# NTSB CEN21LA398: Segarra Lucas JR Zenith Stoll 701, N705L, Grantsburg, WI, September 1, 2021 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: September 1, 2021, 15:30 local (20:30 UTC) - Place: Grantsburg, WI - Coordinates: 45.774231, -92.680506 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=45.7742&lon=-92.6805&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Abnormal runway contact](https://openairdocs.org/ntsb-events/090) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Central Region - Parties: FAA - NTSB case key (mKey): 103801 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN21LA398 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/103801/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=103801 - Page: https://openairdocs.org/ntsb/CEN21LA398 ## Probable cause The pilot’s improper landing flare, which resulted in abnormal runway contact and the nose landing gear collapsing. ## 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: [Segarra Lucas JR ZENITH STOLL 701, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05630KQ), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Performance/control parameters: landing flare](https://openairdocs.org/ntsb-findings/01062041): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Segarra Lucas JR ZENITH STOLL 701, 1 case](https://openairdocs.org/ntsb-findings/01062041/cases.md?model=05630KQ), [All aircraft, 1,285 cases](https://openairdocs.org/ntsb-findings/01062041/cases.md) - [Terrain: rough terrain](https://openairdocs.org/ntsb-findings/03021015): Environmental issues › Physical environment · Effect on operation; cases with it: [Segarra Lucas JR ZENITH STOLL 701, 1 case](https://openairdocs.org/ntsb-findings/03021015/cases.md?model=05630KQ), [All aircraft, 442 cases](https://openairdocs.org/ntsb-findings/03021015/cases.md) - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Pilot; cases with it: [Segarra Lucas JR ZENITH STOLL 701, 1 case](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=05630KQ), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Abnormal runway contact](https://openairdocs.org/ntsb-events/090) (defining event); cases with it: [Segarra Lucas JR ZENITH STOLL 701, 1 case](https://openairdocs.org/ntsb-events/090/sequence.md?model=05630KQ), [All aircraft, 1,506 cases](https://openairdocs.org/ntsb-events/090/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Segarra Lucas JR ZENITH STOLL 701, 1 case](https://openairdocs.org/ntsb-events/096/sequence.md?model=05630KQ), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis During landing with a slight quartering tail wind, the airplane touched down on the grass runway. The pilot reported that the runway was rougher than anticipated and attempted to lift the nose wheel for the remaining landing roll. The airplane became airborne, and the pilot pushed the control stick to a nose down position. The airplane bounced and then landed on the side of the nose wheel. The nose wheel collapsed, and the airplane flipped over and came to rest inverted. During the accident sequence, the airplane sustained substantial damage to the vertical stabilizer, rudder, and aft fuselage. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operations. ## Aircraft - Registration: [N705L](https://openairdocs.org/aircraft/N705L), registered now, S/N 7-6170, built 2011 (OpenAirDocs) - Reported make and model: SEGARRA LUCAS JR ZENITH STOLL 701 - Registry model: [Segarra Lucas JR ZENITH STOLL 701](https://openairdocs.org/model/segarra-lucas-jr-zenith-stoll-701) (registry code 05630KQ) (OpenAirDocs) - Registry engine: [Volkswagen CONVERSION](https://openairdocs.org/engine/volkswagen-conversion) (registry code 63501, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 7-6170 - Year built: 2011 - Engines: Volkswagen 2300 CC reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, June 7, 2021 - Destination: Same as departure - Airport: GTG, Grantsburg Muni, runway 05/23, 3,280 × 120 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 68; injuries: none; private; airplane ratings: single-engine land; last flight review January 1, 2018; seat: left; restraint: 3-point; flight hours: 200 total, 40 in this make and model, 200 as pilot in command, 19 in the last 90 days ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none ## 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 20210901018589A](https://openairdocs.org/incident/20210901018589A), Sep 1, 2021: Segarra Lucas Jr ZENITH STOLL 701, Grantsburg, WI, Substantial damage. 2021-09-01 N705L, a zenith 701 flipped over after landing on the grass rwy 23 at Grantsburg, WI. (Kgtg) PIC was headed out for a local flight. The winds… ## Docket (2 files) The files NTSB released with the investigation on September 23, 2021, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=103801. 1.0 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 364 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12706832&FileExtension=pdf&FileName=Pilot%206120_Redacted-Rel.pdf - Photo array (item 2, PDF, 1 page, 648 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12707556&FileExtension=pdf&FileName=Photo%20Array-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.