# NTSB investigations: Takeoff

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 38 of 281 · 14,035 cases

## Cases, newest first

- [NTSB WPR17WA132](https://openairdocs.org/ntsb/WPR17WA132.md): Sikorsky S76 · Nilanga, India · Accident · No injuries · Foreign investigation · May 25, 2017 · VT-CMM · Substantial damage
  > On May 25, 2017, at 0625 Universal Coordinated Time, a Sikorsky S76, VT-CMM, was substantially damaged when it impacted the ground following a collision with powerlines near the Nilana Helipad, Nilanga, Maharashtra, India. The helicopter was operated under…
- [NTSB GAA17CA304](https://openairdocs.org/ntsb/GAA17CA304.md): Maule MX7 · Sidney, ME · Accident · No injuries · Data collection · Final report · May 23, 2017 · N888WF · Substantial damage
  > The pilot’s delayed application of rudder and failure to maintain directional control during takeoff.
- [NTSB GAA17CA292](https://openairdocs.org/ntsb/GAA17CA292.md): Airtime Cygnet · Casa Grande, AZ · Accident · Minor injuries · Data collection · Final report · May 21, 2017 · N168AT · Substantial damage
  > The flight instructor's failure to maintain directional control during takeoff in gusting crosswind conditions.
- [NTSB WPR17LA116](https://openairdocs.org/ntsb/WPR17LA116.md): Extra Flugzeugbau EA 300/S · Pendelton, OR · Accident · No injuries · Limited investigation · Final report · May 20, 2017 · N68PW · Substantial damage
  > The pilot’s failure to follow checklists to ensure the canopy was secured before takeoff.
- [NTSB GAA17CA302](https://openairdocs.org/ntsb/GAA17CA302.md): Cessna 175 · Prospect, OR · Accident · No injuries · Data collection · Final report · May 20, 2017 · N175DH · Substantial damage
  > The flight instructor’s failure to attain an adequate climb rate during takeoff, which resulted in impact with trees.
- [NTSB GAA17CA297](https://openairdocs.org/ntsb/GAA17CA297.md): CGS Hawk · Findlay, OH · Accident · Minor injuries · Data collection · Final report · May 18, 2017 · UNREG · Substantial damage
  > The 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 GAA17CA307](https://openairdocs.org/ntsb/GAA17CA307.md): Cessna U206 · Diamond Point, NY · Accident · No injuries · Data collection · Final report · May 17, 2017 · N4804F · Substantial damage
  > The pilot’s failure to maintain directional control during the takeoff roll with gusting wind conditions.
- [NTSB CEN17WA187](https://openairdocs.org/ntsb/CEN17WA187.md): Learjet 25 · Toluca, Mexico · Accident · 2 fatal · Foreign investigation · May 17, 2017 · XA-VMC · Destroyed
  > On May 17, 2017, at 2025 hours universal coordinated time, a Lear 25B airplane, Mexican registration XA-VMC, impacted terrain near Toluca, Mexico. The pilot-in-command and co-pilot were fatally injured. The airplane was destroyed by impact forces and a…
- [NTSB GAA17CA278](https://openairdocs.org/ntsb/GAA17CA278.md): Reims Cessna FR172 · De Pere, WI · Accident · Minor injuries · Data collection · Final report · May 13, 2017 · N42588 · Substantial damage
  > The pilot’s failure to maintain directional control during takeoff with a tailwind.
- [NTSB CEN17LA182](https://openairdocs.org/ntsb/CEN17LA182.md): Pipistrel Doo Ajdovscina Virus SW · Weatherford, TX · Accident · Serious injuries · Limited investigation · Final report · May 13, 2017 · N616NG · Substantial damage
  > The pilot's failure to obtain adequate airspeed during takeoff, which resulted in an aerodynamic stall/spin.
- [NTSB ERA17CA177](https://openairdocs.org/ntsb/ERA17CA177.md): Reupert Mark Avid Flyer · Reedsville, PA · Accident · Serious injuries · Data collection · Final report · May 10, 2017 · N532SE · Substantial damage
  > The sport pilot's failure to maintain airplane control during takeoff, which resulted in an exceedance of the airplane's critical angle of attack and a subsequent aerodynamic stall.
- [NTSB CEN17RA191](https://openairdocs.org/ntsb/CEN17RA191.md): Bell 429 · Presov, Slovakia · Accident · 2 fatal · Foreign investigation · May 10, 2017 · OM-BYM · Substantial damage
  > On May 10, 2017, about 1430 local time, a Bell 429 helicopter, Slovakia registration OM-BYM, impacted terrain shortly after takeoff near Presov, Slovakia. There were four people on board; two people received fatal injuries and two people received serious…
- [NTSB WPR17LA102](https://openairdocs.org/ntsb/WPR17LA102.md): Piper PA 18A · Coeur D'Alene, ID · Accident · Minor injuries · Limited investigation · Final report · May 8, 2017 · N245KW · Substantial damage
  > The loss of yaw control due to an inadequately compressed rudder swage, which resulted from inadequate maintenance and led to the separation of the forward right rudder cable.
- [NTSB CEN17LA177](https://openairdocs.org/ntsb/CEN17LA177.md): Grumman G-164C · Beech Grove, AR · Accident · No injuries · Limited investigation · Final report · May 8, 2017 · N171BW · Destroyed
  > A tire failure for reasons that could not be determined, which resulted in a loss of directional control during takeoff.
- [NTSB WPR17LA100](https://openairdocs.org/ntsb/WPR17LA100.md): Grumman G164 · Madera, CA · Accident · No injuries · Limited investigation · Final report · May 7, 2017 · N8712H · Destroyed
  > The pilot’s loss of directional control during takeoff with a quartering tailwind, which resulted in a runway excursion and separation of the right landing gear.
- [NTSB GAA17CA264](https://openairdocs.org/ntsb/GAA17CA264.md): Stinson 108 · Pedro Bay, AK · Accident · No injuries · Data collection · Final report · May 6, 2017 · N9510K · Substantial damage
  > The pilot’s failure to maintain directional control during the takeoff roll.
- [NTSB GAA17CA258](https://openairdocs.org/ntsb/GAA17CA258.md): Autogyro Calidus · Stevensville, MD · Accident · Minor injuries · Data collection · Final report · May 4, 2017 · N991TC · Substantial damage
  > The pilot’s improper takeoff procedure, which resulted in a loss of directional control during the takeoff.
- [NTSB CEN17LA190](https://openairdocs.org/ntsb/CEN17LA190.md): Air Tractor AT 502 · Tahoka, TX · Accident · Minor injuries · Limited investigation · Final report · May 4, 2017 · N144HF · Destroyed
  > The partial loss of engine power during takeoff for reasons that could not be determined based on the available information.
- [NTSB GAA17CA268](https://openairdocs.org/ntsb/GAA17CA268.md): Cessna 172 · Kaunakakai, HI · Accident · No injuries · Data collection · Final report · May 3, 2017 · N173LL · Substantial damage
  > The student pilot’s incorrect flap configuration during the go-around, which resulted in a hard, forced landing.
- [NTSB GAA17CA283](https://openairdocs.org/ntsb/GAA17CA283.md): Cessna 172 · Atlanta, GA · Accident · No injuries · Data collection · Final report · May 2, 2017 · N704RB · Substantial damage
  > The student’s incorrect use of the go-around procedure, which resulted in an aerodynamic stall, and the flight instructor’s delayed remedial action.
- [NTSB GAA17CA260](https://openairdocs.org/ntsb/GAA17CA260.md): Mooney M20 · Olathe, KS · Accident · Minor injuries · Data collection · Final report · May 2, 2017 · N7118U · Substantial damage
  > The separated fuel tank selector knob roll pin, which prevented the fuel selector from moving to the fuel tank position for the tank with usable fuel and resulted in fuel starvation and the subsequent total loss of engine power.
- [NTSB GAA17CA239](https://openairdocs.org/ntsb/GAA17CA239.md): Beech C23 · Fallon, NV · Accident · No injuries · Data collection · Final report · Apr 19, 2017 · N786KS · Substantial damage
  > The pilot's inaccurate takeoff performance calculations and failure to maintain directional control during an aborted takeoff.
- [NTSB GAA17CA237](https://openairdocs.org/ntsb/GAA17CA237.md): Brantly B 2B · Earl Park, IN · Accident · No injuries · Data collection · Final report · Apr 18, 2017 · N2198U · Substantial damage
  > The pilot’s failure to recognize that he was operating in the weathercock stability flight regime of loss of tail rotor effectiveness, which resulted in a loss of directional control during the execution of a right pedal turn.
- [NTSB DCA17WA097](https://openairdocs.org/ntsb/DCA17WA097.md): Boeing 777 · Amsterdam, Netherlands · Incident · No injuries · Foreign investigation · Apr 17, 2017 · VT-JEW · Minor damage
  > The government of Netherlands has notified the NTSB of an accident involving a BOEING 777 airplane that occurred on April 17, 2017. The NTSB has appointed a U.S. Accredited Representative to assist the government of Netherlands's investigation under the…
- [NTSB WPR17LA087](https://openairdocs.org/ntsb/WPR17LA087.md): Titan Tornado I · Spanaway, WA · Accident · Serious injuries · Limited investigation · Final report · Apr 13, 2017 · N5131H · Substantial damage
  > Maintenance personnel’s improper attachment of the aileron system components, which resulted in the pilot's inability to maintain flight control.
- [NTSB CEN17FA152](https://openairdocs.org/ntsb/CEN17FA152.md): Temco GC 1B · Hartsville, IN · Accident · 1 fatal · Field investigation · Final report · Apr 12, 2017 · N2377B · Substantial damage
  > The pilot's loss of control after exceeding the airplane's critical angle of attack during takeoff, which resulted in an aerodynamic stall.
- [NTSB GAA17CA232](https://openairdocs.org/ntsb/GAA17CA232.md): Cessna 172 · Houston, TX · Accident · No injuries · Data collection · Final report · Apr 11, 2017 · N92873 · Substantial damage
  > The pilot’s delayed attempt to abort the takeoff with a tailwind, which resulted in a runway overrun.
- [NTSB GAA17CA234](https://openairdocs.org/ntsb/GAA17CA234.md): Bellanca 8KCAB · Stafford, KS · Accident · No injuries · Data collection · Final report · Apr 9, 2017 · N55067 · Substantial damage
  > The pilot's failure to maintain directional control during the takeoff roll.
- [NTSB ERA17FA148](https://openairdocs.org/ntsb/ERA17FA148.md): Piper PA 12 · Sanford, FL · Accident · 1 fatal · Field investigation · Final report · Apr 8, 2017 · N3280M · Destroyed
  > The incorrect rigging of the elevator control cables, which resulted in a reversal of elevator control inputs applied by the pilot during the takeoff, an excessive nose-high pitch, and subsequent aerodynamic stall after takeoff. Also causal was the inadequate…
- [NTSB GAA17CA217](https://openairdocs.org/ntsb/GAA17CA217.md): Funk B85C · Cedar City, UT · Accident · Minor injuries · Data collection · Final report · Apr 5, 2017 · N81173 · Substantial damage
  > The pilot’s failure to maintain directional control of the airplane during the takeoff roll.
- [NTSB ERA17LA141](https://openairdocs.org/ntsb/ERA17LA141.md): Cessna R182 · Mooresville, NC · Accident · No injuries · Limited investigation · Final report · Mar 29, 2017 · N2383C · Substantial damage
  > The pilot's failure to properly configure the airplane's flaps for takeoff, which resulted in a longer ground roll and subsequent runway excursion.
- [NTSB GAA17CA200](https://openairdocs.org/ntsb/GAA17CA200.md): Dehavilland DHC-2 · Ketchikan, AK · Accident · No injuries · Data collection · Final report · Mar 22, 2017 · N264P · Substantial damage
  > The floatplane pilot's failure to avoid a buoy during takeoff.
- [NTSB GAA17CA193](https://openairdocs.org/ntsb/GAA17CA193.md): Piper PA 12 · Palmer, AK · Accident · No injuries · Data collection · Final report · Mar 19, 2017 · N92544 · Substantial damage
  > The pilot’s failure to maintain directional control during takeoff, which resulted in a ground loop.
- [NTSB CEN17LA145](https://openairdocs.org/ntsb/CEN17LA145.md): Cessna 120 · Columbia, IL · Accident · No injuries · Limited investigation · Final report · Mar 19, 2017 · N1915N · Substantial damage
  > The partial loss of engine power due to carburetor icing.
- [NTSB GAA17CA227](https://openairdocs.org/ntsb/GAA17CA227.md): Cubcrafters CC11-160 · Borrego Springs, CA · Accident · No injuries · Data collection · Final report · Mar 18, 2017 · N153JM · Substantial damage
  > The pilot’s selection of an unsuitable takeoff area, which resulted in impact with obstacles.
- [NTSB GAA17CA146](https://openairdocs.org/ntsb/GAA17CA146.md): Kaman Aerospace K 1200 · Julian, CA · Accident · No injuries · Data collection · Final report · Mar 13, 2017 · N675TH · Substantial damage
  > The pilot’s failure to conduct a thru-flight walkaround inspection, which resulted in the engine cowling remaining open and subsequently separating from the helicopter and striking the main rotor blades and vertical stabilizer during departure.
- [NTSB GAA17CA189](https://openairdocs.org/ntsb/GAA17CA189.md): Piper PA 28 · Gila Bend, AZ · Accident · No injuries · Data collection · Final report · Mar 12, 2017 · N288PA · Substantial damage
  > The flight instructor’s failure to review the notices to airmen related to the airport, which resulted in his landing on a closed runway and the airplane striking runway closed markers.
- [NTSB ERA17CA129](https://openairdocs.org/ntsb/ERA17CA129.md): Kerns Kenneth H Kens Wingless Wonder · Mount Airy, NC · Accident · Minor injuries · Data collection · Final report · Mar 12, 2017 · N7195R · Substantial damage
  > The pilot’s improper adjustment of the prerotator motor, which resulted in its failure to disengage and the subsequent loss of aircraft control during takeoff.
- [NTSB ERA17WA127](https://openairdocs.org/ntsb/ERA17WA127.md): Sikorsky S76 · Istanbul, Türkiye · Accident · 7 fatal · Foreign investigation · Mar 10, 2017 · TC-HEZ · Destroyed
  > On March 10, 2017, at 0821 coordinated universal time, a Sikorsky S-76C++ helicopter, Turkish registration TC-HEZ, was destroyed shortly after takeoff from the Istanbul Ataturk Airport (LTBA), Istanbul, Turkey. The two pilots and the five passengers were…
- [NTSB DCA17FA076](https://openairdocs.org/ntsb/DCA17FA076.md): Mcdonnell Douglas MD80 · Ypsilanti, MI · Accident · Minor injuries · Class 1 · Field · Final report · Mar 8, 2017 · N786TW · Substantial damage
  > the jammed condition of the airplane's right elevator, which resulted from exposure to localized, dynamic wind while the airplane was parked and rendered the airplane unable to rotate during takeoff. Contributing to the accident were (1) the effect of a large…
- [NTSB WPR17FA074](https://openairdocs.org/ntsb/WPR17FA074.md): Quicksilver MXL II · Hesperia, CA · Accident · 1 fatal · Field investigation · Final report · Mar 7, 2017 · UNREG · Substantial damage
  > The pilot's failure to identify and correct his construction error of a critical structural component, which resulted in a loss of airplane control during takeoff. Contributing to the accident was the pilot's impairment due to his combined use of multiple…
- [NTSB GAA17CA164](https://openairdocs.org/ntsb/GAA17CA164.md): Air Tractor AT 802 · Prentiss, MS · Accident · No injuries · Data collection · Final report · Feb 28, 2017 · N422BR · Substantial damage
  > The pilot's decision to take off with a gusting tailwind and his subsequent failure to maintain directional control.
- [NTSB GAA17CA166](https://openairdocs.org/ntsb/GAA17CA166.md): Piper PA28 · Phoenix, AZ · Accident · No injuries · Data collection · Final report · Feb 27, 2017 · N309PA · Substantial damage
  > The flight instructor’s incorrect control inputs while taking off with a known quartering tailwind, which resulted in a loss of directional control and runway excursion.
- [NTSB GAA17CA158](https://openairdocs.org/ntsb/GAA17CA158.md): Socata TBM700 · Bellingham, WA · Accident · No injuries · Data collection · Final report · Feb 27, 2017 · CGWVS · Substantial damage
  > The pilot’s failure to properly deice the airplane before takeoff, which resulted in an aerodynamic stall during the initial climb.
- [NTSB WPR17WA081](https://openairdocs.org/ntsb/WPR17WA081.md): Cessna 162 LSA · Faisalabad, Pakistan · Accident · 2 fatal · Foreign investigation · Feb 24, 2017 · AP-ZBQ · Substantial damage
  > The foreign authority was the source of this information. On February 24, 2017, at 0738 universal coordinated time, a Cessna 162, AP-ZBQ, collided with terrain shortly after takeoff from Faisalabad, Pakistan. The airplane was operated by M/S. Shaheen Air…
- [NTSB ENG17WA015](https://openairdocs.org/ntsb/ENG17WA015.md): Airbus A320 · Sao Paulo, Brazil · Incident · No injuries · Foreign investigation · Feb 23, 2017 · PT-MZY
  > On February 23, 2017, during takeoff from São Paulo airport, the right hand engine of a Brazilian registered Airbus 320, registration number PT–MZY, lost power, causing a rejected takeoff and a temporary excursion from the runway. The Brazilian Centro de…
- [NTSB DCA17WA115](https://openairdocs.org/ntsb/DCA17WA115.md): Airbus A321 · Cancun, Mexico · Incident · No injuries · Foreign investigation · Feb 20, 2017 · N995AN · No damage
  > The Direccion General de Aeronautica Civil (DGAC) of Mexico has notified the NTSB of an incident involving a AIRBUS A321 airplane that occurred on February 20, 2017. The NTSB has appointed a U.S. Accredited Representative to assist the government of Mexico's…
- [NTSB GAA17CA154](https://openairdocs.org/ntsb/GAA17CA154.md): Cessna 180 · Bally, PA · Accident · No injuries · Data collection · Final report · Feb 19, 2017 · N123GT · Substantial damage
  > The pilot’s failure to maintain directional control during takeoff in crosswind conditions.
- [NTSB GAA17CA144](https://openairdocs.org/ntsb/GAA17CA144.md): Pitts Special S 1C · Borger, TX · Accident · No injuries · Data collection · Final report · Feb 18, 2017 · N591P · Substantial damage
  > The pilot’s failure to maintain directional control of the biplane during takeoff.
- [NTSB ERA17CA114](https://openairdocs.org/ntsb/ERA17CA114.md): Cessna 172N · Statesville, NC · Accident · No injuries · Data collection · Final report · Feb 18, 2017 · N738DS · Substantial damage
  > A loss of airplane control during takeoff for reasons that could not be determined based on the available information.

Next page: https://openairdocs.org/ntsb-phases/300/cases.md?page=39

## 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."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 300)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/300/cases?page=38

---
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.
