborne about 2 to 3 feet above the ground. The helicopter then landed hard breaking the left rear skid. Subsequently, the tail rotor struck the ground and the helicopter made one complete rotation before coming to a rest. The CFI shut down the helicopter, and both the CFI and student pilot exited the helicopter normally. The CFI reported no mechanical failures or malfunctions with the airframe or engine prior to the accident. Despite requests from investigators, the student pilot did not provide a statement. During the instructional helicopter flight, the student pilot and a certified flight instructor (CFI) were practicing pattern work, hover work, and “set downs and pickups.” On the third set down, after the landing skids touched down, the helicopter started to spin to the right about 180 degrees. The CFI said he attempted to correct the yaw; however, the student was “too stiff” on the flight controls. The student pilot overpowered the CFI on the controls and raised the collective, which resulted in the helicopter climbing about 2 to 3 feet above the ground. The helicopter then landed hard breaking the left rear skid. The tail rotor subsequently struck the ground, and the helicopter made one complete rotation before coming to a rest. The CFI reported no mechanical failures or malfunctions with the airframe or engine prior to the accident. Despite requests from investigators, the student pilot did not provide a statement. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).
- C Personnel issues-Task performance-Use of equip/info-Aircraft control-Student pilot - C
- C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Yaw control-Not attained/maintained - C
- F Personnel issues-Psychological-Attention/monitoring-Task monitoring/vigilance-Instructor/check pilot - F
- C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-(general)-Incorrect use/operation - C
- C Personnel issues-Task performance-Use of equip/info-Use of equip/system-Student pilot - C
Verbatim from NTSB's published report. Source file
NTSB_2010_WPR11LA003.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.
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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
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- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Mathematical Model on the Temporal Dynamics of Aviation Competitive Pricing
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- 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 ↗