# NTSB CEN26LA002: Champion 7GC, N621E, Haskell, OK, October 1, 2025 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Class 4 · Limited · Final report - Date: October 1, 2025, 12:45 local (17:45 UTC) - Place: Haskell, OK · Grass strip at 2K9. - Coordinates: 35.833132, -95.667165 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=35.8331&lon=-95.6672&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: Minor injuries - Injuries: 1 minor - Status: Completed, report October 30, 2025 - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Central Region - Parties: FAA Will Rogers FSDO - NTSB case key (mKey): 201769 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN26LA002 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/201769/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=201769 - Page: https://openairdocs.org/ntsb/CEN26LA002 ## Probable cause The pilot’s excessive braking during the landing roll, which resulted in a nose over. Contributing to the accident was the pilot’s lack of experience with the recently installed brakes and tundra tires. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Champion 7GC, 5 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=21101N2), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Action: incorrect action performance](https://openairdocs.org/ntsb-findings/02041015): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Champion 7GC, 1 case](https://openairdocs.org/ntsb-findings/02041015/cases.md?model=21101N2), [All aircraft, 1,386 cases](https://openairdocs.org/ntsb-findings/02041015/cases.md) - [Experience/qualifications: total experience w/ equipment](https://openairdocs.org/ntsb-findings/02031025): Personnel issues › Experience/knowledge · Pilot (probable cause); cases with it: [Champion 7GC, 1 case](https://openairdocs.org/ntsb-findings/02031025/cases.md?model=21101N2), [All aircraft, 269 cases](https://openairdocs.org/ntsb-findings/02031025/cases.md) - [Attention/monitoring: task monitoring/vigilance](https://openairdocs.org/ntsb-findings/02021520): Personnel issues › Psychological · Pilot (probable cause); cases with it: [Champion 7GC, 1 case](https://openairdocs.org/ntsb-findings/02021520/cases.md?model=21101N2), [All aircraft, 330 cases](https://openairdocs.org/ntsb-findings/02021520/cases.md) - [Landing gear system: brake](https://openairdocs.org/ntsb-findings/01023242): Aircraft › Aircraft systems · Incorrect use/operation (probable cause); cases with it: [Champion 7GC, 1 case](https://openairdocs.org/ntsb-findings/01023242/cases.md?model=21101N2), [All aircraft, 297 cases](https://openairdocs.org/ntsb-findings/01023242/cases.md) - [Landing gear system](https://openairdocs.org/ntsb-findings/01023200): Aircraft › Aircraft systems · Incorrect use/operation (probable cause); cases with it: [Champion 7GC, 1 case](https://openairdocs.org/ntsb-findings/01023200/cases.md?model=21101N2), [All aircraft, 113 cases](https://openairdocs.org/ntsb-findings/01023200/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Miscellaneous/other](https://openairdocs.org/ntsb-events/900); cases with it: [Champion 7GC, 1 case](https://openairdocs.org/ntsb-events/900/sequence.md?model=21101N2), [All aircraft, 1,556 cases](https://openairdocs.org/ntsb-events/900/sequence.md) - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Champion 7GC, 5 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=21101N2), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Champion 7GC, 2 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=21101N2), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot reported that during the landing roll on the dry grass strip, he was making corrections with the brakes and the airplane nosed over, coming to rest inverted. The pilot assumed that he was “a bit too aggressive” with the brakes. The airplane sustained substantial damage to the right wing strut and the rudder. The pilot reported there were no preimpact mechanical malfunctions or failures with the airframe or the engine that would have precluded normal operation. The pilot further reported that the accident could have been prevented by “less or no excessive braking” during the landing roll. About 25 days (9.3 hours) before the accident, the airframe was modified with different landing gear legs, wheels, and brakes. Additionally, tundra tires were installed. The pilot reported that he thought he had become familiar with the recent modifications, but the nose over revealed that he probably wasn’t as familiar with the braking capability of the tundra tires as he thought he was. According to FAA Advisory Circular Systems and Equipment Guide for Certification of Part 23 Airplanes and Airships 23-17C, tundra tire installations on airplanes may reduce brake effectiveness during a braked landing and may result in an increased tendency to nose over during landing. The Airframes Alaska Installation Instructions and Instructions for Continued Airworthiness for Alaskan Bushwheel Tundra Tires ABI-Tire-ICA discusses post-installation testing and states: Always stay within the aircraft manufacturer’s limits. When your tundra tire installation is complete and inspected, and the brakes are safe, verify the function, ability, and adequacy of the whole system by conducting ground and air practice/comparison test runs at a safe area/altitude at your gross weight. Make note of any operational differences and include these in your flight planning, decision making, and operating techniques. ## Aircraft - Registration: [N621E](https://openairdocs.org/aircraft/N621E), registered now, S/N 7-GC-46 (OpenAirDocs) - Reported make and model: CHAMPION 7GC - Registry model: [Champion 7GC](https://openairdocs.org/model/champion-7gc) (registry code 21101N2) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 7-GC-46 - Year built: 1959 - Airframe hours: 2150 - Engines: Lycoming Engines O-320-A2B 150 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Flight School Tulsa LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 6, 2025, 9.3 hours before - Departed: HRO, Harrison, AR - Destination: 2K9, Haskell, OK - Airport: 2K9, Haskell, runway 17/35, 3,710 × 30 ft, grass/turf - Equipment: Electronic flight bag or handheld device, ADS-B, Handheld GPS ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 66; injuries: minor; sport pilot, remote, flight instructor, airline transport; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review September 2, 2024; seat: front; restraint: 3-point; flight hours: 4,550 total, 128 in this make and model, 3,800 as pilot in command, 47 in the last 90 days, 29 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 82 °F, dew point 57 °F - Altimeter: 30.09 inHg - Observed at: KOKM, 17 nm away - METAR: KOKM 011735Z AUTO 00000KT 10SM CLR 28/14 A3009 RMK AO2 T02840144 ## 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 20251001016759A](https://openairdocs.org/incident/20251001016759A), Oct 1, 2025: Champion 7GC, Haskell, OK, Substantial damage. On 10/01/2025 at approximately 12:45 p.m. the aircraft was returning from harrison, ar to make a full-stop landing at Haskell, OK 2K9 Haskell Airport; being… ## Docket (7 files) The files NTSB released with the investigation on November 4, 2025, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=201769. 125 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 10 pages, 1.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19382743&FileExtension=pdf&FileName=CEN26LA002%20NTSB%20Form%206120_1_Redacted-Rel.pdf - Memorandum for record a�� telephone interview, pilot (item 2, PDF, 1 page, 94 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19382771&FileExtension=pdf&FileName=Duty%20Officer%20-%20Pilot%20ROC_Redacted-Rel.pdf - Investigation photographs (item 3, PDF, 5 pages, 936 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19382878&FileExtension=pdf&FileName=Investigation%20Photographs-Rel.pdf - N621E - recent maintenance records (item 4, PDF, 3 pages, 80.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19386875&FileExtension=pdf&FileName=Recent%20Maintenance%20Records_Redacted-Rel.pdf - N621E - current weight and balance sheet (item 5, PDF, 1 page, 40.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19382524&FileExtension=pdf&FileName=N621E%20Weight%20and%20Balance%20Sheet_Redacted-Rel.pdf - Federal aviation administration - advisory circular systems and equipment guide for certification of part 23 airplanes and airships 23-17C excerpt (item 6, PDF, 3 pages, 923 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19382761&FileExtension=pdf&FileName=FAA%20AC%2023-17C%20Excerpt_Redacted-Rel.pdf - Airframes Alaska - installation instructions and instructions for continued airworthiness for alaskan bushwheel tundra tires abi-tire-ica excerpt (item 7, PDF, 2 pages, 213 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19382350&FileExtension=pdf&FileName=Airframes%20Alaska%20-%20Installation%20Instructions%20and%20ICA%20Excerpts-Rel.pdf 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.