# NTSB CHI98LA297: Cessna 180, N111WF, Oshkosh, WI, August 1, 1998 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: August 1, 1998, 18:40 local (23:40 UTC) - Place: Oshkosh, WI - Coordinates: 44.060153, -88.54029 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=44.0602&lon=-88.5403&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report July 2, 1999 - Report: Approved by Office Director - NTSB case key (mKey): 43631 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI98LA297 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/43631/pdf - Page: https://openairdocs.org/ntsb/CHI98LA297 ## Probable cause (aircraft 2) the pilot of the other airplane did not maintain proper clearance. ## Probable cause (aircraft 1) The pilot failed to maintain clearance from the other airplane while taxiing. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Collision between aircraft (other than midair), taxi - clearance - not maintained, pilot in command (cause) - Collision between aircraft (other than midair), taxi - clearance - not maintained, pilot of other aircraft (cause) ## Analysis (aircraft 2) The pilot of the other airplane was taxiing for departure on a north-south taxiway for a departure from runway 18R. He reported that the ATIS advised all traffic to watch the flagmen for ATC instructions. The pilot reported that he was watching the flagman as instructed. The pilot reported, 'The flagman gave me a signal to stop as I approached the intersection, and then changed to the right turn signal. I started my right turn. The flagman gave me no indication that there was an aircraft in my path, or that I should do anything other than complete the turn.' He reported that he was about halfway through the turn when his propeller struck the right wingtip of the RV-6. He reported, 'I was confident that this area was clear because the flagman, with a clear view, directed me to make the turn.' The pilot of the RV-6 was not aware of the conflict until the Cessna's propeller hit the right wing and aileron of his airplane. ## Analysis (aircraft 1) The pilot was taxiing for departure on a north-south taxiway for a departure from runway 18R. He reported that the ATIS advised all traffic to watch the flagmen for ATC instructions. The pilot reported that he was watching the flagman as instructed. The pilot reported, 'The flagman gave me a signal to stop as I approached the intersection, and then changed to the right turn signal. I started my right turn. The flagman gave me no indication that there was an aircraft in my path, or that I should do anything other than complete the turn.' He reported that he was about halfway through the turn when his propeller struck the right wingtip of the RV-6. He reported, 'I was confident that this area was clear because the flagman, with a clear view, directed me to make the turn.' ## Factual narrative (aircraft 2) See Narrative for accident CHI98LA297A. ## Factual narrative (aircraft 1) On August 1, 1998, at 1840 central daylight time, a Cessna 180, N111WF, operated by Fletcher Aviation Inc., taxiied into the right wing of an experimental Preece VANS RV-6, N122BP. The RV-6 was number three holding short for takeoff from runway 18 at Oshkosh Municipal Airport, Oshkosh, Wisconsin. The Cessna 180 was turning on the taxiway when its propeller impacted the right wing of the RV-6. Visual meteorological conditions prevailed at the time of the accident. The pilot was taxiing for departure on a north-south taxiway for a departure from runway 18R. He reported that the ATIS advised all traffic to watch the flagmen for ATC instructions. He reported that he saw an RV-6 taxi across the front of his airplane when he was about 400 to 500 feet from the intersection. The pilot reported that he was watching the flagman as instructed. The pilot reported, "The flagman have me a signal to stop as I approached the intersection, and then changed to the right turn signal. I started my right turn. The flagman game me no indication that there was an aircraft in my path, or that I should do anything other than complete the turn." He reported that he was about halfway through the turn when his propeller struck the right wingtip of the RV-6. He reported, "I was confident that this area was clear because the flagman, with a clear view, directed me to make the turn." The pilot reported that the Cessna 180, a tail wheel airplane, had a blind spot directly in front and to the right when piloting the airplane from the left seat. The pilot of the RV-6 reported that he was not aware of the conflict until the Cessna's propeller hit the right wing and aileron of his airplane. ## Aircraft 1 - Registration: [N111WF](https://openairdocs.org/aircraft/N111WF), registered now, S/N 31243, built 1954 (OpenAirDocs) - Reported make and model: Cessna 180 - Registry model: [Cessna 180](https://openairdocs.org/model/cessna-180) (registry code 2072602) (OpenAirDocs) - Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 31243 - Airframe hours: 4714 - Engines: Continental O-470-U 225 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Fletcher Aviation Inc. - Airworthiness certificate: Standard, Normal - Last inspection: Annual, July 14, 1997, 40 hours before - Destination: 9WIG, SPRING PRAIRIE, WI - Airport: OSH, Oshkosh Whitman Regional ## Aircraft 2 - Registration: [N122BP](https://openairdocs.org/aircraft/N122BP), registered now, S/N 22912, built 1997 (OpenAirDocs) - Reported make and model: Preece VANS RV-6 - Registry model: [Ross Herbertw VANS RV-6](https://openairdocs.org/model/ross-herbertw-vans-rv-6) (registry code 0560416) (OpenAirDocs) - Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 22912 - Airframe hours: 40 - Engines: Lycoming O-360 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Bill Preece - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, February 14, 1998, 40 hours before - Destination: GRB, GREEN BAY, WI - Airport: OSH, Oshkosh Whitman Regional ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot, aircraft N111WF; age 53; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 6,000 total, 1,500 in this make and model, 5,500 as pilot in command, 50 in the last 90 days, 15 in the last 30 days, 2 in the last 24 hours - Pilot, aircraft N122BP; age 56; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 8,500 total, 40 in this make and model, 7,500 as pilot in command, 40 in the last 90 days, 20 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 79 °F, dew point 52 °F - Altimeter: 30.00 inHg - Observed at: OSH ## FAA reports on this event (2) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19980801046589A](https://openairdocs.org/incident/19980801046589A), Aug 1, 1998: Cessna 180, Oshkosh, WI, No damage. (-23) Pilot was taxiing on 18/36 parallel taxiway following ground guide instructions. Pilot made a 90 degree right turn. Due to nose high attitude of aircraft… - [Accident 19980801019169A](https://openairdocs.org/incident/19980801019169A), Aug 1, 1998: Amtr VANSRV6, Oshkosh, WI, Substantial damage. Acft was facing east on rwy P1 waiting for departure on rwy 18R and was strcuk in the right wing by the prop of taxiing aiarcraft N111WF. (-23) while holding… 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.