# NTSB CHI00LA099: Aeronca 11AC, N9570E, Ft. Leavenworth, KS, March 25, 2000 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: March 25, 2000, 17:30 local (23:30 UTC) - Place: Ft. Leavenworth, KS - Coordinates: 39.360908, -94.910476 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=39.3609&lon=-94.9105&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report March 2, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 51052 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI00LA099 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/51052/pdf - Page: https://openairdocs.org/ntsb/CHI00LA099 ## Probable cause (aircraft 2) the pilot of N51933 did not see and maintain clearance from N9570E. A factor associated with the accident was the pilot of N51933's restricted forward visibility during the landing due to the tailwheel configuration. An additional factor was the pilot of N51933 entered the traffic pattern on base leg and flew a short final approach which reduced his ability to look for other traffic. ## Probable cause (aircraft 1) the pilot of N51933 did not see and maintain clearance from N9570E. A factor associated with the accident was the pilot of N51933's restricted forward visibility during the landing due to the tailwheel configuration. An additional factor was the pilot of N51933 entered the traffic pattern on base leg and flew a short final approach which reduced his ability to look for other traffic. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water collision with object, landing - roll - touch-and-go - performed, pilot in command - comm/nav equipment,transceiver - not installed - planned approach - inadequate, pilot of other aircraft (contributing factor) - visual lookout - restricted, pilot of other aircraft (contributing factor) - identification of aircraft visually - not obtained, pilot of other aircraft (cause) - clearance - not maintained, pilot of other aircraft (cause) - On ground/water collision with object, landing - flare/touchdown - touch-and-go - performed, pilot of other aircraft - planned approach - inadequate, pilot in command (contributing factor) - visual lookout - restricted, pilot in command (contributing factor) - identification of aircraft visually - not obtained, pilot in command (cause) - clearance - not maintained, pilot in command (cause) ## Analysis (aircraft 2) N9570E, an Aeronca 11AC, was practicing touch and go landings on runway 15. The airplane touched down and the pilot was transitioning the airplane for takeoff when it was struck from behind by N51933, an EAA Biplane P2, which landed on the same runway. N9570E was not equipped with a radio. N51933 was equipped with a radio and the pilot reported he made position reports in the traffic pattern. Both airplanes were tailwheel equipped. The pilot of N51933 reported that he looked for other airplanes in the traffic pattern and did not see any. The pilot of N51933 reported the accident may have been prevented had he not made a short final approach and if he had entered the traffic pattern on downwind instead of on a base leg. ## Analysis (aircraft 1) N9570E, an Aeronca 11AC, was practicing touch and go landings on runway 15. The airplane touched down and the pilot was transitioning the airplane for takeoff when it was struck from behind by N51933, an EAA Biplane P2, which landed on the same runway. N9570E was not equipped with a radio. N51933 was equipped with a radio and the pilot reported he made position reports in the traffic pattern. Both airplanes were tailwheel equipped. The pilot of N51933 reported that he looked for other airplanes in the traffic pattern and did not see any. The pilot of N51933 reported the accident may have been prevented had he not made a short final approach and if he had entered the traffic pattern on downwind instead of on a base leg. ## Factual narrative (aircraft 2) See Narrative for CHI00LA099A. ## Factual narrative (aircraft 1) On March 25, 2000, at 1730 central standard time, an Aeronca 11AC, N9570E, and an EAA Biplane P2, N51933, collided on runway 15 at Sherman AFB, Ft. Leavenworth, Kansas. N9570E was being operated by a commercial pilot, who along with his passenger were not injured. N51933 was operated by a private pilot who was not injured. Both airplanes received substantial damage. Both airplanes were being operated under 14 CFR Part 91 in visual meteorological conditions without flight plans. N9570E had originally departed from Platte City, Missouri, at 1700 cst and was practicing touch and go landings at Sherman AFB. N51933 departed from St. Joseph, Missouri, around 1650 cst and was landing at Sherman AFB. The pilot of N9570E reported that he was practicing touch and go landings and was on the 4th or 5th landing when the accident occurred. He reported he had touched down and was in the process of transitioning for takeoff when the rear of his airplane was struck by N51933. He reported the airplanes were approximately 1,500 feet from the approach end of the runway when the accident occurred. The pilot of N51933 reported that he made a radio call on 126.2 when he was about 3 miles north-northeast of the airport. He reported the radio call was answered by another aircraft in the area. This aircraft informed him that runway 15 was the active runway at Sherman AFB, and that there was possibly another airplane making touch and go landings at the airport. The pilot reported he entered a left base for runway 15 at which time he made another radio call reporting his position. According to the pilot of N51933, he looked down the runway and did not see any other airplanes. He reported he turned onto final approach, made another radio call, and looked for traffic again without seeing any. The pilot of N51933 continued to report he set up for the landing, looking out the right side of the open cockpit to maintain runway alignment. He reported the airplane bounced during the landing then settled back to the runway after which time he applied light braking and pulled the throttle to idle. He reported, "Maybe about 50' later I glanced towards [the] left side saw the yellow tail of the Aeronca. I immediately gave 933 Rt. rudder and brake, it was too late, contact was made in seconds, my left lower wing rode over his Rt. horizontal stabilizer and my left wing struck his right wing." He reported that his propeller also contacted the right wing of N9570E. He estimated that his speed was about 35 miles per hour when the contact occurred. N9570E was not equipped with a radio. Both airplanes were tailwheel equipped. The pilot of N51933 recommended that the accident may have been prevented had he not made a short final approach and if he had entered the traffic pattern on downwind instead of on a base leg. ## Aircraft 1 - Registration: [N9570E](https://openairdocs.org/aircraft/N9570E), registered now, S/N 11AC1208 (OpenAirDocs) - Reported make and model: Aeronca 11AC - Registry model: [Aeronca 11AC](https://openairdocs.org/model/aeronca-11ac) (registry code 0191102) (OpenAirDocs) - Registry engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 1208 - Airframe hours: 1644 - Engines: Continental A-65 65 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Eunice E. Wamsley - Airworthiness certificate: Standard, Normal - Last inspection: Annual, July 10, 1999, 78 hours before - Departed: FLV - Destination: FLV - Airport: FLV, Sherman Aaf, runway 15, 5,905 × 100 ft, asphalt ## Aircraft 2 - Registration: [N51933](https://openairdocs.org/deregistered/N51933-2012-12-11), registration cancelled 2012-12-11, S/N 31852, built 1981 (OpenAirDocs) - Reported make and model: NEW EAA BIPLANE P2 (EAA BIPLAN) - Registry model: [New EAA BIPLANE P 2](https://openairdocs.org/model/new-eaa-biplane-p-2) (registry code 3360316) (OpenAirDocs) - Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 31852 - Airframe hours: 371 - Engines: Lycoming O-290-G 135 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Markus W. Wallner - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, November 5, 1999, 12 hours before - Departed: STJ, ST. JOSEPH, MO - Destination: FLV - Airport: FLV, Sherman Aaf, runway 15, 5,905 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot, aircraft N9570E; age 58; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 2,226 total, 120 in this make and model, 1,997 as pilot in command, 23 in the last 90 days, 8 in the last 30 days, 3 in the last 24 hours - Pilot, aircraft N51933; age 73; private; airplane ratings: single-engine land; medical: class 3, invalid medical for flight; seat: front; flight hours: 983 total, 148 in this make and model, 983 as pilot in command, 7 in the last 90 days, 4 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 63 °F, dew point 36 °F - Altimeter: 30.00 inHg - Observed at: MCI, 11 nm away ## 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 20000325004629A](https://openairdocs.org/incident/20000325004629A), Mar 25, 2000: Bbavia 11AC, Fort Leavenwort, KS, No damage. (-23) N9570E was making a series of touch and go landings on runway 15 at fort leavenworth, Kansas (flv). The airplane touched down and just as the pilot, Mr.… - [Accident 20000325013112A](https://openairdocs.org/incident/20000325013112A), Mar 25, 2000: Amtr EAABIPLANEP2, Fort Leavenwort, KS, No damage. (-23) N51933 departed st. joseph, Missouri (stj), enroute to fort leavenworth, Kansas (flv). Approximately three miles north of flv, the pilot transmitted his… 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.