NTSB investigations, OK
370 cases where the phase of flight was Maneuvering.
Cases per year
| 1964 | 18 |
|---|---|
| 1965 | 7 |
| 1966 | 10 |
| 1967 | 5 |
| 1968 | 8 |
| 1969 | 7 |
| 1970 | 7 |
| 1971 | 13 |
| 1972 | 2 |
| 1973 | 8 |
| 1974 | 8 |
| 1975 | 5 |
| 1976 | 10 |
| 1977 | 15 |
| 1978 | 7 |
| 1979 | 11 |
| 1980 | 11 |
| 1981 | 9 |
| 1982 | 9 |
| 1983 | 11 |
| 1984 | 10 |
| 1985 | 4 |
| 1986 | 9 |
| 1987 | 6 |
| 1988 | 4 |
| 1989 | 7 |
| 1990 | 7 |
| 1991 | 7 |
| 1992 | 11 |
| 1993 | 6 |
| 1994 | 4 |
| 1995 | 6 |
| 1996 | 4 |
| 1997 | 6 |
| 1998 | 7 |
| 1999 | 3 |
| 2000 | 7 |
| 2001 | 3 |
| 2002 | 5 |
| 2003 | 4 |
| 2004 | 7 |
| 2005 | 2 |
| 2006 | 2 |
| 2007 | 5 |
| 2008 | 6 |
| 2009 | 4 |
| 2010 | 4 |
| 2011 | 4 |
| 2012 | 4 |
| 2013 | 5 |
| 2014 | 2 |
| 2015 | 3 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 4 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 2 |
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.\"eventStateOrRegion\" = 'OK' AND c.\"eventCountry\" = 'USA'
AND c.\"mKey\" IN (SELECT case_mkey FROM case_phases WHERE main = 450)
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" = 'OK' AND c."eventCountry" = 'USA'
AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 450)
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 WPR26LA277Accident · Serious injuriesClass 4 · LimitedFinal reportBell 206B III · Stonewall, OKThe pilot’s failure to maintain clearance from power lines while conducting a low-altitude aerial application.NTSB CEN26LA175Accident · No injuriesClass 3 · LimitedPreliminary reportHiller UH-12E · Chickasha, OKOn April 30, 2026, about 1730 central daylight time, a Hiller UH-12E, N22SP, was substantially damaged when it was involved in an accident near Chickasha, Oklahoma. The pilot was not injured. The helicopter was operated as a Title 14 Code of Federal…NTSB WPR26FA054Accident · 1 fatalClass 3 · FieldPreliminary reportHughes 369D · Pryor, OKOn December 5, 2025, about 0858 central standard time, a Hughes 369D, N161LA, was substantially damaged when it was involved in an accident near Pryor, Oklahoma. The pilot was fatally injured. The helicopter was operated as a Title 14 Code of Federal…NTSB CEN24LA104Accident · No injuriesClass 3 · LimitedFinal reportPiper PA24 · Cherokee, OKA partial loss of engine power for reasons that could not be determined. Contributing to the accident was the presence of ground fog, which hindered the landing approach and resulted in the pilot inadvertently landing long and impacting a fence during the…NTSB CEN23LA226Accident · Serious injuriesClass 3 · LimitedFinal reportTemco GC-1B · Bristow, OKThe loss of engine power due to carburetor ice due to the pilot’s delayed application of carburetor heat.NTSB CEN23LA147Accident · Minor injuriesClass 4 · LimitedFinal reportBell OH-58A · Wade, OKThe total loss of engine power due to fuel contamination.NTSB CEN23FA079Accident · 2 fatalClass 3 · FieldFinal reportPiper PA-32-301T · Kingfisher, OKAn oil leak of undetermined origin that resulted in an in-flight engine compartment fire and subsequent loss of airplane control.NTSB CEN22LA395Accident · Serious injuriesClass 4 · LimitedFinal reportBoeing A75N1(PT17) · Prue, OKThe pilot’s failure to maintain clearance from power lines during intentional low-level maneuvering.NTSB CEN22LA321Accident · 2 fatalClass 3 · LimitedFinal reportJust Highlander · Bennington, OKThe pilot’s exceedance of the airplane’s critical angle of attack which resulted in an aerodynamic stall and loss of control.NTSB CEN22FA053Accident · 1 fatalClass 3 · FieldFinal reportBell 206 · Perry, OKA loss of lateral control during a hover that resulted in an impact with terrain. Based on the available evidence, the reason for the loss of lateral control could not be determined.NTSB CEN21FA314Accident · 1 fatalClass 3 · FieldFinal reportPZL Mielec M18 · Seiling, OKThe pilot’s in-flight loss of control due to the structural failure of a wing fitting and separation of the outboard wing section. Also causal were the inadequate wing fitting inspections, which failed to detect the initial corrosion and crack before it…NTSB CEN21LA216Accident · No injuriesClass 3 · LimitedFinal reportAerospatiale AS350 B2 Ecureuil · Yukon, OKThe pilot receiving instruction’s untimely and unidentified inadvertent activation of the hydraulic cut-off switch, which turned off the hydraulic system while the helicopter was at slow airspeed followed by a rapid power increase, which resulted in a loss of…NTSB CEN21LA173Accident · Serious injuriesClass 3 · LimitedFinal reportRobinson Helicopter R44 II · Dustin, OKThe pilot’s insufficient monitoring of the helicopter’s power while flying at low altitude and at low airspeed, which resulted in the loss of rotor rpm and impact with a tree and terrain.NTSB CEN21LA047Accident · Serious injuriesClass 3 · LimitedFinal reportErcoupe 415 · Ardmore, OKThe pilot’s improper decision to takeoff with 3 persons in a 2-place airplane and over maximum gross weight, and his failure to apply carburetor heat when the airplane’s engine experienced carburetor ice and a partial loss of power.NTSB CEN20CA229Accident · Serious injuriesClass 4 · Data collectionFinal reportCessna T188 · McCurtain, OKThe pilot's failure to maintain the proper airspeed during a low altitude aerial application maneuver and his exceedance of the airplane’s critical angle of attack, which resulted in an aerodymanic stall at too low of an altiutde to recover.NTSB ERA19LA006Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 205 · Wagoner, OKMaintenance personnel’s improper maintenance of the magnetos, which resulted in a loss of engine power.NTSB CEN18FA310Accident · 5 fatalClass 3 · FieldFinal reportExtra EA 400 · Ponca City, OKThe pilot's loss of control for reasons that could not be determined with the available evidence.NTSB CEN18FA232Accident · 1 fatalClass 2 · FieldFinal reportAir Tractor AT 502B · Enid, OKThe pilot's failure to see and avoid a known obstacle (communications tower) during agricultural spraying operations.NTSB CEN18FA201Accident · 1 fatalField investigationFinal reportAyres S2R · El Reno, OKThe pilot's failure to maintain clearance from tower guy wires while maneuvering during an aerial application flight.NTSB CEN17CA120Accident · Serious injuriesData collectionFinal reportAero Commander S2R · Fairmont, OKThe pilot’s failure to maintain clearance from a power line while conducting agricultural spray operations.NTSB CEN16FA278Accident · 2 fatalField investigationFinal reportHarris-Runyan Skybolt 300 · Fairmont, OKThe pilot's delay in recovering from an aerobatic maneuver resulting in collision with terrain.NTSB CEN15LA437Accident · Minor injuriesLimited investigationFinal reportCapella Aircraft Corporation ( FW2TDXLS · Bartlesville, OKThe pilot’s failure to maintain airplane control after takeoff.NTSB CEN15LA238Accident · No injuriesLimited investigationFinal reportPiper PA-25-235 · Omega, OKImproper base metal preparation or contamination of the No. 5 cylinder wall before it was coated, which resulted in the coating peeling off of the cylinder wall and contaminating the engine oil and the subsequent partial loss of engine power.NTSB CEN15FA127Accident · 1 fatalField investigationFinal reportEagleston John H Vans RV9A · Kingston, OKThe pilot’s continuation of a banked turn following the loss of engine power, which resulted in his failure to maintain adequate airspeed and the airplane exceeding its critical angle of attack and entering an accelerated stall at low altitude. Contributing…NTSB CEN14FA506Accident · 1 fatalField investigationFinal reportCessna 172R · Okmulgee, OKThe pilot's continued visual flight into instrument meteorological conditions, which resulted in his failure to maintain clearance with trees and terrain.NTSB CEN14LA319Accident · Minor injuriesLimited investigationFinal reportGrumman G 164 · Anadarko, OKThe total loss of engine power while climbing after takeoff for reasons that could not be determined based on the available information.NTSB CEN14FA046Accident · 1 fatalField investigationFinal reportMitsubishi MU 2B-25 · Owasso, OKThe pilot's loss of airplane control during a known one-engine-inoperative condition. The reasons for the loss of control and engine shutdown could not be determined because the airplane was not equipped with a crash-resistant recorder and postaccident…NTSB CEN14FA019Accident · 1 fatalField investigationFinal reportPiper PA 28-140 · Talihina, OKThe pilot’s lack of weather planning and his continued flight into an area of known rain with reduced visibility and his subsequent failure to maintain clearance with trees.NTSB CEN13TA441Accident · Serious injuriesFinal reportCessna 182S · Tecumseh, OKThe pilot's inadvertent aerodynamic stall at a low altitude, which resulted in a loss of control and impact with terrain.NTSB CEN13LA390Accident · No injuriesLimited investigationFinal reportRockwell S-2R · Boise City, OKThe total loss of engine power for reasons that could not be determined because postaccident examination of the engine and fuel system revealed no anomalies.NTSB CEN13LA322Accident · No injuriesLimited investigationFinal reportGrumman Acft ENG Cor-Schweizer G-164B · Covington, OKThe airplane’s failure to climb after takeoff for reasons that could not be determined because postaccident examinations of the engine and airframe did not reveal any anomalies that would have precluded normal operation.NTSB CEN13FA051Accident · 1 fatalField investigationFinal reportPiper PA-28-140 · Anadarko, OKThe pilot’s use of excessive bank angle while maneuvering in the airport traffic pattern, which resulted in an accelerated stall.NTSB CEN12CA533Accident · No injuriesData collectionFinal reportThrush S-2R · Newkirk, OKThe pilot’s failure to maintain clearance from power lines.NTSB CEN12LA299Accident · No injuriesLimited investigationFinal reportPiper PA-24-250 · Shawnee, OKThe improper installation of the mixture cable by maintenance personnel, which allowed the mixture cable to entangle with the landing gear during gear extension and led to the subsequent loss of engine power.NTSB CEN12CA269Accident · No injuriesData collectionFinal reportEurocopter AS 350 B2 · Hugo, OKThe pilot’s inadequate collective control inputs while performing a hovering autorotation, which resulted in a hard landing. Contributing to the accident was the check airman's delayed remedial action.NTSB CEN12FA101Accident · 2 fatalField investigationFinal reportPiper PA-28-235D · Chickasha, OKThe non-instrument-rated pilot's decision to continue flight into instrument meteorological conditions, which resulted in the pilot’s spatial disorientation and loss of control of the airplane. Contributing to the accident was the pilot’s lack of instrument…NTSB CEN11CA509Accident · No injuriesData collectionFinal reportBell 206B · Temple, OKThe pilot’s failure to maintain clearance from static power lines.NTSB CEN11LA350Accident · Serious injuriesLimited investigationFinal reportPiper PA-22-160 · Frederick, OKAn in-flight fire for undetermined reasons.NTSB CEN11FA300Accident · 1 fatalField investigationFinal reportDahlman-Dower Tailwind W-8 · Elk City, OKThe pilot's decision to attempt flight into instrument meteorological conditions in an airplane that was equipped for flight in visual meteorological conditions only, which resulted in the pilot’s spatial disoriented and loss of control of the airplane.NTSB CEN11LA082Accident · 1 fatalLimited investigationFinal reportCessna 172M · Velma, OKThe pilot’s failure to maintain control of the airplane while maneuvering, which resulted in an inadvertent stall and subsequent impact with terrain. Contributing to the accident was the pilot's relative inexperience in pipeline patrols.NTSB CEN11FA075Accident · 1 fatalField investigationFinal reportHawker-Beechcraft A36 · Oklahoma City, OKThe pilot’s loss of control of the airplane during night instrument meteorological conditions, likely due to spatial disorientation.NTSB CEN10FA424Accident · 2 fatalField investigationFinal reportEurocopter AS 350 B2 · Kingfisher, OKThe pilot’s impaired judgment, due to medications, which led to an abrupt low-level maneuver and subsequent impact with trees and terrain.NTSB CEN10FA130Accident · 2 fatalField investigationFinal reportBeech C24R · Bristow, OKThe pilot’s loss of control for undetermined reasons while maneuvering at low altitude.NTSB CEN10LA043Accident · 2 fatalLimited investigationFinal reportMoore Skybolt/BM · Altus, OKThe pilot's poor judgment by performing intentional low-level maneuvers that resulted in an inadvertent stall/spin at an altitude to low to affect a safe recovery.NTSB CEN09FA562Accident · 5 fatalField investigationFinal reportPiper PA-32R-300 · Tulsa, OKThe non-instrument-rated pilot’s decision to attempt flight in instrument meteorological conditions, which resulted in spatial disorientation and an in-flight collision with a radio tower guy wire.NTSB CEN09CA479Accident · Serious injuriesData collectionFinal reportPiper PA28-151 · Purcell, OKThe student pilot's failure to see and avoid the power lines.NTSB CEN09CA287Accident · Serious injuriesData collectionFinal reportPitts Aerobatics S-2B · Muskogee, OKInadequate supervision by the certified flight instructor, resulting in a delayed stall recovery attempt.NTSB DFW08FA237Accident · 2 fatalField investigationFinal reportCessna 320D · Collinsville, OKThe crews' failure to maintain adequate airspeed, which resulted in an aerodynamic stall close to the ground.NTSB DEN08LA163Accident · Minor injuriesLimited investigationFinal reportBeech C23 · Duncan, OKA total loss of engine power due to the fatigue failure of the engine crankshaft. Contributing to the accident were the improper maintenance to the engine crankshaft, improper reassembly of the engine, and failure to follow the engine manufacturer's overhaul…NTSB DFW08CA171Accident · Minor injuriesData collectionFinal reportMooney M20 · Lake Ft Gibson, OKThe pilot's loss of control while maneuvering the aircraft.