# NTSB investigations: 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 97 of 420 · 20,992 cases

## Cases, newest first

- [NTSB LAX01FA274](https://openairdocs.org/ntsb/LAX01FA274.md): Piper PA-28-180 · Boulder City, NV · Accident · 2 fatal · Field investigation · Final report · Aug 12, 2001 · N8098W · Destroyed
  > the pilot's failure to maintain an adequate terrain and obstruction clearance altitude while maneuvering in a non-standard visual approach to land. The pilot's misjudgment of his altitude and distance from the airport was due to impairment by alcohol. Factors…
- [NTSB FTW01LA179](https://openairdocs.org/ntsb/FTW01LA179.md): Pdps PZL-Bielsko SZD-55-1 · Uvalde, TX · Accident · 1 fatal · Limited investigation · Final report · Aug 12, 2001 · N55VW · Destroyed
  > the pilot's failure to maintain aircraft control during the base turn, which resulted in an inadvertant stall/spin.
- [NTSB CHI01LA278](https://openairdocs.org/ntsb/CHI01LA278.md): Gremminger 532 Commander · Ste. Genevieve, MO · Accident · No injuries · Limited investigation · Final report · Aug 12, 2001 · N609CE · Substantial damage
  > The inadequate fuel supply for the flight which resulted in fuel exhaustion. A factor associated with the accident was the low altitude and the soft terrain on which the forced landing was made.
- [NTSB DEN01LA143](https://openairdocs.org/ntsb/DEN01LA143.md): Blanik L-13 · Morgan, UT · Accident · No injuries · Limited investigation · Final report · Aug 11, 2001 · N310GM · Substantial damage
  > the pilot's inadvertent lowering of the flaps and her failure to extend the spoilers.
- [NTSB ANC01LA112](https://openairdocs.org/ntsb/ANC01LA112.md): Arctic S-1B2 · Wrangell, AK · Accident · No injuries · Limited investigation · Final report · Aug 11, 2001 · N61AT · Substantial damage
  > The pilot's inadequate evaluation of the weather conditions during a downwind landing at a remote lake. Factors in the accident were a downdraft, rough/uneven terrain, and the pilot's inadequate in-flight planning/decision(s).
- [NTSB MIA01LA211](https://openairdocs.org/ntsb/MIA01LA211.md): Beech BE-200 · Sandersville, GA · Accident · Serious injuries · Limited investigation · Final report · Aug 9, 2001 · N899RW · Substantial damage
  > The pilot-in command's failure to maintain airspeed during the approach, resulting in an inadvertent stall and in-flight collision with the terrain during an uncontrollable descent.
- [NTSB CHI01LA269](https://openairdocs.org/ntsb/CHI01LA269.md): Cessna P210N · Mackinac Island, MI · Accident · Serious injuries · Limited investigation · Final report · Aug 9, 2001 · N5268W · Destroyed
  > The pilot's failure to maintain proper glidepath during the landing approach resulting in the pilot not maintaining clearance from the trees. Factors were the haze, the gusty winds, and the trees.
- [NTSB LAX01LA273](https://openairdocs.org/ntsb/LAX01LA273.md): Cessna 150L · Fullerton, CA · Accident · Minor injuries · Limited investigation · Final report · Aug 8, 2001 · N6688G · Substantial damage
  > loss of engine power due to fuel contamination.
- [NTSB DEN01LA141](https://openairdocs.org/ntsb/DEN01LA141.md): Enstrom 280FX · Ouray, CO · Accident · No injuries · Limited investigation · Final report · Aug 8, 2001 · N724BF · Substantial damage
  > the partial loss of engine power due to the slippage of the wastegate linkage as a result of the plunger on the linkage being undertorqued by an unknown person. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB ANC01LA111](https://openairdocs.org/ntsb/ANC01LA111.md): Cessna 180A · Arctic Village, AK · Accident · No injuries · Limited investigation · Final report · Aug 7, 2001 · N81958 · Substantial damage
  > The pilot's improper use of carburetor heat during a go-around. Factors in the accident were carburetor icing conditions, and high vegetation in the landing area.
- [NTSB FTW01LA172](https://openairdocs.org/ntsb/FTW01LA172.md): Bell 206-L1 · Wc 173 · Accident · Serious injuries · Limited investigation · Final report · Aug 5, 2001 · N2755N · Substantial damage
  > the pilot's failure to maintain yaw control of the helicopter during approach.
- [NTSB LAX01LA269](https://openairdocs.org/ntsb/LAX01LA269.md): Luscombe 8A · Fort Bragg, CA · Accident · Minor injuries · Limited investigation · Final report · Aug 4, 2001 · N28882 · Substantial damage
  > the pilot's failure to maintain airspeed while making a precautionary landing resulting in an inadvertent stall.
- [NTSB MIA01LA207](https://openairdocs.org/ntsb/MIA01LA207.md): Cessna 172N · Covington, GA · Accident · Minor injuries · Limited investigation · Final report · Aug 2, 2001 · N3467E · Substantial damage
  > The flight instructor's improper monitoring of the dual student during a simulated engine out approach and her delayed decision to initiate a go-around resulting in the airplane colliding with trees at the departure end of the runway during the go-around.
- [NTSB MIA01FA206](https://openairdocs.org/ntsb/MIA01FA206.md): Mitsubishi MU-2B-35 · Hilton Head, SC · Accident · 1 fatal · Field investigation · Final report · Aug 1, 2001 · N1VY · Destroyed
  > Improper maintenance/installation and and inadequate inspection of the airplane's flap torque tube joints during routine maintenance by company maintenance personnel, which resulted in the right flap torque tube assembly coupler becoming detached and the…
- [NTSB LAX01LA263](https://openairdocs.org/ntsb/LAX01LA263.md): Cessna 152 · Pacoima, CA · Accident · Serious injuries · Limited investigation · Final report · Jul 29, 2001 · N67418 · Substantial damage
  > the pilot's inadequate fuel consumption calculations, which resulted in fuel exhaustion and loss of engine power while on approach for landing.
- [NTSB CHI01FA247](https://openairdocs.org/ntsb/CHI01FA247.md): Beech C35 · Oshkosh, WI · Accident · Minor injuries · Field investigation · Final report · Jul 29, 2001 · N35BJ · Substantial damage
  > The pilot's failure to maintain airspeed which resulted in an inadvertent stall.
- [NTSB NYC01FA189](https://openairdocs.org/ntsb/NYC01FA189.md): Piper PA-46-350 · Westfield, MA · Accident · 1 fatal · Field investigation · Final report · Jul 28, 2001 · N3DM · Destroyed
  > The pilot's failure to maintain aircraft control while maneuvering during a go-around.
- [NTSB DEN01LA128](https://openairdocs.org/ntsb/DEN01LA128.md): Cessna 182P · Bountiful, UT · Accident · Minor injuries · Limited investigation · Final report · Jul 26, 2001 · N21042 · Destroyed
  > the loss of engine power for an undetermined reason. A contributing factor was inadequate clearance of an obstacle during the forced landing by the pilot.
- [NTSB CHI01FA244](https://openairdocs.org/ntsb/CHI01FA244.md): Schuchart Stoddard HamiltonSH3 · Oshkosh, WI · Accident · 1 fatal · Field investigation · Final report · Jul 26, 2001 · N325HP · Destroyed
  > The inadvertent stall/spin by the pilot.
- [NTSB CHI01FA235](https://openairdocs.org/ntsb/CHI01FA235.md): Payne Giles G-202 · Oshkosh, WI · Accident · 1 fatal · Field investigation · Final report · Jul 24, 2001 · N202RP · Destroyed
  > The pilot failed to maintain aircraft control which resulted in an inadvertant stall. Factors with the accident were the pilot misjudged the approach and the pilot's lack of total experience in the Giles G-202.
- [NTSB CHI01LA227](https://openairdocs.org/ntsb/CHI01LA227.md): McIlraith Searey Amphibian · La Crosse, WI · Accident · No injuries · Limited investigation · Final report · Jul 23, 2001 · N216ST · Substantial damage
  > The pilot's inadequate compensation for wind conditions and turbulence which resulted in the encountered stall. Factors to the accident were turbulence and the high wind condition.
- [NTSB ATL01LA087](https://openairdocs.org/ntsb/ATL01LA087.md): Cessna 150F · Lake City, FL · Accident · Minor injuries · Limited investigation · Final report · Jul 20, 2001 · N8374G · Substantial damage
  > The pilots failure to maintain clearance during an approach to land, that resulted in an in-flight collision with trees.
- [NTSB SEA01LA135](https://openairdocs.org/ntsb/SEA01LA135.md): Piper PA-28-180 · Oak Harbor, WA · Accident · No injuries · Limited investigation · Final report · Jul 19, 2001 · N4231T · Substantial damage
  > The pilot's inadequate remedial action while on final approach. The encounter with wake turbulence was a factor.
- [NTSB NYC01IA199](https://openairdocs.org/ntsb/NYC01IA199.md): Raytheon 400A · Teterboro, NJ · Incident · No injuries · Incident investigation · Final report · Jul 19, 2001 · N3337J · No damage
  > The right aft rudder cable being installed over a cable guide by maintenance personnel.
- [NTSB LAX01LA247](https://openairdocs.org/ntsb/LAX01LA247.md): Beech J35 · Las Vegas, NV · Accident · No injuries · Limited investigation · Final report · Jul 19, 2001 · N3014C · Substantial damage
  > The pilot's failure to comply with the airplane flight manual, resulting in fuel starvation and subsequent forced landing on rough terrain.
- [NTSB NYC01FA178](https://openairdocs.org/ntsb/NYC01FA178.md): Beech 58-TC · Sidney, NY · Accident · 3 fatal · Field investigation · Final report · Jul 18, 2001 · N117HS · Destroyed
  > The pilot's failure to follow IFR procedures which resulted in a collision with rising terrain. Factors related to the accident were the rising terrain and fog.
- [NTSB LAX01LA250](https://openairdocs.org/ntsb/LAX01LA250.md): Piper PA-34-200 · Chandler, AZ · Accident · Minor injuries · Limited investigation · Final report · Jul 18, 2001 · N15120 · Substantial damage
  > The failure of maintenance personnel to properly tighten a fuel line fitting during an engine installation resulting in a fuel leak and fire during the maintenance checkflight. A factor in the accident was inadequate inspection of the installation prior to…
- [NTSB CHI01FA218](https://openairdocs.org/ntsb/CHI01FA218.md): Cessna 310R · Oak Creek, WI · Accident · 1 fatal · Field investigation · Final report · Jul 18, 2001 · N1448Z · Destroyed
  > The pilot not maintaining clearance from objects during an ILS approach in low night IFR conditions and his descent below decision height. Factors were the dark night, mist, low ceiling, and the trees west of the approach.
- [NTSB NYC01LA174](https://openairdocs.org/ntsb/NYC01LA174.md): Piper PA-46-310P · Stow, MA · Accident · Serious injuries · Limited investigation · Final report · Jul 16, 2001 · N9133D · Destroyed
  > The pilot's failure to maintain airplane control during a go-around.
- [NTSB NYC01LA175](https://openairdocs.org/ntsb/NYC01LA175.md): Yakovlev 52 · Moultonboro, NH · Accident · Minor injuries · Limited investigation · Final report · Jul 14, 2001 · N48GA · Substantial damage
  > A clogged fuel vent line due to a mud dauber nest, and rough terrain, including a large hole, in the forced landing field.
- [NTSB NYC01LA173](https://openairdocs.org/ntsb/NYC01LA173.md): Piper PA28-140 · Schuyler, NY · Accident · Minor injuries · Limited investigation · Final report · Jul 14, 2001 · N38390 · Substantial damage
  > The pilot's delayed go-around, which resulted in an in-flight collision with trees. A factor in this accident was the crosswind conditions.
- [NTSB SEA01LA130](https://openairdocs.org/ntsb/SEA01LA130.md): Piper PA-28-181 · Tekoa, WA · Accident · No injuries · Limited investigation · Final report · Jul 13, 2001 · N4920F · Substantial damage
  > The non-current pilot's failure to maintain sufficient altitude or clearance with wheat crops on short final, and the flight instructor's inadequate remedial action. Factors included wheat crops and a dirt bank on short final, the runway's lack of a visual…
- [NTSB CHI01FA206](https://openairdocs.org/ntsb/CHI01FA206.md): Beech E-55 · Carterville, MO · Accident · 6 fatal · Field investigation · Final report · Jul 13, 2001 · N91WC · Destroyed
  > The pilot's failure to maintain aircraft control and the pilot's improper in-flight planning and decisions. Factors relating to the accident were the pilot's lack of experience in the airplane, the inadvertent spiral, and the residence.
- [NTSB FTW01LA164](https://openairdocs.org/ntsb/FTW01LA164.md): Young RV-6 · Spring, TX · Accident · Minor injuries · Limited investigation · Final report · Jul 12, 2001 · N6GY · Destroyed
  > the loss of engine power for undetermined reasons during the landing approach. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB NYC01FA169](https://openairdocs.org/ntsb/NYC01FA169.md): Grumman American AA-1C · Medford, NJ · Accident · 2 fatal · Field investigation · Final report · Jul 10, 2001 · N9616U · Destroyed
  > The pilot's improper use of the flight controls while turning to base, which resulted in a stall/spin and subsequent impact with the ground.
- [NTSB CHI01LA202](https://openairdocs.org/ntsb/CHI01LA202.md): Cessna 172N · West Chicago, IL · Accident · No injuries · Limited investigation · Final report · Jul 10, 2001 · N5285E · Substantial damage
  > The instructor pilot's inadequate recovery from the bounced landing and inadequate supervision of the dual students alignment with the runway. A factor was the student pilot not maintaining proper alignment with the runway during landing.
- [NTSB LAX01FA236](https://openairdocs.org/ntsb/LAX01FA236.md): Bell 47D-1 · Riverside, CA · Accident · No injuries · Field investigation · Final report · Jul 6, 2001 · N64580 · Substantial damage
  > The engine crankshaft's failure as the result of fatigue cracking initiated by surface damage and localized overheating due to the installation at overhaul of incorrectly sized bearings.
- [NTSB IAD01LA076](https://openairdocs.org/ntsb/IAD01LA076.md): Rolladen-Schneider LS3-A · Front Royal, VA · Accident · Minor injuries · Limited investigation · Final report · Jul 5, 2001 · N113RM · Substantial damage
  > the pilot's inadequate altitude/clearance from a tree along his final approach path.
- [NTSB ATL01LA070](https://openairdocs.org/ntsb/ATL01LA070.md): Hughes 369A · Wadesboro, NC · Accident · No injuries · Limited investigation · Final report · Jul 3, 2001 · N539 · Substantial damage
  > The pilot's inadequate pre-flight planning which resulted in fuel exhaustion and the subsequent loss of engine power. A factor was rough and uneven terrain.
- [NTSB CHI01LA194](https://openairdocs.org/ntsb/CHI01LA194.md): Houston Challenger II · Sedalia, MO · Accident · 1 fatal · Limited investigation · Final report · Jul 2, 2001 · N902GH · Destroyed
  > the unsuitable terrain encountered during the forced landing. Additional factors were the pilot's lack of experience in the type of airplane, the loss of engine power for undetermined reasons, and the trees.
- [NTSB LAX01IA241](https://openairdocs.org/ntsb/LAX01IA241.md): Beech A36 · Bakersfield, CA · Incident · No injuries · Incident investigation · Final report · Jun 27, 2001 · N808NH · No damage
  > During landing approach, mechanical binding of the elevator control cable occurred due to a contract mechanic's improper maintenance.
- [NTSB ANC01TA076](https://openairdocs.org/ntsb/ANC01TA076.md): Bell 212 · Clear, AK · Accident · No injuries · Final report · Jun 27, 2001 · N5017H · Substantial damage
  > The pilot's selection of an unsuitable landing site following a partial loss of power during approach to landing in a multiengine helicopter. Factors associated with the accident are an automatic fuel control unit that had a restricted fuel flow due to an…
- [NTSB NYC01LA153](https://openairdocs.org/ntsb/NYC01LA153.md): Piper PA-28-140 · Rochester, NY · Accident · Serious injuries · Limited investigation · Final report · Jun 26, 2001 · N5265T · Substantial damage
  > Fuel exhaustion, due to the student pilot's failure to monitor his fuel supply.
- [NTSB ANC01LA074](https://openairdocs.org/ntsb/ANC01LA074.md): Cessna 150D · Soldotna, AK · Accident · Serious injuries · Limited investigation · Final report · Jun 26, 2001 · N73CC · Substantial damage
  > The loss of engine power due to fuel exhaustion and the pilot's failure to refuel the airplane.
- [NTSB LAX01LA221](https://openairdocs.org/ntsb/LAX01LA221.md): Cessna 172M · Napa, CA · Accident · No injuries · Limited investigation · Final report · Jun 25, 2001 · N1409V · Substantial damage
  > Loss of engine power due to the restricted movement of the number 1 exhaust valve that subsequently bent the exhaust push rod and push rod housing.
- [NTSB LAX01FA222](https://openairdocs.org/ntsb/LAX01FA222.md): Beech 35-B33 · Lakeside, CA · Accident · 1 fatal · Field investigation · Final report · Jun 25, 2001 · N22CR · Destroyed
  > Loss of control in flight due to cardiovascular incapacitation.
- [NTSB DEN01LA117](https://openairdocs.org/ntsb/DEN01LA117.md): Piper PA-12 · Eagle, CO · Accident · No injuries · Limited investigation · Final report · Jun 24, 2001 · N7850H · Substantial damage
  > the pilot's inadequate wind evaluation, and his inadequate planning/decision to land with a tailwind, at a density altitude of 13,418 feet. Contributing factors were the tailwind and the high density altitude weather condition.
- [NTSB MIA01LA170](https://openairdocs.org/ntsb/MIA01LA170.md): Unknown DragonFly B · LaBelle, FL · Accident · 2 fatal · Limited investigation · Final report · Jun 23, 2001 · UNREG · Substantial damage
  > The inadvertent stall/spin by the pilot resulting in an uncontrolled descent and impact with the ground.
- [NTSB IAD01FA070](https://openairdocs.org/ntsb/IAD01FA070.md): Piper PA-32R-301 · Greenwich, CT · Accident · 1 fatal · Field investigation · Final report · Jun 22, 2001 · N13VH · Destroyed
  > The pilot's failure to maintain control of the airplane while maneuvering in instrument meteorological conditions, due to spatial disorientation. Factors in the accident were the fog, and the pilot's use of a sedating medication.
- [NTSB LAX01LA216](https://openairdocs.org/ntsb/LAX01LA216.md): Schweizer 269C · Mesa, AZ · Accident · No injuries · Limited investigation · Final report · Jun 21, 2001 · N891CP · Substantial damage
  > a loss of power for unexplained reasons. Also causal was the CFI's operation of the helicopter in a region of the height/velocity curve where a successful autorotation could not be accomplished. A factor in the accident was the high density altitude.

Next page: https://openairdocs.org/ntsb-phases/500/cases.md?page=98

## 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 = 500)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/500/cases?page=97

---
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.
