# NTSB investigations, KS: Approach

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

Page 1 of 8 · 356 cases

## Latest cases

- [NTSB CEN25LA370](https://openairdocs.org/ntsb/CEN25LA370.md): Boeing E75 · Benton, KS · Accident · No injuries · Class 4 · Limited · Final report · Sep 7, 2025 · N75675 · Substantial damage
  > The pilot's failure to maintain clearance from a moving vehicle during an evasive maneuver from a perceived conflict with another airplane. Contributing to the accident was the pilot of the other airplane’s non-standard phraseology and inaccurate position…
- [NTSB CEN25LA208](https://openairdocs.org/ntsb/CEN25LA208.md): Beech E90 · New Century, KS · Accident · Minor injuries · Class 4 · Limited · Final report · Jun 16, 2025 · N1UC · Substantial damage
  > The flight instructor’s inadequate fuel planning that resulted in a loss of engine power to the left engine due to fuel exhaustion. Contributing to the accident was the flight instructor’s inadequate supervision of the flight that resulted in diminished…
- [NTSB CEN25LA064](https://openairdocs.org/ntsb/CEN25LA064.md): Cozy Cub · Parsons, KS · Accident · Serious injuries · Class 4 · Limited · Final report · Dec 28, 2024 · N719LB · Substantial damage
  > The pilot’s failure to maintain clearance from power lines while on final approach to land.
- [NTSB CEN24LA019](https://openairdocs.org/ntsb/CEN24LA019.md): Cessna 172C · Wichita, KS · Accident · No injuries · Class 4 · Limited · Final report · Oct 20, 2023 · N1413Y · Substantial damage
  > The pilot’s inadequate preflight inspection and fuel planning and improper in-flight decision-making, which resulted in a total loss of engine power due to fuel exhaustion.
- [NTSB CEN23LA237](https://openairdocs.org/ntsb/CEN23LA237.md): Bell 206B · Pratt, KS · Accident · Minor injuries · Class 4 · Limited · Final report · Jun 11, 2023 · N85RB · Substantial damage
  > Fuel exhaustion due to the pilot’s inadequate preflight planning.
- [NTSB CEN23LA012](https://openairdocs.org/ntsb/CEN23LA012.md): Piper PA-32-300 · Paola, KS · Accident · Minor injuries · Class 3 · Limited · Final report · Oct 12, 2022 · N4171W · Substantial damage
  > The pilot’s improper positioning of the fuel selector, which resulted in fuel starvation and a loss of engine power during a departure climb.
- [NTSB CEN22LA279](https://openairdocs.org/ntsb/CEN22LA279.md): Let L-23 Super Blanik · Yoder, KS · Accident · Serious injuries · Class 4 · Limited · Final report · Jun 22, 2022 · N364BA · Substantial damage
  > The pilot's encounter with sinking air conditions that resulted in a loss of lift and a subsequent loss of control.
- [NTSB CEN22LA181](https://openairdocs.org/ntsb/CEN22LA181.md): Cessna 172M · Manhattan, KS · Accident · Minor injuries · Class 3 · Limited · Final report · Apr 21, 2022 · N9263H · Substantial damage
  > The pilot’s failure to use carburetor heat during the approach and his unsuitable flight profile for an upsloping runway, which resulted in a partial loss of engine power and an impact with terrain during an attempted go-around.
- [NTSB CEN21LA302](https://openairdocs.org/ntsb/CEN21LA302.md): Piper Aerostar 600A · Wichita, KS · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 2, 2021 · N10HK · Substantial damage
  > The pilot’s improper fuel planning and management, which resulted in a total loss of engine power due to fuel exhaustion.
- [NTSB CEN21LA175](https://openairdocs.org/ntsb/CEN21LA175.md): Piper PA-28-140 · Augusta, KS · Accident · No injuries · Class 3 · Limited · Final report · Apr 1, 2021 · N7274F · Substantial damage
  > Inadequate maintenance at the time the carburetor was replaced, which resulted in the improperly installed throttle cable and a partial loss of engine power. Contributing to the accident was an inadequate annual inspection that failed to detect the improper…
- [NTSB CEN19FA189](https://openairdocs.org/ntsb/CEN19FA189.md): Beechcraft 58 · Hiawatha, KS · Accident · 1 fatal · Field investigation · Final report · Jun 28, 2019 · N4614S · Destroyed
  > The pilot's loss of control for undetermined reasons.
- [NTSB CEN19LA111](https://openairdocs.org/ntsb/CEN19LA111.md): Cessna 140 · Newton, KS · Accident · No injuries · Class 3 · Limited · Final report · Mar 26, 2019 · N76268 · Substantial damage
  > The loss of engine power after the No. 1 connecting rod end separated as a result of oil starvation, which led to the forced landing and nose-over.
- [NTSB CEN18LA246](https://openairdocs.org/ntsb/CEN18LA246.md): Cessna 337 · Baldwin City, KS · Accident · No injuries · Limited investigation · Final report · Jun 30, 2018 · N107BL · Substantial damage
  > The loss of hydraulic accumulator pressure for reasons that could not be determined, which prevented the propeller from unfeathering, and the pilot's improper decision to attempt a go-around, which resulted in an off-airport landing and the airplane impacting…
- [NTSB CEN18LA230](https://openairdocs.org/ntsb/CEN18LA230.md): Cessna TR182 · Beloit, KS · Accident · No injuries · Limited investigation · Final report · Jun 18, 2018 · N756SW · Substantial damage
  > The mechanic’s failure to properly torque one of the left brake caliper’s back plate attachment bolts while re-installing it during the annual inspection, which resulted in the left main landing gear not extending before landing.
- [NTSB CEN18LA197](https://openairdocs.org/ntsb/CEN18LA197.md): Fairchild M 62C(PT-23A) · Wichita, KS · Accident · Minor injuries · Limited investigation · Final report · May 28, 2018 · N64176 · Substantial damage
  > A total loss of engine power due to fuel exhaustion, which resulted from the pilot’s miscalculation of the fuel consumption rate during preflight planning.
- [NTSB GAA17CA489](https://openairdocs.org/ntsb/GAA17CA489.md): Cessna 170 · Axtell, KS · Accident · No injuries · Data collection · Final report · Aug 11, 2017 · N4189V · Substantial damage
  > The pilot's exceedance of the airplane's critical angle of attack during a go-around. Contributing to the accident was the pilot's decision to attempt to close a passenger door during a critical phase of flight.
- [NTSB CEN17FA297](https://openairdocs.org/ntsb/CEN17FA297.md): Piper PA30 · Topeka, KS · Accident · 2 fatal · Field investigation · Final report · Aug 1, 2017 · N22HW · Destroyed
  > The failure of the pilot and flight instructor to maintain aircraft control while maneuvering in the traffic pattern.
- [NTSB CEN16LA230](https://openairdocs.org/ntsb/CEN16LA230.md): Glaeser Nieuport 11 · Gardner, KS · Accident · No injuries · Limited investigation · Final report · Jun 18, 2016 · N124TG · Substantial damage
  > The pilot's diverted attention during the approach for the precautionary landing, which resulted in low airspeed, an exceedance of the airplane’s critical angle of attack, and a subsequent aerodynamic stall. Contributing to the accident was the control system…
- [NTSB CEN16LA129](https://openairdocs.org/ntsb/CEN16LA129.md): Mooney M20C · Wichita, KS · Accident · Minor injuries · Limited investigation · Final report · Mar 18, 2016 · N9262M · Substantial damage
  > The total loss of engine power due to fuel starvation, which resulted from the pilot's improper fuel management.
- [NTSB CEN16LA093](https://openairdocs.org/ntsb/CEN16LA093.md): Socata TBM700 · Wichita, KS · Accident · No injuries · Limited investigation · Final report · Jan 19, 2016 · N602MA · Substantial damage
  > The pilot’s failure to maintain the minimum-recommended approach airspeed in icing conditions, which resulted in a loss of airplane control.
- [NTSB CEN15LA431](https://openairdocs.org/ntsb/CEN15LA431.md): Edward M Van Morlan Rans S-12 · Gardner, KS · Accident · Serious injuries · Limited investigation · Final report · Sep 28, 2015 · N98ES · Substantial damage
  > The pilot's inadequate airspeed control and the airplane’s exceedance of its critical angle-of-attack during the forced landing, which resulted in an aerodynamic stall. Contributing to the accident was the loss of engine power due to fuel starvation caused by…
- [NTSB GAA15CA178](https://openairdocs.org/ntsb/GAA15CA178.md): Piper PA 24-250 · Newton, KS · Accident · No injuries · Data collection · Final report · Jul 4, 2015 · N7985P · Substantial damage
  > The failure of the right main landing gear down-lock micro switch, which resulted in a landing gear collapse during landing, and the pilot/owner's unfamiliarity with the emergency landing gear extension procedure. Contributing to the accident was the flight…
- [NTSB CEN14CA323](https://openairdocs.org/ntsb/CEN14CA323.md): Cessna E162 · Wichita, KS · Accident · No injuries · Data collection · Final report · Jun 20, 2014 · N511ML · Substantial damage
  > The student pilot's failure to maintain adequate airspeed during the landing approach which resulted in an inadvertent stall and impact with the runway.
- [NTSB CEN14LA033](https://openairdocs.org/ntsb/CEN14LA033.md): Clevenger Jimmie B Pitts S 1S · Wellington, KS · Accident · No injuries · Limited investigation · Final report · Oct 31, 2013 · N67JC · Substantial damage
  > The loss of engine power due to a malfunctioning fuel pump.
- [NTSB CEN13CA153](https://openairdocs.org/ntsb/CEN13CA153.md): Cessna 177RG · Herington, KS · Accident · No injuries · Data collection · Final report · Feb 8, 2013 · N88NG · Substantial damage
  > The pilot’s failure to maintain adequate airspeed during the approach, which resulted in an aerodynamic stall.
- [NTSB CEN11LA575](https://openairdocs.org/ntsb/CEN11LA575.md): Cessna 150H · Sabetha, KS · Accident · Minor injuries · Limited investigation · Final report · Aug 14, 2011 · N6953S · Substantial damage
  > The pilot's failure to maintain adequate airspeed, which resulted in a stall. Contributing to the accident was the pilot's lack of certification to act as a pilot and his lack of recent experience.
- [NTSB CEN11LA466](https://openairdocs.org/ntsb/CEN11LA466.md): Dehavilland DHC-1 · Benton, KS · Accident · Serious injuries · Limited investigation · Final report · Jul 9, 2011 · N22DH · Substantial damage
  > The pilot did not maintain sufficient airspeed while maneuvering at low altitude, which resulted in an inadvertent stall and spin.
- [NTSB CEN11CA411](https://openairdocs.org/ntsb/CEN11CA411.md): Worley Dennis Sonex · Gardner, KS · Accident · No injuries · Data collection · Final report · Jun 18, 2011 · N563 · Substantial damage
  > The pilot's failure to maintain a proper glide path during the visual approach.
- [NTSB CEN11FA302](https://openairdocs.org/ntsb/CEN11FA302.md): Beech 58 · Topeka, KS · Accident · 4 fatal · Field investigation · Final report · Apr 22, 2011 · N580EA · Destroyed
  > The pilot failed to maintain control of the airplane while maneuvering in instrument meteorological conditions. Contributing to the accident was the pilot’s minimal experience flying in actual instrument conditions.
- [NTSB CEN10CA479](https://openairdocs.org/ntsb/CEN10CA479.md): Beech A23-19 · Wichita, KS · Accident · No injuries · Data collection · Final report · Aug 14, 2010 · N6919Q · Substantial damage
  > The pilot’s loss of airplane control while landing with a gusting wind.
- [NTSB CEN10CA018](https://openairdocs.org/ntsb/CEN10CA018.md): Cessna T206H · Johnson City, KS · Accident · Minor injuries · Data collection · Final report · Oct 16, 2009 · N454TG · Substantial damage
  > The pilot's delayed action in applying full power during a go-around after flying into a fog bank.
- [NTSB CEN09LA124](https://openairdocs.org/ntsb/CEN09LA124.md): Lavigna Lancair IV P · Iola, KS · Accident · Minor injuries · Limited investigation · Final report · Jan 7, 2009 · N131DL · Destroyed
  > The total loss of engine power for undetermined reasons.
- [NTSB CEN09CA038](https://openairdocs.org/ntsb/CEN09CA038.md): Beech A36 · Salina, KS · Accident · No injuries · Data collection · Final report · Oct 18, 2008 · N3112Y · Substantial damage
  > The pilot's failure to properly manage the available fuel supply, which resulted in fuel starvation and subsequent loss of engine power.
- [NTSB DEN08CA133](https://openairdocs.org/ntsb/DEN08CA133.md): Beech C23 · Augusta, KS · Accident · No injuries · Data collection · Final report · Aug 6, 2008 · N24598 · Substantial damage
  > The student pilot's failure to maintain control of the airplane. Contributing to the accident were the flight instructor's inadequate supervision, turbulence, airspeed was not maintained, and compensation for the wind conditions was inadequate.
- [NTSB DEN08LA108](https://openairdocs.org/ntsb/DEN08LA108.md): Mercer Avid Flyer Mk IV · Augusta, KS · Accident · No injuries · Limited investigation · Final report · Jun 21, 2008 · N6880L · Substantial damage
  > Failure of the engine cooling system's thermostat, causing the engine to overheat and seize. Contributing to the accident was the fence.
- [NTSB DFW08CA086](https://openairdocs.org/ntsb/DFW08CA086.md): Air Tractor At-301 · Plains, KS · Accident · No injuries · Data collection · Final report · Mar 26, 2008 · N4427S · Substantial damage
  > A loss of engine power as a result of a blocked carburetor. A factor was the lack of suitable terrain for the forced landing.
- [NTSB DEN08LA038](https://openairdocs.org/ntsb/DEN08LA038.md): Rotorway Exec 162-F · New Century, KS · Accident · No injuries · Limited investigation · Final report · Nov 13, 2007 · N46110 · Substantial damage
  > While on approach the tail rotor spar failed due to metal fatigue.
- [NTSB DEN07LA160](https://openairdocs.org/ntsb/DEN07LA160.md): Piper PA-30 · Lawrence, KS · Accident · No injuries · Limited investigation · Final report · Aug 31, 2007 · N22HW · Substantial damage
  > Total failure of the landing gear retraction/extension assembly. Contributing factors in this accident were worn parts in the landing gear retraction/extension assembly, and mechanical binding of the extension assembly.
- [NTSB DEN07CA097](https://openairdocs.org/ntsb/DEN07CA097.md): Stevenson RV-6 · Oakley, KS · Accident · Minor injuries · Data collection · Final report · Jun 1, 2007 · N836RV · Substantial damage
  > The pilot's failure to maintain airspeed during final approach resulting in a inadvertent stall and impact with terrain.
- [NTSB DEN07CA096](https://openairdocs.org/ntsb/DEN07CA096.md): Cessna 172P · Manhattan, KS · Accident · No injuries · Data collection · Final report · May 25, 2007 · N65685 · Substantial damage
  > The flight instructor's failure to maintain control of the airplane during the landing. A contributing factor was the inadvertent encounter with the military helicopter's rotor wash.
- [NTSB DEN07CA076](https://openairdocs.org/ntsb/DEN07CA076.md): Cessna 172E · Pleasanton, KS · Accident · No injuries · Data collection · Final report · Mar 16, 2007 · N5759T · Substantial damage
  > The pilot's failure to maintain control of the airplane during a go-around. Contributing factors were the gusts and crosswinds.
- [NTSB DEN07FA059](https://openairdocs.org/ntsb/DEN07FA059.md): Beech H-18 · Great Bend, KS · Accident · 1 fatal · Field investigation · Final report · Feb 9, 2007 · N45GM · Destroyed
  > The pilot's failure to maintain aircraft control during the missed approach which resulted in an inadvertent stall and impact with terrain. A contributing factor was the icing conditions.
- [NTSB CHI05LA171](https://openairdocs.org/ntsb/CHI05LA171.md): Yonchak Skybolt · El Dorado, KS · Accident · Serious injuries · Limited investigation · Final report · Jul 2, 2005 · N112MK · Substantial damage
  > The pilot's failure to maintain airspeed while maneuvering in the traffic pattern which resulted in an inadvertent stall. A factor was the low altitude.
- [NTSB CHI05CA150](https://openairdocs.org/ntsb/CHI05CA150.md): Cessna 172P · St. Francis, KS · Accident · No injuries · Data collection · Final report · Jun 19, 2005 · N53462 · Substantial damage
  > The pilot's failure to compensate for the crosswind conditions during landing and the unsuccessful go-around. A factor was the crosswind.
- [NTSB CHI04LA264](https://openairdocs.org/ntsb/CHI04LA264.md): Cessna 401 · New Century, KS · Accident · Minor injuries · Limited investigation · Final report · Sep 18, 2004 · N408TE · Substantial damage
  > A loss of engine power due to fuel starvation and the pilot's failure to maintain directional control during approach to an alternate airport. Contributing to the accident was the pilot's failure to obtain a weather briefing, his flight into adverse weather,…
- [NTSB CHI04CA141](https://openairdocs.org/ntsb/CHI04CA141.md): Doerr Raymond R RV-9A · Fort Scott, KS · Accident · Minor injuries · Data collection · Final report · Jun 6, 2004 · N369RV · Substantial damage
  > The vapor lock of the airplane fuel system and the ditch encountered during the emergency landing..
- [NTSB CHI04CA135](https://openairdocs.org/ntsb/CHI04CA135.md): Cessna T210L · Wichita, KS · Accident · Minor injuries · Data collection · Final report · Jun 4, 2004 · N59027 · Substantial damage
  > The pilot's inadequate in-flight planning/decision which resulted in fuel exhaustion and the loss of engine power.
- [NTSB CHI04CA115](https://openairdocs.org/ntsb/CHI04CA115.md): Villeneuve RV-3 · Mayetta, KS · Accident · No injuries · Data collection · Final report · May 8, 2004 · N12JV · Substantial damage
  > The pilot failed to maintain airspeed and aircraft control during final approach, which resulted in a stall/mush flight condition. A factor to the accident was the crosswind and the trees.
- [NTSB CHI04FA025](https://openairdocs.org/ntsb/CHI04FA025.md): Commander 114TC · Hutchinson, KS · Accident · 1 fatal · Field investigation · Final report · Nov 3, 2003 · N6107Z · Destroyed
  > The pilot's diverted attention during the missed approach which resulted in aircraft control not being maintained. Factors to the accident included the pilot not being current for instrument operations and the low cloud ceiling at night.
- [NTSB CHI03LA116](https://openairdocs.org/ntsb/CHI03LA116.md): Walker Lancair IV · Wamego, KS · Accident · No injuries · Limited investigation · Final report · Apr 26, 2003 · N7441W · Substantial damage
  > The pilot not maintaining altitude/clearance from the runway while maneuvering on final approach. A factor to the accident was the pilot's misjudgment of his altitude while on final approach.

Next page: https://openairdocs.org/ntsb-phases/500/cases.md?state=KS&page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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" = 'KS' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 500)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/500/cases?state=KS

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.