NTSB investigations: Amateur-built UNKNOWN ENG
85 cases on aircraft whose registry engine model is Amateur-built UNKNOWN ENG, where the defining event was Loss of control on ground. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 2008 | 4 |
|---|---|
| 2009 | 4 |
| 2010 | 7 |
| 2011 | 5 |
| 2012 | 9 |
| 2013 | 1 |
| 2014 | 4 |
| 2015 | 5 |
| 2016 | 4 |
| 2017 | 7 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 1 |
| 2022 | 8 |
| 2023 | 8 |
| 2024 | 1 |
| 2025 | 5 |
| 2026 | 2 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c.\"mKey\" AND a.position = 1
WHERE c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('99999')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e.\"isDefiningEvent\" AND e.\"tier2Number\" = '230'))
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('99999')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '230'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB WPR26LA225Accident · Serious injuriesClass 3 · LimitedPreliminary reportUltramagic N-300 · Pahrump, NVOn June 18, 2026, at 0645 mountain daylight time, an Ultramagic SA N-300 balloon, N330LV, was substantially damaged when it was involved in an accident near Pahrump, Nevada. The pilot and 2 passengers were seriously injured; 7 passengers sustained minor…NTSB ANC26LA045Accident · No injuriesClass 4 · LimitedInvestigation openCessna 170B · Bethel, AKNTSB ERA26LA058Accident · No injuriesClass 4 · LimitedFinal reportHuebbe Tom MAX TH · Inverness Highlands South, FLThe pilot’s failure to maintain directional control on takeoff. Contributing to the accident was the aircraft design that did not incorporate differential braking.NTSB CEN25LA405Accident · Minor injuriesClass 4 · LimitedFinal reportSukhoi SU-26MX · Longmont, COThe pilot's failure to maintain directional control during takeoff.NTSB WPR25LA280Accident · No injuriesClass 4 · LimitedFinal reportWeaver Harmon Rocket · Hayden, IDThe pilot’s loss of directional control during landing, which resulted in a runway excursion and collision with terrain.NTSB CEN25LA258Accident · No injuriesClass 4 · LimitedFinal reportZenith Stol CH701 · Blaine, MNThe pilot’s failure to maintain directional control while landing with a crosswind.NTSB WPR25LA083Accident · No injuriesClass 4 · LimitedFinal reportCharles E Spencer CCK-1865 · Vacaville, CAThe pilot’s failure to maintain directional control during the landing roll.NTSB CEN25LA010Accident · No injuriesClass 4 · LimitedFinal reportZodiac 601 · Augusta, KSThe pilot’s failure to maintain directional control during the landing roll.NTSB CEN24LA032Accident · Minor injuriesClass 4 · LimitedFinal reportTom Hodgson 29 · Kokomo, INThe pilot’s failure to maintain directional control during the landing roll.NTSB WPR24LA015Accident · No injuriesClass 4 · LimitedFinal reportBoeing A75N1(PT17) · Mesa, AZThe flight instructor’s failure to maintain directional control during the landing roll, which resulted in a ground loop.NTSB WPR23LA292Accident · No injuriesClass 4 · LimitedFinal reportJohn Espe Cruiser · Buhl, IDThe pilot's failure to maintain airplane control during landing with a gusting tail wind.NTSB ERA23LA278Accident · No injuriesClass 4 · LimitedFinal reportGopalan Hariharan 4 Place · Sanford, NCThe pilot’s failure to maintain directional control while landing in a crosswind, which resulted in a nose over.NTSB WPR23LA179Accident · No injuriesClass 4 · LimitedFinal reportELY John M Vans Acft RV-8 · North Las Vegas, NVThe pilot’s failure to maintain directional control during landing in gusting wind conditions, which resulted in a ground loop.NTSB WPR23LA354Accident · No injuriesClass 4 · LimitedFinal reportKerr John Hatz Classic · Ennis, MTThe pilot’s failure to maintain directional control during the landing roll which resulted in a ground-loop.NTSB WPR23LA132Accident · No injuriesClass 4 · LimitedFinal reportFay David Velocity Elite · Bullhead City, AZThe student pilot’s improper landing during crosswind conditions and the flight instructor’s failure to take remedial action, which resulted in a loss of control.NTSB CEN23LA109Accident · No injuriesClass 4 · LimitedFinal reportCessna 150 · Montevideo, MNThe pilot’s failure to maintain directional control during the landing roll.NTSB WPR23LA064Accident · No injuriesClass 4 · LimitedFinal reportArado-Flugzeugwerke FW190 A-5 · Casa Grande, AZThe pilot’s failure to maintain directional control during the landing roll.NTSB WPR22LA366Accident · No injuriesClass 4 · LimitedFinal reportArter Warren Carbon CUB CCK-1865 · Willard, UTThe pilot’s failure to maintain directional control during the landing roll.NTSB ERA22LA400Accident · No injuriesClass 4 · LimitedFinal reportAeronca 7AC · Marysville, OHThe pilot’s failure to maintain directional control during landing.NTSB WPR22LA318Accident · No injuriesClass 4 · LimitedFinal reportLeon E Everett Carbon CUB EX · Maricopa, AZThe pilot's failure to maintain airplane control during landing with a crosswind and the use of excessive braking application, which resulted in a nose over.NTSB ANC22LA059Accident · No injuriesClass 4 · LimitedFinal reportKakeldey Ronald O Smith PA12 EXP · Beluga, AKThe pilot’s loss of control during the landing roll.NTSB CEN22LA191Accident · Serious injuriesClass 3 · LimitedFinal reportVans RV6A · Mankato, MNThe pilot’s failure to maintain directional control while landing with a higher airspeed.NTSB ERA22LA165Accident · Minor injuriesClass 4 · LimitedFinal reportNordquist Richard A Vans RV7 · Polk City, FLA loss of control during landing due to the loose and uneven landing surface.NTSB WPR22LA108Accident · No injuriesClass 4 · LimitedFinal reportKitfox S7 · Phoenix, AZThe pilot’s improper landing flare and subsequent failure to maintain directional control of the airplane during landing, which resulted in a runway excursion.NTSB WPR21LA165Accident · No injuriesClass 4 · LimitedFinal reportBryan S Happell TANGO2 · Hayden, IDThe pilot’s failure to control the pitch attitude of the gyroplane during landing, which resulted in a loss of control, runway excursion and collision with terrain.NTSB ERA21LA048Accident · No injuriesClass 4 · LimitedFinal reportVans RV4 · Milton, FLThe pilot's failure to maintain directional control during a crosswind landing.NTSB ANC20CA062Accident · No injuriesClass 4 · Data collectionFinal reportCub Crafters CCK-1865 · Juneau, AKThe pilot's failure to maintain directional control during the landing rollout, which resulted in a ground loop.NTSB WPR20CA142Accident · No injuriesClass 4 · Data collectionFinal reportN126c CCX-2000 · Heber City, UTThe front seat pilot's failure to maintain directional control during the landing roll, and the rear seat pilot's delayed remedial control inputs that subsequently resulted in a ground loop. Contributing to the accident was a lack of communication by both…NTSB ERA20CA107Accident · No injuriesData collectionFinal reportOrlican L60 · Frederick, MDThe pilot's failure to maintain airplane control during the approach, which resulted in the airplane ballooning and then veering left upon landing and the right wing impacting the runway.NTSB GAA19CA483Accident · Serious injuriesData collectionFinal reportSchleicher ASW 24 · Paulden, AZThe pilot's distraction due to the environment, his failure to lower the landing gear, and his subsequent failure to maintain directional control while landing the glider, which resulted in impact with a utility box.NTSB GAA19CA349Accident · No injuriesData collectionFinal reportPiper PA18 · Beluga, AKThe pilot's selection of unsuitable terrain for landing, which resulted in a noseover.NTSB GAA19CA298Accident · No injuriesData collectionFinal reportPiper PA18 · Sparta, ILThe pilot's failure to maintain directional control during the landing roll, which resulted in a ground-loop.NTSB GAA19CA200Accident · No injuriesData collectionFinal reportZenair Zenith CH 801 · Fort Worth, TXThe pilot's failure to maintain lateral control in flight and his subsequent loss of directional control during landing with a crosswind, which resulted in a runway excursion and impact with terrain.NTSB GAA19CA075Accident · No injuriesData collectionFinal reportDarren M. Vinelli Sopwith PUP · Rio Vista, CAThe pilot's failure to maintain directional control during the landing roll in gusting tailwind conditions.NTSB GAA18CA437Accident · No injuriesData collectionFinal reportCessna 180 · Bozeman, MTThe pilot's failure to maintain directional control during landing.NTSB GAA18CA033Accident · No injuriesData collectionFinal reportEvolution Revo · Berlin, NHThe pilot’s failure to center the ground steering before landing, which resulted in a loss of directional control.NTSB GAA18CA011Accident · No injuriesData collectionFinal reportDehavilland DHC 1 · Cedartown, GAThe pilot’s failure to maintain directional control during the landing roll.NTSB WPR17LA214Accident · No injuriesLimited investigationFinal reportSC Aerostar YAK 52W · El Cajon, CAThe pilot's failure to maintain directional control during taxi after a reduction in braking performance and steering capabilities due to his failure to reopen the air supply valve after the nonstandard engine start.NTSB GAA17CA512Accident · No injuriesData collectionFinal reportAviat A 1 · Cody, WYThe pilot’s failure to maintain directional control during the landing roll.NTSB GAA17CA460Accident · No injuriesData collectionFinal reportCessna 305 · Eagle Lake, TXThe pilot’s loss of directional control during landing in variable wind conditions.NTSB GAA17CA480Accident · No injuriesData collectionFinal reportThomas J Hankamp VAN'S Aircraft RV4 · Poughkeepsie, NYThe pilot’s failure to maintain directional control during takeoff.NTSB ANC17CA023Accident · No injuriesData collectionFinal reportWsk-Pzl Warzawa-Okecie PZL 104 Wilga 80 · Talkeetna, AKThe pilot's failure to maintain directional control during the landing roll. Contributing to the accident were the pilot's lack of training and experience in the accident make and model airplane.NTSB GAA17CA073Accident · No injuriesData collectionFinal reportCarter Richard L Buddy Baby Lakes · Hurricane, UTThe pilot's failure to maintain directional control during takeoff, which resulted in a runway excursion.NTSB GAA16CA391Accident · No injuriesData collectionFinal reportDiamond Aircraft Ind HK 36 · Blanchester, OHThe pilot's failure to maintain directional control of the powered glider during the landing roll.NTSB GAA16CA299Accident · Minor injuriesData collectionFinal reportBareiss David A Tango 2 · Sunrise Beach Village, TXThe nosewheel fairing becoming packed with debris during landing on the soft field due to a gap between the nosewheel tire and the fairing, which resulted in a loss of control and subsequent nose-over.NTSB ERA16CA102Accident · No injuriesData collectionFinal reportTucker Mitchel C H 13 · Zephyrhills, FLThe pilot's failure to maintain aircraft control while on ground standing with the engine running during high crosswind conditions which resulted in a static rollover and collision with the ground.NTSB GAA16CA061Accident · No injuriesData collectionFinal reportMelvin K Callen Backcountry Supercub · Fort Morgan, COThe pilot's excessive braking during the landing roll, which resulted in a nose over.NTSB GAA15LA225Accident · Serious injuriesLimited investigationFinal reportUltramagic N250 - NO Series · Peoria, AZThe pilot's failure to ensure that the passengers remained secure in the basket during deflation after landing, which resulted in a passenger falling out of the basket and sustaining a serious injury when a wind gust caught the envelope and tipped the basket…NTSB WPR15LA218Accident · No injuriesLimited investigationFinal reportDafoe Gerald W Tcow Smith CUB · Cascade, IDA gouge in the right brake master cylinder piston O-ring, which resulted in a loss of brake pressure and reduced effectiveness after landing. Contributing to the accident was the pilot’s decision to operate the airplane with an ongoing brake issue.NTSB GAA15CA132Accident · Minor injuriesData collectionFinal reportErvin Rex H Bear Hawk · Merrill, ORThe pilot's failure to maintain directional control during landing, which resulted in a ground loop.