NTSB investigations, TN
522 cases where the phase of flight was Enroute.
Cases per year
| 1964 | 12 |
|---|---|
| 1965 | 7 |
| 1966 | 16 |
| 1967 | 12 |
| 1968 | 14 |
| 1969 | 17 |
| 1970 | 15 |
| 1971 | 17 |
| 1972 | 14 |
| 1973 | 15 |
| 1974 | 10 |
| 1975 | 14 |
| 1976 | 17 |
| 1977 | 6 |
| 1978 | 8 |
| 1979 | 10 |
| 1980 | 10 |
| 1981 | 12 |
| 1982 | 8 |
| 1983 | 11 |
| 1984 | 16 |
| 1985 | 9 |
| 1986 | 12 |
| 1987 | 5 |
| 1988 | 11 |
| 1989 | 9 |
| 1990 | 7 |
| 1991 | 9 |
| 1992 | 9 |
| 1993 | 10 |
| 1994 | 8 |
| 1995 | 11 |
| 1996 | 7 |
| 1997 | 9 |
| 1998 | 6 |
| 1999 | 6 |
| 2000 | 4 |
| 2001 | 5 |
| 2002 | 7 |
| 2003 | 8 |
| 2004 | 3 |
| 2005 | 10 |
| 2006 | 4 |
| 2007 | 6 |
| 2008 | 5 |
| 2009 | 3 |
| 2010 | 3 |
| 2011 | 4 |
| 2012 | 3 |
| 2013 | 1 |
| 2014 | 6 |
| 2015 | 7 |
| 2016 | 7 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 6 |
| 2020 | 2 |
| 2021 | 5 |
| 2022 | 6 |
| 2023 | 6 |
| 2024 | 7 |
| 2025 | 7 |
| 2026 | 3 |
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\" = 'TN' AND c.\"eventCountry\" = 'USA'
AND c.\"mKey\" IN (SELECT case_mkey FROM case_phases WHERE main = 400)
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" = 'TN' AND c."eventCountry" = 'USA'
AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 400)
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 ERA26LA257Accident · No injuriesClass 3 · LimitedPreliminary reportCirrus Design SR22 · Lafayette, TNOn July 2, 2026, at 1032 central daylight time, a Cirrus Design Corp SR22, N127DC, was substantially damaged when it was involved in an accident near Lafayette, Tennessee. The pilot and passenger sustained no injuries. The airplane was operated as a Title 14…NTSB ERA26LA127Accident · No injuriesClass 3 · LimitedPreliminary reportPiper PA-28-151 · Arno, TNOn February 24, 2026, about 1107 central standard time, a Piper PA-28-151, N85RW, was substantially damaged when it was involved in an accident near Arno, Tennessee. The pilot was not injured. The airplane was operated as a 14 Code of Federal Regulations Part…NTSB ERA26LA093Accident · Minor injuriesClass 3 · LimitedPreliminary reportCessna 177 · Ocoee, TNOn January 13, 2026, about 1530 eastern standard time, a Cessna 177B, N34959, was substantially damaged when it was involved in an accident near Ocoee, Tennessee. The pilot received minor injuries. The airplane was operated as a Title 14 Code of Federal…NTSB ERA25LA346Accident · Minor injuriesClass 3 · LimitedPreliminary reportPiper PA-24-180 · Ashland City, TNOn September 5, 2025, at 1645 central daylight time, N5759P, a Piper Cherokee PA-24-180, sustained substantial damage when it was involved in an accident near Ashland City, Tennessee. The private pilot sustained minor injuries. The flight was conducted as a…NTSB ERA25FA253Accident · 1 fatalClass 3 · FieldPreliminary reportErcoupe 415 · Gallatin, TNOn July 2, 2025, about 1300 central daylight time, an Ercoupe 415-C, N93985, was substantially damaged when it was involved in an accident near Gallatin, Tennessee. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal…NTSB DCA25LA239Accident · Serious injuriesClass 4 · LimitedFinal reportAirbus A320 · Nashville, TNThe airplane’s encounter with moderate convective turbulence during descent.NTSB ERA25LA227Accident · No injuriesClass 3 · LimitedPreliminary reportCirrus Design SR22 · Hartsville, TNOn June 12, 2025, about 1750 central daylight time, a Cirrus SR22, N312DA, was substantially damaged when it was involved in an accident near Hartsville, Tennessee. The private pilot was not injured. The airplane was operated as a Title 14 Code of Federal…NTSB DCA25LA197Accident · No injuriesClass 4 · LimitedFinal reportBoeing 737 · Centerville, TNAn encounter with hail during descent.NTSB WPR25FA126Accident · 3 fatalClass 3 · FieldPreliminary reportMooney M20F · Reliance, TNOn April 11, 2025, about 1402 eastern daylight time, a Mooney M20F, N7026V, sustained substantial damage when it was involved in an accident near Reliance, Tennessee. The pilot, pilot-rated passenger and passenger were fatally injured. The airplane was…NTSB ERA25LA114Accident · No injuriesClass 3 · LimitedFinal reportCessna 172P · Clarksville, TNThe flight instructor’s inadequate preflight inspection of the airplane, which allowed the partially secured engine cowl to separate in flight.NTSB ERA25FA037Accident · 1 fatalClass 3 · FieldFinal reportCessna 150F · Wilder, TNThe student pilot’s decision to continue the visual flight rules flight into instrument meteorological conditions at night, which resulted in controlled flight into terrain.NTSB ERA24FA217Accident · 3 fatalClass 3 · FieldFinal reportBeech V35 · Franklin, TNThe pilot’s flight into convective weather, which resulted in a loss of control due to spatial disorientation and a subsequent inflight breakup of the airplane. Contributing to the accident was the lack of accurate weather intensity depiction on the…NTSB ERA24FA176Accident · 1 fatalClass 3 · FieldFinal reportPiper PA-32R-301 · Knoxville, TNThe pilot’s decision to depart into an area of instrument meteorological and icing conditions, which resulted in loss of airplane control and a subsequent in-flight breakup.NTSB DCA24LA130Accident · Serious injuriesClass 4 · LimitedFinal reportBoeing 737-800 · Paris, TNAn encounter with convective turbulence.NTSB ERA24LA095Accident · No injuriesClass 3 · LimitedFinal reportCessna 210D · Paris, TNThe disruption of torque to the No 4 connecting rod journals, which resulted in a spun bearing and the subsequent total loss of engine power.NTSB ERA24LA087Accident · No injuriesClass 3 · LimitedFinal reportCessna 150 · Hohenwald, TNThe pilot’s failure to use carburetor heat in conditions conducive to the formation of carburetor ice, which resulted in a partial loss of engine power due to fuel starvation. Contributing to the outcome was her failure to attain a proper touchdown point…NTSB ERA24LA082Accident · No injuriesClass 3 · LimitedFinal reportMooney M20K · Tullahoma, TNA total loss of engine power for undetermined reasons.NTSB ERA24LA076Accident · No injuriesClass 3 · LimitedFinal reportBell Helicopter Textron 206L-1 · Walland, TNThe improper installation of the No. 8 bearing spanner nut, which resulted in the No. 8 bearing’s failure, and the subsequent total loss of engine power.NTSB ERA24FA058Accident · 2 fatalClass 3 · FieldFinal reportBeech 35-C33 · Pulaski, TNThe pilot’s failure to maintain airplane control, which resulted in pilot-induced oscillations and a subsequent loss of control and impact with terrain.NTSB ERA23LA372Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 182P · Prospect, TNA loss of engine power due to the fatigue failure of the No. 6 cylinder exhaust valve rocker boss.NTSB ERA23LA361Accident · No injuriesClass 3 · LimitedFinal reportBeech V35 · Rutledge, TNA total loss of engine power due to the fatigue failure of a retaining circlip in one of the No. 2 crankshaft cheek counterweights, which resulted in liberation of the counterweight.NTSB ERA23LA264Accident · Minor injuriesClass 3 · LimitedFinal reportPiper PA28 · Lancaster, TNThe fatigue failure of an exhaust valve, resulting in a partial loss of engine power.NTSB ERA23FA219Accident · 1 fatalClass 3 · FieldFinal reportCessna 182 · Reliance, TNThe pilot’s decision to continue an instrument flight into an area of forecast weather with severe to extreme turbulence associated with a line of thunderstorms, which resulted in an in-flight breakup. Contributing was the pilot’s operation of the airplane in…NTSB ERA23LA059Accident · No injuriesClass 3 · LimitedFinal reportAmerican AA-1A · Sparta, TNA total loss of engine power due to an accumulation of carburetor ice, resulting in an off-airport landing and substantial damage to the airplane.NTSB ERA23FA025Accident · 1 fatalClass 3 · FieldFinal reportPiper PA-32-300 · Brentwood, TNA total loss of engine power due to the catastrophic failure of the crankshaft resulting from the improper installation of the crankshaft for this application.NTSB CEN22FA406Accident · 2 fatalClass 3 · FieldFinal reportCessna 182 · Cleveland, TNThe pilot’s loss of airplane control while operating in instrument meteorological conditions.NTSB CEN22FA217Accident · 1 fatalClass 3 · FieldFinal reportCessna 162 · Memphis, TNPilot incapacitation due to an acute cardiac event.NTSB ERA22LA249Accident · Minor injuriesClass 3 · LimitedFinal reportAeronca 7AC · Melrose, TNA total loss of engine power due to carburetor icing.NTSB ERA22LA139Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 152 · Madisonville, TNA partial loss of engine power for undetermined reasons.NTSB ERA22FA096Accident · 1 fatalClass 3 · FieldFinal reportRobinson Helicopter R44 II · Cosby, TNThe pilot’s intentional, continued flight into instrument meteorological conditions in a helicopter that was not certified for instrument conditions, which resulted in a loss of helicopter control and a collision with trees and terrain.NTSB ERA22LA037Accident · No injuriesClass 3 · LimitedFinal reportPiper PA-30 · Waverly, TNThe pilot’s improper pre-flight fuel planning, which resulted in a total loss of engine power to both engines due to fuel exhaustion.NTSB ERA21FA263Accident · 1 fatalClass 3 · FieldFinal reportCirrus SR22 · Mercer, TNA partial loss of engine power due to foreign object debris contamination of the left turbocharger wastegate. Contributing to the accident was the pilot’s failure to divert to the nearest airport.NTSB ERA21FA232Accident · 1 fatalClass 3 · FieldFinal reportGulfstream American AA-5A · Crossville, TNA partial loss of engine power due to carburetor icing, which resulted in a descent and impact with terrain. Contributing to the accident was the pilot’s failure to apply carburetor heat following the initial loss of engine power.NTSB ERA21FA189Accident · 2 fatalClass 3 · FieldFinal reportPiper PA-28RT-201T · Brownsville, TNThe student pilot’s continued visual flight rules flight into night instrument meteorological conditions, which resulted in spatial disorientation and a rapid uncontrolled descent into terrain. Contributing to the accident were the self-induced and external…NTSB ERA20LA313Accident · 1 fatalClass 3 · LimitedFinal reportBeech A36 · Jackson, TNThe pilot’s inadequate preflight fuel planning, which resulted in a total loss of engine power due to fuel exhaustion. Contributing to the accident was the pilot's impairment due to alcohol.NTSB ERA20CA222Accident · No injuriesClass 4 · Data collectionFinal reportBeech 77 · Elizabethton, TNThe student pilot's decision to continue from visual flight into instrument meteorological conditions, which resulted in a collision with trees and mountainous terrain.NTSB ERA20CA090Accident · No injuriesClass 4 · Data collectionFinal reportPitts A · Hickory Valley, TNThe pilot’s improper fuel planning which resulted in a total loss of engine power due to fuel exhaustion.NTSB ANC19LA036Accident · Serious injuriesClass 3 · LimitedFinal reportStoddard Hamilton Glasair II · Chattanooga, TNThe pilot's failure to switch to the secondary electrical system after the primary electrical system failed for unknown reasons.NTSB ERA19LA228Accident · No injuriesClass 3 · LimitedFinal reportPietenpol BIG Piet · Gainesboro, TNSeparation of the spinner cap for reasons that could not be determined based on available evidence, which resulted in contact and subsequent separation of the wooden propeller blade tip.NTSB CEN19LA175Accident · Minor injuriesClass 3 · LimitedFinal reportFlightstar FC-II · Knoxville, TNA total loss of engine power for reasons that could not be determined based on available evidence.NTSB ERA19LA177Accident · No injuriesClass 3 · LimitedFinal reportZenith CH750 · Savannah, TNThe total loss of engine power due to a loss of all electrical power. Contributing to the accident was the inaccessible placement of the alternator circuit breaker and the construction of the airplane without a backup electrical source.NTSB DCA19CA091Accident · Serious injuriesClass 4 · Data collectionFinal reportBoeing 737 · Franklin, TNan encounter with convective turbulence during descent.NTSB DCA19CA005Accident · Serious injuriesClass 4 · Data collectionFinal reportBoeing 737 · Nashville, TNflight attendant tripping over a passenger's knee that resulted in hot liquid splashing on the flight attendant.NTSB ERA18LA113Accident · No injuriesLimited investigationFinal reportFairchild Funk M62C F 23A · Columbia, TNThe pilot's inadvertent selection of the fuel selector handle to the off position, which resulted in fuel starvation and a total loss of engine power.NTSB ANC18FA022Accident · 1 fatalField investigationFinal reportBeech 35 A33 · Helenwood, TNThe pilot's mismanagement of the available fuel, which resulted in a total loss of engine power due to fuel starvation. Contributing to the accident was the pilot's failure to follow the air start checklist.NTSB ERA17LA326Accident · No injuriesLimited investigationFinal reportAir Tractor AT 502 · Union City, TNThe catastrophic failure of the compressor turbine blades, which resulted in a total loss of engine power. Contributing to the accident was the installation of undocumented, time-limited engine components of indeterminate age.NTSB DCA17LA183Accident · Serious injuriesClass 3 · LimitedFinal reportBombardier CL 600 2C10 · McKellar, TNAn encounter with convective turbulence while maneuvering to avoid conflicting traffic.NTSB ERA17FA073Accident · 3 fatalField investigationFinal reportCessna 182 · Gatlinburg, TNThe non-instrument-rated pilot's intentional visual flight rules flight into instrument meteorological conditions, which resulted in controlled flight into terrain. Contributing to the accident was the pilot's established anti-authority attitude.NTSB ERA17CA012Accident · Minor injuriesData collectionFinal reportBellanca 8KCAB · Knoxville, TNThe pilot's intentional low-altitude operation, which resulted in his failure to maintain clearance from unmarked utility wires.NTSB ERA17LA019Accident · No injuriesLimited investigationFinal reportCessna 182 · Toone, TNA stuck No. 3 cylinder exhaust valve, which resulted in failure of the cylinder's valvetrain components, breach of the cylinder's rocker box cover, and partial loss of engine power due to oil starvation.