Final NTSB investigations
13,323 cases where the phase of flight was Takeoff.
Cases per year
| 1962 | 4 |
|---|---|
| 1963 | 5 |
| 1964 | 352 |
| 1965 | 314 |
| 1966 | 410 |
| 1967 | 449 |
| 1968 | 327 |
| 1969 | 364 |
| 1970 | 345 |
| 1971 | 383 |
| 1972 | 265 |
| 1973 | 299 |
| 1974 | 343 |
| 1975 | 315 |
| 1976 | 281 |
| 1977 | 333 |
| 1978 | 344 |
| 1979 | 321 |
| 1980 | 251 |
| 1981 | 289 |
| 1982 | 254 |
| 1983 | 247 |
| 1984 | 238 |
| 1985 | 192 |
| 1986 | 182 |
| 1987 | 187 |
| 1988 | 168 |
| 1989 | 162 |
| 1990 | 185 |
| 1991 | 191 |
| 1992 | 146 |
| 1993 | 140 |
| 1994 | 175 |
| 1995 | 196 |
| 1996 | 145 |
| 1997 | 154 |
| 1998 | 153 |
| 1999 | 175 |
| 2000 | 162 |
| 2001 | 148 |
| 2002 | 153 |
| 2003 | 162 |
| 2004 | 129 |
| 2005 | 143 |
| 2006 | 127 |
| 2007 | 150 |
| 2008 | 163 |
| 2009 | 198 |
| 2010 | 190 |
| 2011 | 173 |
| 2012 | 173 |
| 2013 | 143 |
| 2014 | 171 |
| 2015 | 156 |
| 2016 | 162 |
| 2017 | 153 |
| 2018 | 143 |
| 2019 | 165 |
| 2020 | 164 |
| 2021 | 139 |
| 2022 | 135 |
| 2023 | 143 |
| 2024 | 139 |
| 2025 | 101 |
| 2026 | 54 |
Where
Latest 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.\"completionStatus\" = 'Completed'
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."completionStatus" = 'Completed'
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 CEN26LA317Accident · No injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Natchez, MSThe pilot’s failure to complete a preflight weight and balance calculation, which resulted in a center of gravity beyond the forward limit, and adversely affected the helicopter’s controllability during takeoff.NTSB CEN26LA315Accident · No injuriesClass 4 · LimitedFinal reportProgressive Aerodyne Searey · DeQuincy, LAThe pilot’s failure to maintain directional control during takeoff after encountering a wind gust. Contributing to the accident was nearby convective activity.NTSB CEN26LA304Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-28-161 · Hudson Oaks, TXThe pilot’s loss of directional control during the rejected takeoff, which resulted in a runway excursion. Contributing to the accident was the pilot’s decision to abort the takeoff after the airplane had accelerated above its normal rotation speed. Also…NTSB CEN26LA298Accident · Minor injuriesClass 4 · LimitedFinal reportRotor Effects M24 Plus · Waelder, TXThe pilot’s improper execution of rejected takeoff procedures, which resulted in loss of control and subsequent runway excursion.NTSB 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 ERA26LA277Accident · No injuriesClass 4 · LimitedFinal reportRans S-6-S · Morgan, VTThe pilot’s failure to maintain control of the airplane during takeoff, resulting in an aerodynamic stall and impact with water.NTSB CEN26LA260Accident · No injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 · Emerson, IAThe failure of the pilot to verify the loading hose had been disconnected before taking off and the failure of the loader to disconnect the fuel hose from the helicopter.NTSB WPR26LA267Accident · Minor injuriesClass 4 · LimitedFinal reportRans S7 · Kemmerer, WYThe pilot’s decision to perform a take-off in high-density-altitude, gusting-crosswind conditions, which resulted in an aerodynamic stall, hard landing and subsequent nose-over.NTSB ERA26LA272Accident · Minor injuriesClass 4 · LimitedFinal reportCessna 170B · Hartwell, GAThe pilot’s failure to compensate for the gusty and variable wind conditions, which resulted in a loss of control and collision with trees during takeoff.NTSB WPR26LA259Accident · No injuriesClass 4 · LimitedFinal reportVans RV8 · Monte Vista, COThe pilot’s failure to maintain directional control during takeoff in gusty crosswind conditions.NTSB CEN26LA245Accident · Serious injuriesClass 4 · LimitedFinal reportXag P150 MAX · Wolcott, INThe pilot’s failure to maintain control of the UAS during takeoff.NTSB ERA26LA255Accident · Minor injuriesClass 4 · LimitedFinal reportCessna 172M · Lafayette, TNThe passenger’s abrupt manipulation of the flight controls during takeoff, which resulted in a loss of directional control and collision with a fence.NTSB CEN26LA243Accident · Serious injuriesClass 4 · LimitedFinal reportEvolution Revolt · Peyton, COThe flight instructor’s inadequate supervision of the student pilot, which resulted in the loss of control during a rejected takeoff.NTSB ERA26LA247Accident · Serious injuriesClass 4 · LimitedFinal reportPiper PA-22-150 · Morganton, NCThe pilot and flight instructor’s failure to maintain directional control while maneuvering on the runway, which resulted in a runway excursion. Contributing to the accident was the pilot’s failure to complete a positive exchange of flight control following…NTSB WPR26LA229Accident · Minor injuriesClass 4 · LimitedFinal reportRyan Navion · Bismarck, MOThe pilot’s failure to remove the maintenance spacer before takeoff, which resulted in restricted flight control movement and a loss of control.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 ERA26LA229Accident · No injuriesClass 4 · LimitedFinal reportHawker Beechcraft G36 · Danbury, CTThe pilot’s decision to abort the takeoff with insufficient runway remaining, which resulted in a runway excursion.NTSB WPR26LA207Accident · No injuriesClass 4 · LimitedFinal reportBell 47G-2 · Mettler, CAThe pilot's failure to ensure the loading hose had been disconnected before takeoff, which resulted in an interrupted takeoff and subsequent loss of control. Contributing to the accident was the ground loader's failure to disconnect the hose before…NTSB CEN26LA210Accident · No injuriesClass 4 · LimitedFinal reportCessna 172S · Colorado Springs, COThe student pilot’s failure to maintain directional control of the airplane during the takeoff, which resulted in a runway excursion and collision with runway signs.NTSB WPR26LA213Accident · Serious injuriesClass 4 · LimitedFinal reportMoose SR 2500 · Sonoma, CAThe pilot's failure to maintain airspeed during a go-around in shifting wind conditions, which resulted in an exceedance of the airplane’s critical angle of attack and an aerodynamic stall.NTSB CEN26LA201Accident · Serious injuriesClass 4 · LimitedFinal reportCessna 172H · Berryville, ARThe pilot in command’s decision to continue the takeoff when the airplane was not airborne at midfield, and the student pilot’s likely improper technique that resulted in a lack of sufficient climb performance and subsequent loss of control.NTSB WPR26LA199Accident · Minor injuriesClass 4 · LimitedFinal reportBell 206-L4 · Cedar City, UTThe flight instructor's failure to maintain helicopter control while manipulating the engine governor reference rpm adjustment during hover operations, which resulted in a loss of control and impact with the ground.NTSB CEN26LA198Accident · No injuriesClass 4 · LimitedFinal reportCommander 114TC · Woodruff, WIThe pilot’s failure to maintain airplane control during the go-around.NTSB ERA26LA209Accident · Minor injuriesClass 4 · LimitedFinal reportCessna 172S · Harrison, NYThe student pilot’s excessive pitch up attitude during takeoff, which resulted in an aerodynamic stall and loss of control.NTSB ERA26LA210Accident · No injuriesClass 4 · LimitedFinal reportJohn Bradley Vans RV-7 · Athens, GAContamination of the left wheel brake system with debris, which resulted in a loss of directional control during takeoff.NTSB CEN26LA186Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-28R-201 · West Chicago, ILThe pilot’s improper decision to attempt an intersection takeoff and delay to abort the takeoff which resulted in a subsequent runway excursion.NTSB WPR26LA179Accident · No injuriesClass 4 · LimitedFinal reportCessna A150L · Superior, AZThe pilot's failure to retract the flaps during takeoff following a touch-and-go landing, which resulted in degraded climb performance and an impact with an object during an off-field landing.NTSB CEN26LA177Accident · No injuriesClass 4 · LimitedFinal reportAir Tractor AT-602 · El Campo, TXThe pilot’s failure to maintain aircraft control during takeoff resulting in a collision with a building during takeoff.NTSB ERA26LA187Accident · No injuriesClass 4 · LimitedFinal reportCessna 172 · Quakertown, PAThe pilot receiving instruction’s failure to maintain aircraft directional control during the takeoff roll. Contributing was the flight crew’s failure to ensure a positive exchange of flight controls during the takeoff roll.NTSB ANC26LA031Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-28-151 · Lapeer, MIThe flight instructor’s failure to maintain airplane control during a takeoff attempt, which resulted in an aerodynamic stall, runway excursion, and on ground collision with an object. Contributing to the accident was the flight instructor’s decision to…NTSB CEN26LA169Accident · No injuriesClass 4 · LimitedFinal reportLuscombe 8E · Meeker, COThe pilot’s inability to maintain climb performance and clearance from terrain due to the airplane’s encounter with windshear during takeoff.NTSB WPR26LA159Accident · Minor injuriesClass 4 · LimitedFinal reportCirrus Design SR22T · Fullerton, CAThe pilot’s loss of control during takeoff, due to the seat sliding aft.NTSB WPR26LA146Accident · No injuriesClass 4 · LimitedFinal reportBell Helicopter Textron 206L-1 · Chimney Rock, MTThe pilot’s failure to maintain adequate clearance from the terrain while performing a low altitude circling takeoff maneuver, which resulted in a dynamic rollover.NTSB ERA26LA157Accident · No injuriesClass 4 · LimitedFinal reportCirrus Design SR22T · Mount Pleasant, SCThe airplane’s encounter with uneven terrain during takeoff, which resulted in a runway excursion and impact with water.NTSB CEN26LA152Accident · No injuriesClass 4 · LimitedFinal reportEla ELA10 · Boulder, COThe pilot’s failure to maintain directional control during the takeoff in gusting wind conditions.NTSB ERA26LA227Accident · No injuriesClass 4 · LimitedFinal reportCessna 172R · Maiden, NCThe flight instructor’s inadequate preflight planning, which resulted in a rejected takeoff from a tailwind departure and subsequent runway excursion.NTSB CEN26LA146Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-24-250 · Madison, INThe pilot’s failure to maintain proper airspeed during takeoff and exceedance of the airplane’s critical angle of attack, which resulted in an aerodynamic stall and impact with terrain.NTSB ERA26LA147Accident · Minor injuriesClass 4 · LimitedFinal reportPiper PA24-180 · Leonardtown, MDThe pilot’s failure to maintain control during a crosswind takeoff, which resulted in a runway excursion and impact with a drainage ditch.NTSB CEN26LA134Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-18-150 · Sonora, TXThe pilot’s failure to maintain adequate airspeed during takeoff, which resulted in a loss of control and hard landing.NTSB WPR26LA115Accident · No injuriesClass 4 · LimitedFinal reportMightyfly MF-100 · Atwater, CAA control system anomaly, which resulted in the overload and failure of one of the propulsion motor systems during the transition from hover to forward flight.NTSB ERA26LA133Accident · Minor injuriesClass 4 · LimitedFinal reportMorris Bradley D Zenith Stol CH-701 · Hendersonville, NCThe pilot’s failure to maintain directional control during takeoff, which resulted in a runway excursion and impact with trees.NTSB ERA26LA131Accident · No injuriesClass 4 · LimitedFinal reportCessna 150L · Okeechobee, FLThe pilot’s failure to maintain airplane control during takeoff, which resulted in a runway excursion and collision with terrain.NTSB ERA26LA132Accident · Minor injuriesClass 4 · LimitedFinal reportCessna 172L · Bennettsville, SCThe pilot’s failure to maintain clearance from trees on takeoff from a rural road.NTSB ERA26LA122Accident · Minor injuriesClass 4 · LimitedFinal reportHughes 269A · Gettysburg, PAThe flight instructor’s failure to identify the excess power required to lift off from soft and muddy ground, which resulted in a loss of control and subsequent collision with a hangar during takeoff.NTSB ERA26LA119Accident · No injuriesClass 4 · LimitedFinal reportTabor W Coates AR-1 · Kissimmee, FLThe pilot’s failure to obtain the proper rotor rpm during the takeoff roll which resulted in a loss of control.NTSB ERA26LA117Accident · No injuriesClass 4 · LimitedFinal reportBeech V35 · Gulf Shores, ALThe pilot’s failure to establish a positive rate of climb before retracting the landing gear, which resulted in abnormal runway contact during the takeoff roll.NTSB CEN26LA116Accident · No injuriesClass 4 · LimitedFinal reportBeech C90 · Guymon, OKThe collision with a white-tailed deer during the takeoff in night visual conditions.NTSB WPR26LA102Accident · No injuriesClass 4 · LimitedFinal reportCessna 172M · Nampa, IDThe pilot’s failure to verify that the seat locking pins were fully engaged before takeoff, which allowed the seat to slide aft during the takeoff roll and resulted in a loss of directional control.NTSB CEN26LA105Accident · Minor injuriesClass 4 · LimitedFinal reportCessna 441 · Pflugerville, TXThe pilot’s failure to maintain airplane control during a rejected takeoff due to a flat nose wheel tire which resulted in a runway excursion and impact with terrain. Contributing to the accident was pilot fatigue which delayed the rejected takeoff.NTSB CEN26LA104Accident · No injuriesClass 4 · LimitedFinal reportTextron 172S · Augusta, KSThe student pilot’s failure to maintain control during the takeoff.