# NTSB DFW06CA213: Robinson R22, N468SH, Skiatook, OK, September 24, 2006 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 24, 2006, 14:40 local (19:40 UTC) - Place: Skiatook, OK - Coordinates: 36.359462, -96.030776 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=36.3595&lon=-96.0308&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report December 28, 2006 - Report: Approved by Office Director - Parties: Oklahoma City, Oklahoma - NTSB case key (mKey): 64581 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DFW06CA213 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/64581/pdf - Page: https://openairdocs.org/ntsb/DFW06CA213 ## Probable cause The pilot's failure to maintain control of the helicopter following an encounter with dynamic rollover. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, hover - aircraft control - not maintained, pilot in command (cause) - dynamic rollover - encountered, pilot in command (cause) - In flight collision with terrain/water, descent - uncontrolled - terrain condition - ground ## Analysis The 1,365 hour single engine airplane rated pilot, who had accumulated 33 hours of flight instruction in a helicopter lost control of the helicopter while attempting to take off during his first solo flight. The pilot was attempting to take off on the parallel taxiway to runway 35 on a heading of 350 degrees when he lost control of the aircraft as the helicopter lifted off the ground. The pilot reported in the Pilot/Operator Aircraft Accident/Incident Report (NTSB Form 6120.1), that the "helicopter became airborne suddenly with much less collective input than I expected." The helicopter began to roll to the right and the pilot then overcorrected to the left with cyclic input and lowered the collective. The helicopter's left skid made contact with the ground first and the helicopter entered a dynamic roll to the left until the main rotor contacted the ground, and the helicopter came to rest on its left side. Prior to the solo flight, the pilot and his instructor discussed the changes in the flight characteristics concerning single occupancy in the helicopter and the procedures for the flight. The pilot was not injured. Weather reported by the pilot was overcast skies, 10 miles visibility with winds from 340 degrees at 10 knots, and a density altitude of approximately 948 feet. ## Factual narrative The 1,365 hour single engine airplane rated pilot, who had accumulated 33 hours of flight instruction in a helicopter lost control of the helicopter while attempting to takeoff during his first solo flight. The pilot was attempting to takeoff on the parallel taxiway to runway 35 on a heading of 350 degrees when he lost control of the aircraft as the helicopter lifted off the ground. The pilot reported in the Pilot/Operator Aircraft Accident/Incident Report (NTSB Form 6120.1), that the "helicopter became airborne suddenly with much less collective input than I expected." The helicopter began to roll to the right and the pilot then overcorrected to the left with cyclic input and lowered the collective. The helicopter's left skid made contact with the ground first and the helicopter entered a dynamic roll to the left until the main rotor contacted the ground, and the helicopter came to rest on its left side. Prior to the solo flight, the pilot and his instructor discussed the changes in the flight characteristics concerning single occupancy in the helicopter and the procedures for the flight. The pilot was not injured. Weather reported by the pilot was overcast skies, 10 miles visibility with winds from 340 degrees at 10 knots, and a density altitude of approximately 948 feet. ## Aircraft - Registration: [N468SH](https://openairdocs.org/deregistered/N468SH-2008-12-04), registration cancelled 2008-12-04, S/N 4042, built 2006 (OpenAirDocs) - Reported make and model: Robinson R22 - Registry model: [Robinson Helicopter R22](https://openairdocs.org/model/robinson-helicopter-r22) (registry code 7640102) (OpenAirDocs) - Registry engine: [Lycoming O-360-J2A](https://openairdocs.org/engine/lycoming-o-360-j2a) (registry code 42314, reciprocating) (OpenAirDocs) - Category: Helicopter - Serial number: 4042 - Airframe hours: 456 - Engines: Lycoming 0-360-J2A 145 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Silver State Helicopters LLC., doing business as Silver State Helicopters LLC - Registered owner: Silver State Helicopters - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, September 1, 2006 - Departed: 2F6, Skiatook, OK - Destination: 2F6, Skiatook, OK - Airport: K2F6, Skiatook ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 51; injuries: none; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review May 1, 2006; seat: right; flight hours: 1,365 total, 33 in this make and model, 1,283 as pilot in command, 27 in the last 90 days, 9 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 340° at 10 knots - Visibility: 10 statute miles - Lowest ceiling: 2,900 ft overcast - Temperature: 64 °F, dew point 55 °F - Altimeter: 30.17 inHg - Observed at: KTUL, 12 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20060924018909A](https://openairdocs.org/incident/20060924018909A), Sep 24, 2006: Robsin R22, Skiatook, OK, Substantial damage. (-23) On September 24, at 1415 hours the pilot [privacy data omitted], a student rotorcraft pilot, attempted his first solo flight at Skiatook airport (2F6).… From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.