NTSB investigations, OH
329 cases where the phase of flight was Takeoff.
Cases per year
| 1964 | 15 |
|---|---|
| 1965 | 13 |
| 1966 | 11 |
| 1967 | 7 |
| 1968 | 21 |
| 1969 | 7 |
| 1970 | 8 |
| 1971 | 11 |
| 1972 | 2 |
| 1973 | 7 |
| 1974 | 14 |
| 1975 | 1 |
| 1976 | 7 |
| 1977 | 16 |
| 1978 | 7 |
| 1979 | 10 |
| 1980 | 7 |
| 1981 | 2 |
| 1982 | 6 |
| 1983 | 5 |
| 1984 | 6 |
| 1985 | 3 |
| 1986 | 1 |
| 1987 | 6 |
| 1988 | 7 |
| 1989 | 2 |
| 1990 | 5 |
| 1992 | 3 |
| 1993 | 2 |
| 1994 | 7 |
| 1995 | 6 |
| 1996 | 1 |
| 1997 | 5 |
| 1998 | 3 |
| 1999 | 1 |
| 2000 | 5 |
| 2001 | 5 |
| 2002 | 4 |
| 2003 | 4 |
| 2004 | 3 |
| 2005 | 4 |
| 2006 | 3 |
| 2007 | 3 |
| 2008 | 2 |
| 2009 | 3 |
| 2010 | 5 |
| 2011 | 5 |
| 2012 | 6 |
| 2013 | 3 |
| 2014 | 3 |
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 3 |
| 2018 | 3 |
| 2019 | 5 |
| 2020 | 2 |
| 2021 | 5 |
| 2022 | 2 |
| 2024 | 2 |
| 2025 | 6 |
| 2026 | 5 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "WITH phase_names(main, name) AS (VALUES (100, 'Prior to flight'), (150, 'Standing'), (200, 'Pushback/towing'), (250, 'Taxi'), (300, 'Takeoff'), (350, 'Initial climb'), (400, 'Enroute'), (450, 'Maneuvering'), (500, 'Approach'), (550, 'Landing'), (600, 'Emergency descent'), (650, 'Uncontrolled descent'), (700, 'Post-impact'), (750, 'After landing'), (800, 'Other'), (990, 'Unknown')),
crosswalk(code, main, name) AS (VALUES (500, 150, 'Standing'), (501, 150, 'Standing - pre-flight'), (502, 150, 'Standing - starting engine(s)'), (503, 150, 'Standing - engine(s) operating'), (504, 150, 'Standing - engine(s) not operating'), (505, 150, 'Standing - idling rotors'), (510, 250, 'Taxi'), (511, 200, 'Taxi - pushback/tow'), (512, 250, 'Taxi - to takeoff'), (513, 250, 'Taxi - from landing'), (514, 250, 'Taxi - aerial'), (520, 300, 'Takeoff'), (521, 300, 'Takeoff - roll/run'), (522, 350, 'Takeoff - initial climb'), (523, 300, 'Takeoff - aborted'), (530, 400, 'Climb'), (531, 400, 'Climb - to cruise'), (540, 400, 'Cruise'), (541, 400, 'Cruise - normal'), (542, 400, 'Maneuvering - holding (IFR)'), (550, 400, 'Descent'), (551, 400, 'Descent - normal'), (552, 600, 'Descent - emergency'), (553, 650, 'Descent - uncontrolled'), (560, 500, 'Approach'), (561, 500, 'Approach - VFR pattern - downwind'), (562, 500, 'Approach - VFR pattern - base turn'), (563, 500, 'Approach - VFR pattern - base leg/base to final'), (564, 500, 'Approach - VFR pattern - final approach'), (565, 500, 'Go-around (VFR)'), (566, 500, 'Approach - IAF to FAF/outer marker (IFR)'), (567, 500, 'Approach - FAF/outer marker to threshold (IFR)'), (568, 500, 'Circling (IFR)'), (569, 500, 'Missed approach (IFR)'), (570, 550, 'Landing'), (571, 550, 'Landing - flare/touchdown'), (572, 550, 'Landing - roll'), (573, 550, 'Landing - aborted'), (574, 550, 'Emergency landing'), (575, 550, 'Emergency landing after takeoff'), (576, 600, 'Emergency descent/landing'), (580, 450, 'Maneuvering'), (581, 450, 'Maneuvering - aerial application'), (582, 450, 'Maneuvering - turn to reverse direction'), (583, 450, 'Maneuvering - turn to landing area (emergency)'), (590, 450, 'Hover'), (591, 450, 'Hover - in ground effect'), (592, 450, 'Hover - out of ground effect'), (600, 800, 'Other'), (610, 990, 'Unknown')),
current_codes AS (
SELECT e.case_mkey, TRY_CAST(e.\"tier1Number\" AS INTEGER) AS code,
row_number() OVER (PARTITION BY e.case_mkey ORDER BY coalesce(e.\"isDefiningEvent\", false) DESC, e.position) AS n
FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e
WHERE e.aircrafts_position = 1 AND e.\"tier1Number\" GLOB '[1-9][0-9]*'
AND (e.\"isDefiningEvent\" OR e.case_mkey IN (SELECT \"mKey\" FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' WHERE \"isPre1982\"))
),
phases AS (
SELECT case_mkey, 'current' AS scheme, code, CASE WHEN code >= 990 THEN 990 ELSE code // 50 * 50 END AS main
FROM current_codes WHERE n = 1
UNION ALL
SELECT o.case_mkey, 'older', o.\"phaseOfFlightCode\", w.main
FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o JOIN crosswalk w ON w.code = o.\"phaseOfFlightCode\"
WHERE o.aircrafts_position = 1 AND o.\"occurrenceNumber\" = 1 AND o.case_mkey NOT IN (SELECT case_mkey FROM current_codes)
),
case_phases AS (
SELECT p.*, c.\"eventDate\", c.\"highestInjuryLevel\" = 'Fatal' AS fatal, a.aircraft_model_code
FROM phases p JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c.\"mKey\" = p.case_mkey
LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = p.case_mkey AND a.position = 1
WHERE c.\"eventDate\" >= DATE '1962-01-01' AND p.main IN (SELECT main FROM phase_names)
)
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.\"eventStateOrRegion\" = 'OH' AND c.\"eventCountry\" = 'USA'
AND c.\"mKey\" IN (SELECT case_mkey FROM case_phases WHERE main = 300)
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.
WITH phase_names(main, name) AS (VALUES (100, 'Prior to flight'), (150, 'Standing'), (200, 'Pushback/towing'), (250, 'Taxi'), (300, 'Takeoff'), (350, 'Initial climb'), (400, 'Enroute'), (450, 'Maneuvering'), (500, 'Approach'), (550, 'Landing'), (600, 'Emergency descent'), (650, 'Uncontrolled descent'), (700, 'Post-impact'), (750, 'After landing'), (800, 'Other'), (990, 'Unknown')),
crosswalk(code, main, name) AS (VALUES (500, 150, 'Standing'), (501, 150, 'Standing - pre-flight'), (502, 150, 'Standing - starting engine(s)'), (503, 150, 'Standing - engine(s) operating'), (504, 150, 'Standing - engine(s) not operating'), (505, 150, 'Standing - idling rotors'), (510, 250, 'Taxi'), (511, 200, 'Taxi - pushback/tow'), (512, 250, 'Taxi - to takeoff'), (513, 250, 'Taxi - from landing'), (514, 250, 'Taxi - aerial'), (520, 300, 'Takeoff'), (521, 300, 'Takeoff - roll/run'), (522, 350, 'Takeoff - initial climb'), (523, 300, 'Takeoff - aborted'), (530, 400, 'Climb'), (531, 400, 'Climb - to cruise'), (540, 400, 'Cruise'), (541, 400, 'Cruise - normal'), (542, 400, 'Maneuvering - holding (IFR)'), (550, 400, 'Descent'), (551, 400, 'Descent - normal'), (552, 600, 'Descent - emergency'), (553, 650, 'Descent - uncontrolled'), (560, 500, 'Approach'), (561, 500, 'Approach - VFR pattern - downwind'), (562, 500, 'Approach - VFR pattern - base turn'), (563, 500, 'Approach - VFR pattern - base leg/base to final'), (564, 500, 'Approach - VFR pattern - final approach'), (565, 500, 'Go-around (VFR)'), (566, 500, 'Approach - IAF to FAF/outer marker (IFR)'), (567, 500, 'Approach - FAF/outer marker to threshold (IFR)'), (568, 500, 'Circling (IFR)'), (569, 500, 'Missed approach (IFR)'), (570, 550, 'Landing'), (571, 550, 'Landing - flare/touchdown'), (572, 550, 'Landing - roll'), (573, 550, 'Landing - aborted'), (574, 550, 'Emergency landing'), (575, 550, 'Emergency landing after takeoff'), (576, 600, 'Emergency descent/landing'), (580, 450, 'Maneuvering'), (581, 450, 'Maneuvering - aerial application'), (582, 450, 'Maneuvering - turn to reverse direction'), (583, 450, 'Maneuvering - turn to landing area (emergency)'), (590, 450, 'Hover'), (591, 450, 'Hover - in ground effect'), (592, 450, 'Hover - out of ground effect'), (600, 800, 'Other'), (610, 990, 'Unknown')),
current_codes AS (
SELECT e.case_mkey, TRY_CAST(e."tier1Number" AS INTEGER) AS code,
row_number() OVER (PARTITION BY e.case_mkey ORDER BY coalesce(e."isDefiningEvent", false) DESC, e.position) AS n
FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e
WHERE e.aircrafts_position = 1 AND e."tier1Number" GLOB '[1-9][0-9]*'
AND (e."isDefiningEvent" OR e.case_mkey IN (SELECT "mKey" FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' WHERE "isPre1982"))
),
phases AS (
SELECT case_mkey, 'current' AS scheme, code, CASE WHEN code >= 990 THEN 990 ELSE code // 50 * 50 END AS main
FROM current_codes WHERE n = 1
UNION ALL
SELECT o.case_mkey, 'older', o."phaseOfFlightCode", w.main
FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o JOIN crosswalk w ON w.code = o."phaseOfFlightCode"
WHERE o.aircrafts_position = 1 AND o."occurrenceNumber" = 1 AND o.case_mkey NOT IN (SELECT case_mkey FROM current_codes)
),
case_phases AS (
SELECT p.*, c."eventDate", c."highestInjuryLevel" = 'Fatal' AS fatal, a.aircraft_model_code
FROM phases p JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = p.case_mkey
LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = p.case_mkey AND a.position = 1
WHERE c."eventDate" >= DATE '1962-01-01' AND p.main IN (SELECT main FROM phase_names)
)
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."eventStateOrRegion" = 'OH' AND c."eventCountry" = 'USA'
AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 300)
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 ERA27LA028Accident · No injuriesClass 4 · LimitedInvestigation openCessna 310R · Dayton, OHNTSB ERA27LA008Accident · Minor injuriesClass 4 · LimitedInvestigation openZielke Ronald W Zenith 750 · Marysville, OHNTSB ERA26LA292Accident · No injuriesClass 4 · LimitedFinal reportExtra Flugzeugproduktions-Und EA 300/LT · Whitehouse, OHThe pilot’s failure to ensure the canopy was properly locked before flight, which resulted in the canopy opening during takeoff.NTSB CEN26FA222Accident · 1 fatalClass 3 · FieldPreliminary reportCirrus Design SR20 · Wheelers Mill, OHOn June 11, 2026, about 1030 eastern daylight time, a Cirrus SR20 airplane, N858SD, was destroyed when it was involved in an accident near Wheelers Mill, Ohio. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations…NTSB ERA26LA237Accident · No injuriesClass 4 · LimitedFinal reportSinclair Pete Lancair ES · Youngstown, OHThe pilot’s failure to maintain directional control during takeoff roll, which resulted in a runway excursion and collision with an approach lighting system.NTSB ERA25LA325Accident · No injuriesClass 4 · LimitedFinal reportCessna 182 · Lebanon, OHThe pilot’s failure to maintain directional control of the airplane during takeoff, which resulted in a runway excursion and collision with a sign.NTSB ERA25FA246Accident · 6 fatalClass 3 · FieldPreliminary reportCessna 441 · Warren, OHOn June 29, 2025, about 0654 eastern daylight time, a Cessna 441, N441LS, was destroyed when it was involved in an accident near Warren, Ohio. The airline transport pilot and five passengers were fatally injured. The airplane was operated as a Title 14 Code…NTSB ERA25LA245Accident · Minor injuriesClass 4 · LimitedFinal reportCessna 177 · Kelleys Island, OHThe pilot’s failure to maintain control of the airplane while taking off in gusting crosswind conditions.NTSB ERA25LA219Accident · No injuriesClass 4 · LimitedFinal reportFred L Wellman CH 750 Cruzer · Medina, OHThe pilot’s failure to maintain control of the airplane during takeoff, which resulted in a runway excursion.NTSB ERA25LA212Accident · No injuriesClass 4 · LimitedFinal reportAir Tractor AT-602 · Fremont, OHThe pilot’s inadequate takeoff performance planning, which resulted in a runway overrun and collision with terrain.NTSB ERA25LA206Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-28-181 · Tiffin, OHThe airplane’s collision with a deer on the runway during takeoff.NTSB ERA24FA362Accident · 1 fatalClass 3 · FieldFinal reportSchleicher Alexander ASH 26 E · Waynesville, OHA loss of control on takeoff for undetermined reasons.NTSB ERA24FA120Accident · 3 fatalClass 3 · FieldFinal reportPiper PA32 · Jackson, OHThe non-instrument-rated pilot’s decision to depart under visual flight rules into instrument meteorological conditions, which resulted in an inflight collision with terrain while maneuvering.NTSB ERA22LA428Accident · No injuriesClass 3 · LimitedFinal reportZenith CH 750 · Cincinnati, OHThe airplane builder’s installation of incorrect hardware in the control yoke assembly, which resulted in a loss of control during takeoff.NTSB ERA22LA310Accident · No injuriesClass 3 · LimitedFinal reportCubcrafters CC11-160 · Findlay, OHThe pilot/mechanic’s inadequate inspection of the faulty horizontal stabilizer trim switch, which resulted in an uncommanded trim movement during the takeoff roll, which resulted in an aborted takeoff, and subsequent nose over.NTSB CEN21FA426Accident · 1 fatalClass 3 · FieldFinal reportRans S20 · Wadsworth, OHThe pilot’s decision to depart shortly after a landing helicopter, which resulted in an encounter with the helicopter’s wake turbulence and a loss of airplane control. Contributing to the accident was the pilot’s impairment by his recent use of ethanol.NTSB CEN21LA288Accident · No injuriesClass 3 · LimitedFinal reportVining SD1 Minisport · Butler, OHThe pilot’s failure to maintain adequate airspeed following a partial loss of engine power, which resulted in an aerodynamic stall and impact with terrain. The reason for the partial loss of engine power could not be determined based on available information.NTSB CEN21LA301Accident · No injuriesClass 4 · LimitedFinal reportChristen Industries A-1 · Wilmington, OHThe pilot’s failure to maintain directional control during takeoff with gusting winds, which resulted in an inflight collision with a fence.NTSB CEN21LA237Accident · Serious injuriesClass 3 · LimitedFinal reportGrumman G164 · Celina, OHA loss of engine power for undetermined reasons.NTSB CEN21LA229Accident · Minor injuriesClass 4 · LimitedFinal reportPiper PA-28-140 · Washington Court House, OHThe pilot's failure to maintain directional control during a soft field takeoff.NTSB CEN21LA049Accident · No injuriesClass 3 · LimitedFinal reportPiper PA32 · Circleville, OHThe total loss of engine power due to an accessory drive gear that backed out impeding the other gears.NTSB CEN21LA041Accident · No injuriesClass 4 · LimitedFinal reportCirrus SR22 · Xenia, OHThe airplane’s impact with a deer during takeoff.NTSB CEN20CA039Accident · Minor injuriesData collectionFinal reportFlight Design Ctsw · Delaware, OHThe student pilot’s failure to maintain yaw control during takeoff, which resulted in an aborted takeoff and subsequent landing on grassy terrain, during which the airplane bounced and then nosed over.NTSB CEN19LA263Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 172 · New Carlisle, OHThe pilot’s excessive use of pitch control during rotation, which resulted in the airplane exceeding its critical angle of attack and entering an aerodynamic stall shortly after liftoff.NTSB GAA19CA438Accident · No injuriesData collectionFinal reportBeech 19 · Columbia Station, OHThe pilot's failure to see and avoid tall grass along the side of the runway during the takeoff roll, which resulted in his loss of directional control, a runway excursion, and nose-over.NTSB CEN19FA191Accident · 1 fatalClass 3 · FieldFinal reportPiper J3C · Elyria, OHA loss of engine power due to carburetor icing, and the pilot’s subsequent exceedance of the airplane’s critical angle of attack, which resulted in an aerodynamic stall and impact with terrain.NTSB CEN19LA181Accident · Serious injuriesClass 3 · LimitedFinal reportQuicksilver Sport · Barnesville, OHThe pilot's loss of control for undetermined reasons.NTSB CEN18LA362Accident · Serious injuriesClass 3 · LimitedFinal reportLuscombe 8 · New Carlisle, OHA total loss of engine power shortly after takeoff due to carburetor ice.NTSB CEN18LA173Accident · Serious injuriesLimited investigationFinal reportGrumman American Avn. AA 1B · Hamilton, OHThe loss of engine power during takeoff for reasons that could not be determined because postaccident examination revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.NTSB GAA18CA276Accident · No injuriesData collectionFinal reportCessna 172 · Batavia, OHThe pilot’s decision to take off with the airplane over its maximum gross weight due to his failure to perform preflight weight and balance calculations, which affected the airplane’s takeoff performance, and his subsequent decision to abort the takeoff with…NTSB GAA18CA089Accident · Minor injuriesData collectionFinal reportRobinson Helicopter R44 · Newark, OHThe pilot’s failure to maintain lateral control of the helicopter during takeoff, which resulted in dynamic rollover.NTSB GAA17CA297Accident · Minor injuriesData collectionFinal reportCGS Hawk · Findlay, OHThe pilot’s failure to maintain adequate airspeed and his exceedance of the airplane’s critical angle of attack during takeoff, which resulted in an aerodynamic stall.NTSB CEN17LA104Accident · No injuriesLimited investigationFinal reportBeech D55 · Columbus, OHThe partial loss of left engine power during takeoff and initial climb, which led to a hard landing in gusting crosswind conditions. The reason for the loss of engine power could not be determined because postaccident examination of the left engine revealed…NTSB CEN16LA178Accident · No injuriesLimited investigationFinal reportMooney M20K · Akron, OHA missing bolt in the nose landing gear assembly, which resulted in the airplane suddenly turning left and the pilot's inability to maintain directional control during a crosswind takeoff.NTSB GAA16CA139Accident · No injuriesData collectionFinal reportCessna 172 · Willoughby, OHThe student pilot's failure to reduce pitch attitude during a simulated engine failure during takeoff initial climb, resulting in a high descent rate and hard landing. Contributing to the accident was the flight instructor's delayed remedial action during the…NTSB CEN15LA391Accident · Minor injuriesLimited investigationFinal reportFerence John W Thatcher CX4A · Hebron, OHThe loss of engine power for reasons that could not be determined because a postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.NTSB CEN15FA088Accident · 1 fatalField investigationFinal reportPiper PA 23-160 · Port Clinton, OHThe pilot's loss of control following a loss of left engine power for reasons that could not be determined because an examination of the airframe and engine did not reveal any preimpact abnormalities.NTSB CEN15LA024Accident · Serious injuriesLimited investigationFinal reportCessna 172K · Xenia, OHThe failure of the seat track mechanism, which led the pilot to inadvertently apply aft yoke and lift his feet off the rudder pedals and resulted in a loss of directional control during takeoff.NTSB CEN14LA445Accident · Serious injuriesLimited investigationFinal reportFranke Roland SKY Raider · Bethel, OHThe pilot's inadvertent aerodynamic stall while maneuvering after a loss of engine power during initial climb. Contributing to the accident was the total loss of engine power for reasons that could not be determined because the investigation could not…NTSB CEN13LA361Accident · No injuriesLimited investigationFinal reportPiper PA-30 · Dayton, OHThe pilot’s loss of control of the airplane for reasons that could not be undetermined because a postaccident examination of the airplane did not reveal any anomalies that would have precluded normal operation.NTSB CEN13LA366Accident · No injuriesLimited investigationFinal reportIsrael Aircraft Industries 1124 · Cincinnati, OHLoss of control due to insufficient airspeed on takeoff and premature landing gear retraction, which resulted in the collapse of the left landing gear as the airplane impacted the runway.NTSB CEN13LA304Accident · Minor injuriesLimited investigationFinal reportAnkestar, Bradley D. RAND-ROBINSON KR2 · Hamilton, OHThe loss of engine power due to vapor lock in the fuel system. Contributing to the accident was the operation of the airplane with automotive gasoline and the installation of noninsulated fuel components near heat sources in the engine compartment.NTSB CEN13CA031Accident · No injuriesData collectionFinal reportCessna 150 · Carrollton, OHThe airplane’s collision with two deer during the takeoff roll.NTSB CEN12CA585Accident · No injuriesData collectionFinal reportCessna 180 · Brookville, OHThe pilot's failure to maintain directional control of the airplane during the attempted takeoff in gusting crosswind conditions.NTSB CEN12LA448Accident · Serious injuriesLimited investigationFinal reportChapman Mark A Trike · Marlboro, OHThe student pilot’s failure to maintain adequate airspeed during a turn, which resulted in an aerodynamic stall.NTSB CEN12IA451Incident · No injuriesIncident investigationFinal reportFlight Design Ctls · Marysville, OHFatigue failure of the left main wheel assembly on takeoff, which resulted in a loss of directional control and runway excursion.NTSB CEN12LA445Accident · No injuriesLimited investigationFinal reportCzech Aircraft Works Spol Sro SportCruiser · Waynesville, OHThe airplane's collision with fence posts during an aborted takeoff due to a sudden change in wind direction.NTSB CEN12LA381Accident · Serious injuriesLimited investigationFinal reportPiper J3C-65 · Farmersville, OHThe pilot did not maintain directional control of the airplane on takeoff after noting reduced engine power in high density altitude.NTSB CEN11FA597Accident · 1 fatalField investigationFinal reportNichols Lancair 235 · Heath, OHThe pilot's failure to obtain adequate familiarization with the accident airplane type before the accident flight, which resulted in his failure to maintain airplane control during takeoff.NTSB CEN11LA591Accident · Minor injuriesLimited investigationFinal reportAmerican Autogyro Sparrowhawk · Delaware, OHThe noncertificated pilot did not maintain adequate airspeed and aircraft control during initial climb.