# NTSB CHI00LA060: Robinson R-22B, N4047C, East Troy, WI, January 22, 2000 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: January 22, 2000, 09:45 local (15:45 UTC) - Place: East Troy, WI - Coordinates: 42.779941, -88.38945 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=42.7799&lon=-88.3894&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor, 1 uninjured - Status: Completed, report March 2, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 48564 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI00LA060 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/48564/pdf - Page: https://openairdocs.org/ntsb/CHI00LA060 ## Probable cause The proper alignment not being maintained by the dual student during an attempted running takeoff and the inadequate supervision of the pilot-in-command (CFI). ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, takeoff - running takeoff - attempted, dual student - proper alignment - not maintained, dual student (cause) - supervision - inadequate, pilot in command(cfi) (cause) - In flight collision with terrain/water, descent - uncontrolled ## Analysis According to the CFI's written statement, they were practicing a running takeoff on runway 18 and after traversing approximately ten feet of the takeoff run the student applied right pedal input. The CFI stated that he tried to overcome the student's right pedal input by depressing the left pedal input and verbally commanding the student to do the same. The CFI reported that he was unable to counteract the students control input and the aircraft yawed to the right. The left skid of the helicopter impacted the terrain, the aircraft rolled onto its left side and slid 15-feet before coming to rest. ## Factual narrative On January 22, 2000, at 0945 central standard time, a Robinson R-22B, N4047C, operated by WW Helicopters LLC, of East Troy, Wisconsin, sustained substantial damage during an in-flight collision with terrain following a loss of control during takeoff from runway 18 (1,900 feet by 150 feet, snow-covered/grass) at the East Troy Municipal Airport, East Troy, Wisconsin. Visual meteorological conditions prevailed at the time of the accident. The instructional flight was conducted under the provisions of 14 CFR Part 91 and was not on a flight plan. The certified flight instructor (CFI) received minor injuries. The dual student reported no injuries. The local flight was departing at the time of the accident. According to the CFI's written statement, they were practicing a running takeoff on runway 18 and after traversing approximately ten feet of the takeoff run the student applied right pedal input. The CFI stated that he tried to overcome the student's right pedal input by depressing the left pedal and verbally commanding the student to do the same. The CFI reported that he was unable to counteract the students control input and the aircraft yawed to the right. The left skid of the helicopter impacted the terrain, the aircraft rolled onto its left side, and slid 15-feet before coming to rest. ## Aircraft - Registration: N4047C (not matched to a registry record) - Reported make and model: Robinson R-22B - Category: Helicopter - Serial number: 1690 - Airframe hours: 2624 - Engines: Lycoming O-320-B2C 160 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Ww Helicopters, LLC - Registered owner: Lloyd Aviation Inc - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, December 20, 1999, 41 hours before - Departed: 57C - Airport: 57C, East Troy Municipal Arpt, runway 18, 1,900 × 150 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 41; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 3,350 total, 1,800 in this make and model, 3,260 as pilot in command, 120 in the last 90 days, 35 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 160° at 8 knots - Visibility: 4 statute miles - Lowest ceiling: 4,300 ft overcast - Temperature: 18 °F, dew point 16 °F - Altimeter: 29.00 inHg - Observed at: UES, 16 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 20000122041379A](https://openairdocs.org/incident/20000122041379A), Jan 22, 2000: Robsin R22BETA, East Troy, WI, Substantial damage. (.19) On January 22, 2000, at 0945 central standard time, a Robinson R-22B, N4047C, operated by ww helicopters LLC, of East Troy, Wisconsin, sustained… 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.