# NTSB investigations: Enroute

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 276 of 718 · 35,885 cases

## Cases, newest first

- [NTSB BFO90FA045](https://openairdocs.org/ntsb/BFO90FA045.md): Cessna 210N · Shady Grove Cor, VA · Accident · 6 fatal · Field investigation · Final report · May 10, 1990 · N6481N · Destroyed
  > VFR flight by the non-instument rated pilot into instrument meteorological conditions (IMC), his loss of aircraft control, due to spatial disorientation, and his exceeding the design stress limits of the aircraft, while recovering from an uncontrolled…
- [NTSB ATL90FA111](https://openairdocs.org/ntsb/ATL90FA111.md): Cessna P206 · Liberty, NC · Accident · 1 fatal · Field investigation · Final report · May 9, 1990 · N220P · Substantial damage
  > A loss of engine power due to improper repairs to, and inadequate inspection of, the induction air box. The night light condition was a contributing factor.
- [NTSB ATL90LA106](https://openairdocs.org/ntsb/ATL90LA106.md): Piper PA-24 · Cartersville, GA · Accident · No injuries · Limited investigation · Final report · May 3, 1990 · N7868P · Substantial damage
  > The pilot's improper use of the engine fuel mixture control which resulted in fuel exhaustion.
- [NTSB MIA90LA115](https://openairdocs.org/ntsb/MIA90LA115.md): Williams, Robert G. AIR COMM. 532 Elite · Indian Rks Bch, FL · Accident · No injuries · Limited investigation · Final report · May 2, 1990 · N70319 · Substantial damage
  > Loss of power due to the overheated engine caused by a separated liquid coolant line which allowed the coolant to drain, resulting in the forced landing.
- [NTSB LAX90LA206](https://openairdocs.org/ntsb/LAX90LA206.md): Thunder and Colt AX9-140 · Napa, CA · Accident · Serious injuries · Limited investigation · Final report · May 2, 1990 · N9112R · No damage
  > The pilot's improper flare technique which resulted in a hard landing. A factor in the accident was the sudden appearance of a high wind condition.
- [NTSB BFO90LA041](https://openairdocs.org/ntsb/BFO90LA041.md): Hiller UH-12ET · Brookneal, VA · Accident · No injuries · Limited investigation · Final report · May 1, 1990 · N4034Z · Substantial damage
  > The pilot's improper preflight and improper in-flight planning/decision. Pilot fatigue was a related factor.
- [NTSB LAX90LA159](https://openairdocs.org/ntsb/LAX90LA159.md): Cessna 182L · Bullhead City, AZ · Accident · No injuries · Limited investigation · Final report · Apr 30, 1990 · N42748 · Substantial damage
  > The pilot's preflight planning/preparation and fuel calculations were poor.
- [NTSB NYC90FA099](https://openairdocs.org/ntsb/NYC90FA099.md): Grumman AA-5B · Fredericksburg, PA · Accident · 1 fatal · Field investigation · Final report · Apr 29, 1990 · N74312 · Destroyed
  > Continued VFR flight by the pilot into instrument meteorological conditions (IMC), and his failure (or inability) to maintain control of the aircraft after becoming spatially disoriented. Factors related to the accident were: adverse weather conditions, and…
- [NTSB LAX90LA157](https://openairdocs.org/ntsb/LAX90LA157.md): Robinson R22 · Mammoth Lakes, CA · Accident · Minor injuries · Limited investigation · Final report · Apr 29, 1990 · N8560M · Substantial damage
  > Pilot's encounter with a strong downdraft while cruising at an inadequate altitude. A contributing factor was the high altitude which limited available engine power for recovery.
- [NTSB NYC90LA097](https://openairdocs.org/ntsb/NYC90LA097.md): Cessna 150 · Tinton Falls, NJ · Accident · No injuries · Limited investigation · Final report · Apr 28, 1990 · N1561Q · Substantial damage
  > The failure of the student pilot to ensure there was sufficient fuel on board for the planned flight. A factor related to the accident was the failure of the flight instructor to properly prepare his student for the flight.
- [NTSB MIA90LA112](https://openairdocs.org/ntsb/MIA90LA112.md): Cessna 172D · Isla Grande, PR · Accident · Minor injuries · Limited investigation · Final report · Apr 28, 1990 · N2670U · Substantial damage
  > Improper use of carburetor heat by the pilot, which resulted in carburetor ice. The weather (carburetor icing condition) was a related factor.
- [NTSB FTW90LA103](https://openairdocs.org/ntsb/FTW90LA103.md): Beech BE-35M · Tomball, TX · Accident · No injuries · Limited investigation · Final report · Apr 28, 1990 · N1ZY · Substantial damage
  > An engine failure due to detonation and subsequent piston overtemperature and erosion. A factor related to the accident was the lack of suitable terrain.
- [NTSB LAX90LA155](https://openairdocs.org/ntsb/LAX90LA155.md): Enstrom F28F · Corona, CA · Accident · No injuries · Limited investigation · Final report · Apr 27, 1990 · N756H · Substantial damage
  > The partial failure of the engine's right magneto, which resulted in a loss of engine power.
- [NTSB FTW90LA101](https://openairdocs.org/ntsb/FTW90LA101.md): Piper PA28-235 · Granbury, TX · Accident · Minor injuries · Limited investigation · Final report · Apr 27, 1990 · N9488W · Substantial damage
  > Fuel starvation due to the pilot's disregard for the position of the fuel tank selector.
- [NTSB DEN90FA103](https://openairdocs.org/ntsb/DEN90FA103.md): Piper PA-32C-300 · Leadville, CO · Accident · 6 fatal · Field investigation · Final report · Apr 27, 1990 · N8912N · Destroyed
  > VFR flight into instrument meteorological conditions (IMC) by the pilot, and his failure to maintain sufficient altitude and clearance from mountainous terrain. Factors related to the accident were: the terrain and weather conditions, the pilot's…
- [NTSB BFO90IA039](https://openairdocs.org/ntsb/BFO90IA039.md): Bellanca 17-30 · Davis, WV · Incident · No injuries · Incident investigation · Final report · Apr 27, 1990 · N4802V · No damage
  > The improper installation of the connecting rod bearings on the number one cylinder.
- [NTSB NYC90LA092](https://openairdocs.org/ntsb/NYC90LA092.md): Schweizer SGS-1-26B · Unionville, PA · Accident · Minor injuries · Limited investigation · Final report · Apr 26, 1990 · N9856E · Substantial damage
  > The loss of thermal lift which necessitated a forced landing on unsuitable terrain covered by trees and high obstructions.
- [NTSB FTW90FA100](https://openairdocs.org/ntsb/FTW90FA100.md): Learjet 25D · Uvalde, TX · Accident · No injuries · Field investigation · Final report · Apr 26, 1990 · XAROZ · Substantial damage
  > Failure of the pilot to obtain a pre-flight weather briefing, and his improper in-flight planning/decision, which resulted in an in-flight encounter with severe weather and subsequent engine flameouts. Factors related to the accident were: darkness, the…
- [NTSB MIA90LA110](https://openairdocs.org/ntsb/MIA90LA110.md): Cessna 180K · Crystal Springs, MS · Accident · No injuries · Limited investigation · Final report · Apr 25, 1990 · N61714 · Substantial damage
  > Pilots failure to assure that the fuel cap was in position and secured prior to departure. This resulted in fuel siphoning overboard resulting in the precautionary landing.
- [NTSB ATL90LA104](https://openairdocs.org/ntsb/ATL90LA104.md): Balloon Works 7B · Lexington, KY · Accident · No injuries · Limited investigation · Final report · Apr 22, 1990 · N1512T · Substantial damage
  > The overload failure of several jumper cords. Factor(s) were inadvertent encounter with unfavorable wind (dust devil). Subsequently, the pilot was unable to control the rate of descent.
- [NTSB DEN90LA098](https://openairdocs.org/ntsb/DEN90LA098.md): Cessna 310B · Elizabeth, CO · Accident · No injuries · Limited investigation · Final report · Apr 21, 1990 · N6641B · Substantial damage
  > The pilot's attempt to takeoff with a known deficiency and the partial failure of the propeller feathering system.
- [NTSB ANC90LA063](https://openairdocs.org/ntsb/ANC90LA063.md): Bell 206B3 · Williamsport, AK · Accident · No injuries · Limited investigation · Final report · Apr 21, 1990 · N1075G · Substantial damage
  > The manufacturer's inadequate part design and the improper maintenance techniques by the operator.
- [NTSB MKC90LA088](https://openairdocs.org/ntsb/MKC90LA088.md): Bell 47 · Oakdale, MN · Accident · Serious injuries · Limited investigation · Final report · Apr 18, 1990 · N5120B · Substantial damage
  > A slipping rotor drive clutch assembly due to improper maintenance by company personnel. Contributing factors were static wires in the path.
- [NTSB DEN90LA093](https://openairdocs.org/ntsb/DEN90LA093.md): Cessna 172 · Columbia Falls, MT · Accident · No injuries · Limited investigation · Final report · Apr 18, 1990 · N3233L · Substantial damage
  > The pilot's failure to preflight and secure the fuel cap which resulted in the loss of fuel and the loss of engine power from fuel exhaution. Factor was soft terrain during forced landing.
- [NTSB MKC90LA089](https://openairdocs.org/ntsb/MKC90LA089.md): Cessna 150 · Two Harbors, MN · Accident · Minor injuries · Limited investigation · Final report · Apr 17, 1990 · N4020J · Substantial damage
  > Pilot factor in that he failed to maintain flying speed.
- [NTSB MKC90FA091](https://openairdocs.org/ntsb/MKC90FA091.md): Piper PA32RT-300 · Mansfield, AR · Accident · 2 fatal · Field investigation · Final report · Apr 17, 1990 · N2208N · Destroyed
  > The non-instrument rated pilot's decision to continue VFR flight into IMC. Contributing to the accident were the low ceilings, rain, and turbulence encountered at low altitude, and the pilot's lack of instrument training/experience.
- [NTSB FTW90LA096](https://openairdocs.org/ntsb/FTW90LA096.md): Bell 206L-1 · E. Island Blk15 · Accident · Serious injuries · Limited investigation · Final report · Apr 17, 1990 · N1071A · No damage
  > The loss of continuity in the compressor section of the engine due to a fatique failure of the spur adapter gear shaft.
- [NTSB ANC90LA058](https://openairdocs.org/ntsb/ANC90LA058.md): Cessna 185E · Bethel, AK · Accident · No injuries · Limited investigation · Final report · Apr 16, 1990 · N2214T · Substantial damage
  > Improper planning/decision by the pilot, which resulted in fuel exhaustion, due to an inadeqaute supply of fuel.
- [NTSB SEA90LA068](https://openairdocs.org/ntsb/SEA90LA068.md): Truckee Meadows Tierra II · Moscow, ID · Accident · 1 fatal · Limited investigation · Final report · Apr 15, 1990 · N52744 · Destroyed
  > The pilot did not maintain a proper airspeed during the climb to cruise.
- [NTSB FTW90LA095](https://openairdocs.org/ntsb/FTW90LA095.md): Hughes 369HS · Junction, TX · Accident · No injuries · Limited investigation · Final report · Apr 15, 1990 · N9138F · Substantial damage
  > The pilot in command's inadequate execution of the autorotation following a engine failure which resulted from his failure to refuel the aircraft with the proper grade of fuel when he ran short during the flight.
- [NTSB ATL90LA097](https://openairdocs.org/ntsb/ATL90LA097.md): Cessna T210 · Lafayette, GA · Accident · No injuries · Limited investigation · Final report · Apr 15, 1990 · N761YK · Substantial damage
  > The pilot's failure to properly manage his fuel supply, which resulted in a loss of engine power, due to fuel starvation.
- [NTSB ATL90FA099](https://openairdocs.org/ntsb/ATL90FA099.md): Airship Industries Airship 600 · Creswell, NC · Accident · No injuries · Field investigation · Final report · Apr 15, 1990 · N602SK · Substantial damage
  > The failure of the electronic ignition units as the Airship traversed the directional antenna beam of a high intensity radiated electromagnetic field (hirf). Factors related to the accident were: the unfavorable wind and the lack of hirf certification…
- [NTSB MKC90LA085](https://openairdocs.org/ntsb/MKC90LA085.md): Boeing A75N1 · Pleasant Grove, AR · Accident · Serious injuries · Limited investigation · Final report · Apr 14, 1990 · N1902M · Substantial damage
  > Improper use of carburetor heat by the pilot, which resulted in carburetor icing. The weather (carburetor icing condition) was a related factor.
- [NTSB ATL90DKJ05](https://openairdocs.org/ntsb/ATL90DKJ05.md): Hood Quickie · Altoona, AL · Accident · Minor injuries · Final report · Apr 13, 1990 · N36RH · Substantial damage
  > The pilot's inadequate preflight and a blocked fuel vent, which resulted in fuel starvation.
- [NTSB MKC90LA084](https://openairdocs.org/ntsb/MKC90LA084.md): Aeronca 7AC · Branson, MO · Accident · No injuries · Limited investigation · Final report · Apr 12, 1990 · N84055 · Substantial damage
  > A disconnected throttle linkage that was inadequately inspected.
- [NTSB MIA90LA103](https://openairdocs.org/ntsb/MIA90LA103.md): Swing Velocity RG · Wimauma, FL · Accident · No injuries · Limited investigation · Final report · Apr 11, 1990 · N125V · Substantial damage
  > Delamination of a portion of one of the wooden propeller blades at a knot, resulting in severe vibration and necessitating a forced landing.
- [NTSB FTW90FA094](https://openairdocs.org/ntsb/FTW90FA094.md): Beech B35-C33A · Le Compte, LA · Accident · 1 fatal · Field investigation · Final report · Apr 10, 1990 · N7968M · Destroyed
  > The pilot's continuation of VFR flight into IMC. Factors were the pilot's failure to obtain a pre-flight weather brief and his inadequate evalution of existing weather.
- [NTSB FTW90FA093](https://openairdocs.org/ntsb/FTW90FA093.md): Mooney M-20J · Inola, OK · Accident · 1 fatal · Field investigation · Final report · Apr 10, 1990 · N526L · Destroyed
  > The pilot's decision to conduct the flight into known adverse weather and his inability to maintain control of the airplane due to spatial disorientation. Factors were the dark night conditions and thunderstorms.
- [NTSB DEN90FA089](https://openairdocs.org/ntsb/DEN90FA089.md): Cessna 210E · Elbert, CO · Accident · 1 fatal · Field investigation · Final report · Apr 9, 1990 · N4912U · Destroyed
  > The pilot's initiation of flight into known adverse weather, the rapid ice accumulation on the airframe, and an inadvertent stall-mush, resulting in an uncontrolled descent into terrain.
- [NTSB ATL90LA094](https://openairdocs.org/ntsb/ATL90LA094.md): Grumman AA-5B · Stone Mountain, GA · Accident · No injuries · Limited investigation · Final report · Apr 9, 1990 · N74651 · Substantial damage
  > The pilot's misjudged approach which resulted in a long, fast landing and subsequent overrun of the departure threshold. Factors in the accident were the pilot's failure to lower the flaps and establish a proper glidepath.
- [NTSB ATL90FA095](https://openairdocs.org/ntsb/ATL90FA095.md): Embraer EMB-120 · Gadsden, AL · Accident · 2 fatal · Field investigation · Final report · Apr 9, 1990 · N217AS · 2 aircraft · Substantial damage
  > Inadequate visual lookout by the pilots of both aircraft, which resulted in their failure to see-and-avoid oncoming traffic. A factor related to the accident was: the sun's glare, which restricted the vision of the Cessna 172 pilot.
- [NTSB LAX90FA281](https://openairdocs.org/ntsb/LAX90FA281.md): Cessna 172E · Santa Paula, CA · Accident · 2 fatal · Field investigation · Final report · Apr 8, 1990 · N39155 · Destroyed
  > The pilot's improper preflight planning and preparation and his delayed remedial action in executing a 180 degree turn. Contributing to this accident was the pilot's inadvertent encounter with weather conditions.
- [NTSB ANC90LA045](https://openairdocs.org/ntsb/ANC90LA045.md): Aerospatiale SA-315B · Trading Bay, AK · Accident · Minor injuries · Limited investigation · Final report · Apr 6, 1990 · N37903 · Substantial damage
  > The pilot's inadvertent flight into instrument meteorological conditions (IMC). Factors related to the accident were: snow covered terrain, adverse weather conditions, and spatial disorientation of the pilot, due to lack of visual cure during the landing.
- [NTSB MIA90FA101](https://openairdocs.org/ntsb/MIA90FA101.md): Lockheed L-1049F · Levittown, PR · Accident · 1 fatal · Field investigation · Final report · Apr 5, 1990 · HI515 · Destroyed
  > Fire of an undetermined origin that resulted in a loss of power in two engines during a three engine ferry flight. Factors related to the accident were: failure of the pilot to obtain the required authorization for the three engine ferry flight, and his…
- [NTSB ATL90LA092](https://openairdocs.org/ntsb/ATL90LA092.md): Beech B35 · Brunswick, GA · Accident · No injuries · Limited investigation · Final report · Apr 5, 1990 · N5180C · Substantial damage
  > The pilot's failure to properly manage his fuel supply by switching to a tank with fuel prior to the loss of engine power. Collision with the tree(s) was a factor related to the accident.
- [NTSB FTW90LA090](https://openairdocs.org/ntsb/FTW90LA090.md): Hughes H500C · Houston, TX · Accident · No injuries · Limited investigation · Final report · Apr 3, 1990 · N9128F · Substantial damage
  > The total failure of the engine for undertemined reasons and the pilot misjudging the flare prior to touchdown.
- [NTSB CHI90DEP03](https://openairdocs.org/ntsb/CHI90DEP03.md): James A Nelson ZEN AIR CH701 · Raymond, WI · Accident · No injuries · Final report · Apr 3, 1990 · N360JN · Substantial damage
  > Manufacturer's inadequate design of the fuel drain. Contributing was the pilot-in-command's disregarding the fuel supply which resulted in fuel exhaustion.
- [NTSB NYC90FA083](https://openairdocs.org/ntsb/NYC90FA083.md): Cessna 150F · Lloyd, NY · Accident · 1 fatal · Field investigation · Final report · Apr 1, 1990 · N7034F · Destroyed
  > Pilot factor in that he was attempting VFR flight in inc conditions and collided with a multipurpose communications tower.
- [NTSB LAX90LA141](https://openairdocs.org/ntsb/LAX90LA141.md): Fairchild SA227AC · Panoche, CA · Accident · No injuries · Limited investigation · Final report · Apr 1, 1990 · N27220 · Substantial damage
  > The pilot's poor judgment in attempting a flight while being fatigued due to the lack of sleep which resulted in a loss of control and subsequent overstressing of the airplane.
- [NTSB LAX90LA132](https://openairdocs.org/ntsb/LAX90LA132.md): Aerospatiale AS350B · Saipan (Pacific Ocean) · Accident · No injuries · Limited investigation · Final report · Apr 1, 1990 · N350AP · Destroyed
  > The partial failure of a rotor system component for undetermined reasons.

Next page: https://openairdocs.org/ntsb-phases/400/cases.md?page=277

## 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 = 400)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/400/cases?page=276

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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.