# NTSB BFO95LA031: Robinson R-22B, N2346P, Frederick, MD, March 11, 1995 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: March 11, 1995, 07:30 local (12:30 UTC) - Place: Frederick, MD - Coordinates: 39.420986, -77.409004 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=39.4210&lon=-77.4090&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report October 19, 1995 - Report: Approved by Office Director - NTSB case key (mKey): 9029 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=BFO95LA031 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/9029/pdf - Page: https://openairdocs.org/ntsb/BFO95LA031 ## Probable cause the helicopter pilot's inadequate control of the aircraft during the attempted takeoff. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Roll over, takeoff - landing gear,skid assembly - snagged - aircraft control - not maintained, pilot in command (cause) ## Analysis THE PILOT REPORTED HE WAS ATTEMPTING A TAKEOFF FROM A DOLLY WHEN THE ACCIDENT OCCURRED. ACCORDING TO THE FAA INSPECTOR THE PILOT REPORTED THAT DURING INITIAL LIFTOFF, WHEN HE APPLIED THE COLLECTIVE AND RAISED THE HELICOPTER TO HOVER, THE ROTOR RPM BLED OFF AND THE HELICOPTER SETTLED BACK ON THE DOLLY. HE FURTHER STATED THAT WHEN HE TRIED TO LIFT OFF AGAIN, THE HELICOPTER ROLLED OVER. THE FAA EXAMINED THE AIRCRAFT AFTER THE ACCIDENT AND IT WAS REVEALED THAT THE SKID HOOKED ONTO THE DOLLY AS THE PILOT APPLIED POWER. THERE WAS NO EVIDENCE OF MECHANICAL MALFUNCTION NOTED. ## Factual narrative On March 11, 1995, at 0730 eastern standard time, N2346P, a Robinson R-22B helicopter, owned and operated by Advanced Helicopter Concepts Inc. of Frederick, Maryland, crashed during takeoff at Frederick Municipal Airport, Frederick, Maryland. Visual meteorological conditions prevailed and a flight plan was not filed. The certificated private pilot, the sole occupant, was not injured. The helicopter sustained substantial damage. The local, personal flight was conducted under 14 CFR 91. According to an FAA Aviation Safety Inspector, the pilot was attempting to liftoff from a dolly when the left skid hooked onto the dolly and rolled over. The pilot reported to the FAA that he completed his preflight inspection and engine run-up check successfully. The pilot stated the helicopter lifted off once, but there was a loss of rotor RPM and the helicopter settled back onto the platform. When the pilot added power to attempt a second takeoff, the helicopter skid was hooked on the dolly and the helicopter rolled onto the asphalt field. An FAA Aviation Safety Inspector examined the helicopter at the accident site. The examination revealed that the main rotor blades contacted the asphalt field separating sections of the blades. The examination did not reveal evidence of preimpact mechanical malfunction. ## Aircraft - Registration: [N2346P](https://openairdocs.org/deregistered/N2346P-2013-04-01), registration cancelled 2013-04-01, S/N 2227, built 1992 (OpenAirDocs) - Reported make and model: ROBINSON R-22B - Registry model: [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta) (registry code 7640110) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Helicopter - Serial number: 2223 - Engines: LYCOMING O-320-B2C 160 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Advanced Helicopter Concepts - Airworthiness certificate: Standard, Normal - Departed: FDK - Destination: HGR - Airport: FDK, Frederick Municipal ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 44; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 330 total, 32 in this make and model, 30 in the last 90 days, 10 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 20 statute miles - Lowest ceiling: none - Temperature: 34 °F, dew point 18 °F - Altimeter: 30.00 inHg - Observed at: HGR, 23 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 19950311003629A](https://openairdocs.org/incident/19950311003629A), Mar 11, 1995: Robsin R22BETA, Frederick, MD, Substantial damage. On lift off airc raft contacted dolly and rolled over onto its side. (.4)the pilot reported he was attempting a takeoff from a dolly when the accident… 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.