# NTSB investigations: Maneuvering

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 116 of 378 · 18,851 cases

## Cases, newest first

- [NTSB CHI99GA185](https://openairdocs.org/ntsb/CHI99GA185.md): Piper PA-18-150 · Baudette, MN · Accident · 2 fatal · Final report · Jun 11, 1999 · N305NR · Destroyed
  > the pilot inadvertently stalled the airplane. A factor was the low altitude.
- [NTSB ANC99LA072](https://openairdocs.org/ntsb/ANC99LA072.md): Bell 206B · Juneau, AK · Accident · Minor injuries · Limited investigation · Final report · Jun 9, 1999 · N265AH · Substantial damage
  > The pilot's selection of an unsuitable landing/takeoff area, and his failure to maintain clearance from terrain. Factors associated with the accident are the confined/congested landing/takeoff area, and rocks/boulders in the takeoff area.
- [NTSB ANC99FA073](https://openairdocs.org/ntsb/ANC99FA073.md): Eurocopter AS-350BA · Juneau, AK · Accident · 7 fatal · Field investigation · Final report · Jun 9, 1999 · N6099S · Destroyed
  > The pilot's continued VFR flight into adverse weather, spatial disorientation, and failure to maintain aircraft control. Factors associated with the accident were pressure by the company to continue flights in marginal weather, and the "flat" lighting leading…
- [NTSB SEA99LA082](https://openairdocs.org/ntsb/SEA99LA082.md): Hughes 369D · Southbend, WA · Accident · Minor injuries · Limited investigation · Final report · Jun 8, 1999 · N8306F · Substantial damage
  > The complete loss of power, due to a failure of the compressor impeller disk. Factors include the low altitude of the helicopter at the time of the power loss, and the need to autorotate in a confined area.
- [NTSB LAX99LA253](https://openairdocs.org/ntsb/LAX99LA253.md): Hughes 369HS · Pacific Ocean (Pacific Ocean) · Accident · Minor injuries · Limited investigation · Final report · Jun 7, 1999 · N4278M · Destroyed
  > The removal of the tail rotor blade abrasion strips by the use of an unapproved method by the maintenance personnel which resulted in the imbalance of the tail rotor blade assembly and subsequent separation of the 90-degree gear box; the pilot/mechanic's…
- [NTSB NYC99FA126](https://openairdocs.org/ntsb/NYC99FA126.md): Beech D50C · Montgomery, NY · Accident · 2 fatal · Field investigation · Final report · May 30, 1999 · N401JD · Substantial damage
  > The pilot-in-command's failure to maintain adequate airspeed while maneuvering in the traffic pattern, which resulted in an inadvertent stall/spin.
- [NTSB ATL99LA099](https://openairdocs.org/ntsb/ATL99LA099.md): Cessna A185F · Chapin, SC · Accident · Minor injuries · Limited investigation · Final report · May 30, 1999 · N881FD · Substantial damage
  > The loss of engine power for undetermined reasons. A factor was the collision with a utility wire.
- [NTSB NYC99LA124](https://openairdocs.org/ntsb/NYC99LA124.md): Toman Great Lakes 2T-1AJ · Painesville, OH · Accident · 2 fatal · Limited investigation · Final report · May 29, 1999 · N275J · Destroyed
  > The pilot's improper decision to conduct low-level aerobatic flight, and his lack of adequate altitude for the maneuver attempted.
- [NTSB CHI99FA167](https://openairdocs.org/ntsb/CHI99FA167.md): Champion 7ECA · Comstock, WI · Accident · 1 fatal · Field investigation · Final report · May 29, 1999 · N12028 · Destroyed
  > The pilot's failure to maintain aircraft control. A factor contributing to this accident was the airplane's low altitude.
- [NTSB LAX99FA199](https://openairdocs.org/ntsb/LAX99FA199.md): Cessna 180J · Wickenburg, AZ · Accident · 1 fatal · Field investigation · Final report · May 27, 1999 · N2660M · Destroyed
  > The pilot's failure to maintain altitude/clearance from ground obstacles. A factor was the pilot's diverted attention in this accident.
- [NTSB MIA99LA160](https://openairdocs.org/ntsb/MIA99LA160.md): Grumman G-164A · Orlando, FL · Accident · No injuries · Limited investigation · Final report · May 25, 1999 · N711ZY · Substantial damage
  > The pilots misjudgment of altitude during an attempted banner tow pick-up. This resulted in the banner becoming entangled around the main landing gear. The pilot made a go-around. On landing rollout the banner became entangled around a runway light, and the…
- [NTSB NYC99LA116](https://openairdocs.org/ntsb/NYC99LA116.md): Nations Acro Sport II · Pence Springs, WV · Accident · 1 fatal · Limited investigation · Final report · May 23, 1999 · N113JN · Destroyed
  > The student pilot's improper decision to perform aerobatics, and his failure to maintain aircraft control, which resulted in an inadvertent spin. A factor in the accident was the pilot's lack of aerobatic experience.
- [NTSB CHI99LA158](https://openairdocs.org/ntsb/CHI99LA158.md): Boeing Stearman PT-27 · Grainfield, KS · Accident · Minor injuries · Limited investigation · Final report · May 23, 1999 · N59260 · Substantial damage
  > The pilot's improper in-flight decision and failure to maintain adequate clearance with the ground.
- [NTSB ATL99LA093](https://openairdocs.org/ntsb/ATL99LA093.md): Robert W. Ferrell Titan Tornado II · Ashboro, NC · Accident · No injuries · Limited investigation · Final report · May 22, 1999 · N624RF · Substantial damage
  > The loss of engine power for undetermined reasons. Factors were weather conditions favorable for the formation of carburetor ice.
- [NTSB DEN99LA079](https://openairdocs.org/ntsb/DEN99LA079.md): Piper PA-25-260 · Richfield, UT · Accident · No injuries · Limited investigation · Final report · May 21, 1999 · N8531L · Destroyed
  > The pilot's failure to maintain adequate altitude/clearance from the wires while maneuvering during an aerial application.
- [NTSB MIA99FA159](https://openairdocs.org/ntsb/MIA99FA159.md): Classic S-51D · Tamarac, FL · Accident · 1 fatal · Field investigation · Final report · May 20, 1999 · N25VV · Destroyed
  > A complete loss of engine power caused by the malfunctioning landing gear, which blocked the radiator scoop, leading to increased fuel temperature and the subsequent vapor lock condition and fuel blockage. A secondary cause was the pilot's failure to maintain…
- [NTSB MIA99FA158](https://openairdocs.org/ntsb/MIA99FA158.md): Hughes 369E · Intercession, FL · Accident · 1 fatal · Field investigation · Final report · May 20, 1999 · N144CM · Substantial damage
  > The pilot's improper fuel management that resulted in fuel exhaustion and a total loss of engine power.
- [NTSB SEA99LA067](https://openairdocs.org/ntsb/SEA99LA067.md): Grumman G-164B · Okanogan, WA · Accident · No injuries · Limited investigation · Final report · May 19, 1999 · N6861K · Substantial damage
  > A malfunctioning carburetor. Factors include a downdraft, and the soft dirt in a newly plowed field.
- [NTSB SEA99LA066](https://openairdocs.org/ntsb/SEA99LA066.md): Mooney M-20G · Burlington, WA · Accident · No injuries · Limited investigation · Final report · May 19, 1999 · N6700N · Substantial damage
  > A loss of engine power due to carburetor contamination. Factors include the pilot's misjudgment of altitude and distance when he performed his forced landing.
- [NTSB ATL99LA087](https://openairdocs.org/ntsb/ATL99LA087.md): Cessna T188C · Bruce, MS · Accident · No injuries · Limited investigation · Final report · May 14, 1999 · N1994J · Substantial damage
  > The loss of lubrication to the number 2 connecting rod due to the shifted bearing that resulted in the total loss of engine power.
- [NTSB FTW99LA138](https://openairdocs.org/ntsb/FTW99LA138.md): Cessna 152 · Washington, OK · Accident · Serious injuries · Limited investigation · Final report · May 12, 1999 · N4608Q · Destroyed
  > The flight instructor's inadequate supervision resulting in an inadvertent stall/spin by the student pilot.
- [NTSB MIA99LA151](https://openairdocs.org/ntsb/MIA99LA151.md): Boone RV6 · Apalachicola, FL · Accident · No injuries · Limited investigation · Final report · May 9, 1999 · N34C · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB CHI99FA147](https://openairdocs.org/ntsb/CHI99FA147.md): Taylorcraft BC-12D · Newton, IA · Accident · 1 fatal · Field investigation · Final report · May 9, 1999 · N96876 · Substantial damage
  > the failure of the pilot to maintain flying speed resulting in a stall and spin into the ground.
- [NTSB MIA99LA152](https://openairdocs.org/ntsb/MIA99LA152.md): Christen Industries S-2B · Knoxville, TN · Accident · No injuries · Limited investigation · Final report · May 8, 1999 · N260Z · Substantial damage
  > a total loss of engine power caused by the failure of the number 6 connecting rod, due to oil starvation for an undetermined reason.
- [NTSB DEN99LA076](https://openairdocs.org/ntsb/DEN99LA076.md): Cessna 150M · Maybell, CO · Accident · No injuries · Limited investigation · Final report · May 8, 1999 · N6128K · Substantial damage
  > The pilot's inadvertent stall while maneuvering. Factors were the wind gusts weather conditions, and the high density altitude weather conditions.
- [NTSB NYC99FAMS3](https://openairdocs.org/ntsb/NYC99FAMS3.md): Piper PA28RT-201T · Plymouth, MA · Accident · 1 fatal · Missing aircraft · Final report · May 6, 1999 · N8235Z · Destroyed
  > undetermined (missing airplane)
- [NTSB MIA99FA150](https://openairdocs.org/ntsb/MIA99FA150.md): Cessna 172 · Fontana, NC · Accident · 1 fatal · Field investigation · Final report · May 5, 1999 · N30DS · Destroyed
  > the pilot continued visual flight into know weather conditions which resulted in reduced visibility, and the subsequent in-flight collision with rising terrain. Factors in this accidents were clouds and low ceiling in the accident area.
- [NTSB ANC99TA058](https://openairdocs.org/ntsb/ANC99TA058.md): Bell UH-1B · Wrangell, AK · Accident · 1 fatal · Final report · May 5, 1999 · N97HM · No damage
  > The pilot-in-command's failure to maintain sufficient distance from a transmission wire, arcing of the transmission wire, the failure of company personnel to utilize a nonconducting cable, and an inadequate procedure utilized by the construction project…
- [NTSB NYC99FA100](https://openairdocs.org/ntsb/NYC99FA100.md): Stock S-1S · Westtown, NY · Accident · 1 fatal · Field investigation · Final report · May 2, 1999 · N29GS · Substantial damage
  > The pilot's inability to recover from an intentional stall spin maneuver. A factor in the accident was the change in the airplane's center of gravity which made the airplane more difficult to recover from a spin.
- [NTSB MIA99LA144](https://openairdocs.org/ntsb/MIA99LA144.md): Cessna 172H · Sylvan Springs, AL · Accident · No injuries · Limited investigation · Final report · May 1, 1999 · N5105G · Substantial damage
  > The total loss of engine power for undetermined reasons.
- [NTSB FTW99LA125](https://openairdocs.org/ntsb/FTW99LA125.md): Oakes J3 CUB · Greenbriar, AR · Accident · Serious injuries · Limited investigation · Final report · Apr 29, 1999 · N105LM · Substantial damage
  > The student pilot's failure to compensate for the gusty wind condition while maneuvering, which resulted in the inadvertent stall. A factor was the gusty wind condition.
- [NTSB SEA99LA141](https://openairdocs.org/ntsb/SEA99LA141.md): Bell 212 · Snoqualmie, WA · Accident · No injuries · Limited investigation · Final report · Apr 26, 1999 · N98W · Substantial damage
  > Clearance from an object was not maintained. A tree was a factor.
- [NTSB ANC99LA050](https://openairdocs.org/ntsb/ANC99LA050.md): Luscombe L-8F · Kodiak, AK · Accident · Serious injuries · Limited investigation · Final report · Apr 26, 1999 · N45627 · Substantial damage
  > The pilot's inadequate terrain clearance during the initial climb, and the inadvertent stall/spin during the turn to avoid terrain. A factor in this accident was the pilot exceeding the allowable maximum gross weight of the airplane.
- [NTSB NYC99FA097](https://openairdocs.org/ntsb/NYC99FA097.md): Ives Sonerai II-L · Eastford, CT · Accident · 1 fatal · Field investigation · Final report · Apr 25, 1999 · N56RA · Destroyed
  > Inadequate welding of the airplane's spar-box by the owner/builder, which resulted in a total spar-box failure in-flight. A factor in the accident was the pilot's decision to perform aerobatics.
- [NTSB LAX99FA162](https://openairdocs.org/ntsb/LAX99FA162.md): Globe GC-1B · Trona, CA · Accident · 2 fatal · Field investigation · Final report · Apr 25, 1999 · N80720 · Destroyed
  > The pilot's failure to maintain an adequate terrain clearance altitude while performing intentional low altitude passes over a campground.
- [NTSB SEA99LA054](https://openairdocs.org/ntsb/SEA99LA054.md): Wells Baby Lakes · Monroe, WA · Accident · 1 fatal · Limited investigation · Final report · Apr 22, 1999 · N92JW · Destroyed
  > The pilot's failure to maintain aircraft control. A factor was attempting to fly the airplane outside of its weight and balance limits.
- [NTSB MIA99LA133](https://openairdocs.org/ntsb/MIA99LA133.md): Bell 47G-3B1 · Thomastown, MS · Accident · No injuries · Limited investigation · Final report · Apr 19, 1999 · N32PH · Substantial damage
  > An in-flight loss of control caused by the main rotor severing the tail rotor drive shaft as a result of the pilot's cyclic pull-up into a tailwind for his second approach and landing. The loss of the tail rotor caused an uncontrollable descent and tree…
- [NTSB ATL99FA072](https://openairdocs.org/ntsb/ATL99FA072.md): Beech T-34A · Rydal, GA · Accident · 2 fatal · Field investigation · Final report · Apr 19, 1999 · N140SW · Destroyed
  > Fracture of the wing spar as a result of fatigue cracking that occurred over an unknown number of flights and flight hours with a wing loading spectrum not anticipated during design of the airplane. This report was modified on November 2, 2005.
- [NTSB LAX99LA154](https://openairdocs.org/ntsb/LAX99LA154.md): Cessna A150L · Lake Mary, AZ · Accident · Serious injuries · Limited investigation · Final report · Apr 18, 1999 · N6085J · Destroyed
  > The pilot's intentional buzzing and misjudged altitude/clearance with the nearby rising terrain. Contributing factors were the high density, the airplane's high gross weight, and the pilot's improper in-flight decisions.
- [NTSB LAX99LA148](https://openairdocs.org/ntsb/LAX99LA148.md): Piper PA-28-161 · Van Nuys, CA · Accident · No injuries · Limited investigation · Final report · Apr 15, 1999 · N8466F · Substantial damage
  > The check pilot's inadequate supervision of the flight and his failure to ensure that an adequate altitude margin existed during the maneuver.
- [NTSB MIA99LA128](https://openairdocs.org/ntsb/MIA99LA128.md): Piper PA-44-180 · Vero Beach, FL · Accident · No injuries · Limited investigation · Final report · Apr 14, 1999 · N30397 · Substantial damage
  > The improper return to service of a propeller hub by a propeller overhaul company which according to manufacturer's procedures should have been retired due to damage to propeller blades from sudden stoppage. This resulted in undetected fatigue propagation…
- [NTSB MIA99LA127](https://openairdocs.org/ntsb/MIA99LA127.md): Lake LA-4-200 · Pensacola, FL · Accident · No injuries · Limited investigation · Final report · Apr 14, 1999 · N959DF · Substantial damage
  > The pilot's inability to maintain directional control due to failure of the main landing gear, and partial electrical system failure for undetermined reasons.
- [NTSB MIA99LA129](https://openairdocs.org/ntsb/MIA99LA129.md): Mbb BK 117 A-3 · Sarasota, FL · Accident · No injuries · Limited investigation · Final report · Apr 11, 1999 · N163BK · Substantial damage
  > The pilot-in-command's failure to maintain a visual lookout while maneuvering in a hover resulting in the tail rotor colliding with a building.
- [NTSB LAX99LA143](https://openairdocs.org/ntsb/LAX99LA143.md): Bellanca 7KCAB · North Las Vegas, NV · Accident · Minor injuries · Limited investigation · Final report · Apr 10, 1999 · N88212 · Destroyed
  > The pilot's failure to ensure that all loose items inside the cockpit were secure before attempting aerobatic maneuvers.
- [NTSB MIA99LA121](https://openairdocs.org/ntsb/MIA99LA121.md): Frederick Sweet Rotorway Exec · Fort Myers, FL · Accident · No injuries · Limited investigation · Final report · Apr 8, 1999 · N31788 · Substantial damage
  > The pilot-in-command's failure to maintain aircraft control after the ground tie chain separated during engine run and hovering operations.
- [NTSB MIA99LA119](https://openairdocs.org/ntsb/MIA99LA119.md): David C. Bock Challenger II · Astatula, FL · Accident · No injuries · Limited investigation · Final report · Apr 7, 1999 · N929DB · Substantial damage
  > The aircraft structure fluttering inflight resulting in fracture of fuselage longerons and the pilot being unable to maintain control.
- [NTSB FTW99LA110](https://openairdocs.org/ntsb/FTW99LA110.md): Cessna 172N · Turrell, AR · Accident · No injuries · Limited investigation · Final report · Apr 7, 1999 · N5171K · Substantial damage
  > The total loss of engine power as the result of improper maintenance which led to the number one cylinder intake valve rocker assembly stud bolt backing out rendering the valve inoperative. A factor was the lack of suitable terrain for the forced landing.
- [NTSB SEA99LA047](https://openairdocs.org/ntsb/SEA99LA047.md): Aviat A-1 · Emmett, ID · Accident · Serious injuries · Limited investigation · Final report · Apr 6, 1999 · N345HU · Substantial damage
  > The pilot's failure to maintain aircraft control during a low-altitude maneuver to view a coyote on the ground. A related factor was the pilot's low altitude.
- [NTSB FTW99LA108](https://openairdocs.org/ntsb/FTW99LA108.md): Cessna 172M · Midlothian, TX · Accident · No injuries · Limited investigation · Final report · Apr 5, 1999 · N8963V · Substantial damage
  > The pilot's failure to maintain clearance with the powerlines. Factors were the low ceilings and the dusk light illumination.
- [NTSB LAX99FA137](https://openairdocs.org/ntsb/LAX99FA137.md): Mbb B0-105CBS-4 · Indian Springs, NV · Accident · 3 fatal · Field investigation · Final report · Apr 4, 1999 · N105HH · Destroyed
  > the pilot's decision to continue VFR flight in deteriorating IFR conditions resulting in spatial disorientation and subsequent loss of control.

Next page: https://openairdocs.org/ntsb-phases/450/cases.md?page=117

## 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 = 450)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/450/cases?page=116

---
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.
