# NTSB investigations: Initial climb

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 96 of 412 · 20,559 cases

## Cases, newest first

- [NTSB ATL99LA096](https://openairdocs.org/ntsb/ATL99LA096.md): Rutan VERI-EZE · Enterprise, AL · Accident · No injuries · Limited investigation · Final report · May 21, 1999 · N80SH · Substantial damage
  > The pilot's failure to remove covers from the fuel tank vent which resulted in fuel starvation.
- [NTSB DEN99LA080](https://openairdocs.org/ntsb/DEN99LA080.md): Artic S-1B2 · Lamar, CO · Accident · No injuries · Limited investigation · Final report · May 20, 1999 · N70AT · Substantial damage
  > The pilot's failure to maintain directional control during initial climb following takeoff. A factor was the pilot's lack of experience in the type of aircraft, and the fence.
- [NTSB ATL99LA089](https://openairdocs.org/ntsb/ATL99LA089.md): Boyd Dan MONO-WHEEL; Euro · Smith, AL · Accident · Serious injuries · Limited investigation · Final report · May 15, 1999 · N216JE · Substantial damage
  > The loss of engine power for undetermined reasons.
- [NTSB FTW99LA141](https://openairdocs.org/ntsb/FTW99LA141.md): Cessna 177 · Roanoke, TX · Accident · Serious injuries · Limited investigation · Final report · May 14, 1999 · N2343Y · Substantial damage
  > The partial loss of engine power for an undetermined reason. A factor was the lack of suitable terrain for the forced landing.
- [NTSB FTW99LA140](https://openairdocs.org/ntsb/FTW99LA140.md): Air Tractor AT-301 · Brownwood, TX · Accident · Minor injuries · Limited investigation · Final report · May 14, 1999 · N4329S · Destroyed
  > The failure of the pilot-in-command to use the manufacturer's published checklist and extend the flaps prior to takeoff. A factor was the pilot's fatigued physiological condition as a result of extended flight and ground duty hours.
- [NTSB ATL99LA083](https://openairdocs.org/ntsb/ATL99LA083.md): Michael W. Campbell Lancair 320 · Tallessee, AL · Accident · 1 fatal · Limited investigation · Final report · May 11, 1999 · N6111 · Substantial damage
  > The pilot's failure to maintain flying speed during the takeoff to initial climb that resulted in the a stall and the inflight collision with the trees.
- [NTSB LAX99FA177](https://openairdocs.org/ntsb/LAX99FA177.md): Aerostar Rally RX-8 · Morgan Hill, CA · Accident · 2 fatal · Field investigation · Final report · May 9, 1999 · N70290 · Destroyed
  > The pilot's selection of an inadequate takeoff site that did not allow sufficient horizontal clearance from obstacles in the takeoff path, and, his failure to ensure that all burners were connected to fuel sources, which reduced the available climb capability…
- [NTSB IAD99FA043](https://openairdocs.org/ntsb/IAD99FA043.md): Cessna 205 · Celina, OH · Accident · 6 fatal · Field investigation · Final report · May 9, 1999 · N8157Z · Destroyed
  > was the pilot's failure to refuel the airplane which resulted in fuel exhaustion and a loss of engine power. Also causal to the accident was the pilot's failure to maintain aircraft control after the power loss. A factor in the accident was a lack of…
- [NTSB FTW99LA134](https://openairdocs.org/ntsb/FTW99LA134.md): Grumman-Schweizer G164-B · Garwood, TX · Accident · No injuries · Limited investigation · Final report · May 8, 1999 · N6771K · Destroyed
  > The pilot's failure to maintain adequate airspeed which resulted in an inadvertent stall. A related factor was the high density altitude.
- [NTSB FTW99LA133](https://openairdocs.org/ntsb/FTW99LA133.md): Cessna 172M · Lancaster, TX · Accident · Minor injuries · Limited investigation · Final report · May 8, 1999 · N101PD · Substantial damage
  > The pilot's inadequate preflight inspection which resulted in fuel exhaustion and the subsequent total loss of engine power.
- [NTSB ATL99FA081](https://openairdocs.org/ntsb/ATL99FA081.md): Piper PA-24-180 · Vicksburg, MS · Accident · 4 fatal · Field investigation · Final report · May 8, 1999 · N5900P · Substantial damage
  > The pilot's failure to obtain and maintain flying speed that resulted in an inadvertent stall, and the collision with trees. A factor is the dark night.
- [NTSB LAX99LA180](https://openairdocs.org/ntsb/LAX99LA180.md): Grumman G-164A · Maxwell, CA · Accident · No injuries · Limited investigation · Final report · May 7, 1999 · N8875H · Destroyed
  > Failure of the pilot to attain and maintain the proper reference climb airspeed during the rotation and initial climb, which resulted in a stall/mush condition.
- [NTSB MIA99LA149](https://openairdocs.org/ntsb/MIA99LA149.md): R.O. and D.O Hewitt Kitfox IV-1200 · Kannapolis, NC · Accident · 2 fatal · Limited investigation · Final report · May 4, 1999 · N314PG · Destroyed
  > The failure of the pilot-in-command to maintain airspeed and the inadvertent stall resulting in the uncontrolled descent with terrain. A factor in the accident was the impairment of the pilot by drugs (tetrahydrocannabinol).
- [NTSB MIA99LA148](https://openairdocs.org/ntsb/MIA99LA148.md): Cessna 172N · Eagleville, TN · Accident · No injuries · Limited investigation · Final report · May 4, 1999 · N739EW · Substantial damage
  > The dual's student failure to maintain adequate altitude/clearance from the wire during takeoff/initial climb. Also causal was the certified flight instructor's inadequate supervision.
- [NTSB CHI99LA142](https://openairdocs.org/ntsb/CHI99LA142.md): Beech BE-23 · Houghton Lake, MI · Accident · Minor injuries · Limited investigation · Final report · May 4, 1999 · N2339Z · Substantial damage
  > The loss of engine power for undetermined reasons.
- [NTSB CHI99FA140](https://openairdocs.org/ntsb/CHI99FA140.md): Piper PA-28R-201 · Curran, MI · Accident · 3 fatal · Field investigation · Final report · May 2, 1999 · N5274A · Destroyed
  > the inadvertent stall/mush. Factor which contributed to this accident were the pilot's inadequate preflight planning, the premature lift-off during the takeoff, the airplane's low airspeed following lift-off, and the trees.
- [NTSB CHI99LA137](https://openairdocs.org/ntsb/CHI99LA137.md): Berrick GP-4 · Plattsmouth, NE · Accident · 2 fatal · Limited investigation · Final report · May 1, 1999 · N54WB · Destroyed
  > aircraft control and airspeed not maintained by the pilot-in-command. A factor to the accident was the inadvertent stall.
- [NTSB ATL99LA079](https://openairdocs.org/ntsb/ATL99LA079.md): Cessna 150J · Seneca, SC · Accident · Minor injuries · Limited investigation · Final report · May 1, 1999 · N50943 · Substantial damage
  > The pilot's failure to maintain adequate airspeed which resulted in a stall and subsequent impact with trees.
- [NTSB MIA99FA142](https://openairdocs.org/ntsb/MIA99FA142.md): Cessna 210L · Vero Beach, FL · Accident · 4 fatal · Field investigation · Final report · Apr 28, 1999 · N3458H · Destroyed
  > A loss of engine power due to a disconnected throttle/power lever, cable. Also causal was the failure of the mechanic to install a cotter pin in the throttle control cable attach hardware at the throttle control arm, and failure of the company quality control…
- [NTSB FTW99LA124](https://openairdocs.org/ntsb/FTW99LA124.md): Wsk Pzl Mielec M-18A · Hickory Ridge, AR · Accident · Serious injuries · Limited investigation · Final report · Apr 28, 1999 · N22524 · Substantial damage
  > The pilot's failure to maintain minimum required airspeed for flight, which resulted in an inadvertent stall/spin.
- [NTSB ATL99LA077](https://openairdocs.org/ntsb/ATL99LA077.md): Beech 23-B24R · Boone, NC · Accident · Serious injuries · Limited investigation · Final report · Apr 28, 1999 · N12RF · Destroyed
  > The pilots failure to obtain/maintain proper climb rate during initial climbout. This resulted in the collision with the mountain/hilly terrain.
- [NTSB CHI99LA134](https://openairdocs.org/ntsb/CHI99LA134.md): Dawe Arnet Pereyra AV II · Fremont, MI · Accident · Minor injuries · Limited investigation · Final report · Apr 26, 1999 · N6123P · Destroyed
  > the seizure of the powerplant.
- [NTSB DEN99FA066](https://openairdocs.org/ntsb/DEN99FA066.md): Smith, Ted Aerostar 601P · Ruidoso, NM · Accident · 2 fatal · Field investigation · Final report · Apr 23, 1999 · N48MD · Destroyed
  > The pilot's failure to maintain aircraft control for undetermined reason. A factor was the low ceiling IMC weather condition.
- [NTSB LAX99LA157](https://openairdocs.org/ntsb/LAX99LA157.md): Schweizer G-164B · Marysville, CA · Accident · No injuries · Limited investigation · Final report · Apr 19, 1999 · N3633B · Substantial damage
  > A loss of engine power due to a leaking surge bleed valve which induced compressor stalls within the engine.
- [NTSB LAX99LA156](https://openairdocs.org/ntsb/LAX99LA156.md): Beech A23-24 · Yerington, NV · Accident · No injuries · Limited investigation · Final report · Apr 18, 1999 · N7965L · Substantial damage
  > The partial loss of engine power due to the pilot's failure to properly lean the engine for the high density altitude takeoff.
- [NTSB FTW99LA117](https://openairdocs.org/ntsb/FTW99LA117.md): Cessna 170B · Fayetteville, AR · Accident · No injuries · Limited investigation · Final report · Apr 18, 1999 · N3251A · Substantial damage
  > The pilot's failure to obtain the proper climb rate resulting in an inadvertent stall. Factors were the rising terrain and the variable winds.
- [NTSB ANC99LA048](https://openairdocs.org/ntsb/ANC99LA048.md): Elam RAF 2000-GTX · Palmer, AK · Accident · No injuries · Limited investigation · Final report · Apr 18, 1999 · N95WE · Substantial damage
  > The pilot's inadequate compensation for wind conditions. A factor associated with the accident was a downdraft.
- [NTSB LAX99LA153](https://openairdocs.org/ntsb/LAX99LA153.md): Ventura Rans S-12 · El Cajon, CA · Accident · Serious injuries · Limited investigation · Final report · Apr 17, 1999 · N8179V · Substantial damage
  > Engine power loss due to an interruption of fuel to or within a carburetor, and the resultant overheating of its associated cylinder. The reason for the fuel flow interruption could not be determined.
- [NTSB CHI99LA127](https://openairdocs.org/ntsb/CHI99LA127.md): Reindl Quickie 2 · Olathe, KS · Accident · No injuries · Limited investigation · Final report · Apr 11, 1999 · N22RQ · Destroyed
  > The loss of engine power for undetermined reasons. A factor associated with the accident is the lack of suitable terrain for a forced landing.
- [NTSB CHI99LA125](https://openairdocs.org/ntsb/CHI99LA125.md): Piper PA-28-140 · Mora, MN · Accident · Minor injuries · Limited investigation · Final report · Apr 10, 1999 · N5416S · Substantial damage
  > the student pilot's improper soft field takeoff technique in that excessive back pressure was used which resulted in an inadvertent stall/mush. A factor associated with the accident was the student's lack of total experience.
- [NTSB FTW99LA113](https://openairdocs.org/ntsb/FTW99LA113.md): Grumman-Schweizer G-164B · Franklinton, LA · Accident · No injuries · Limited investigation · Final report · Apr 9, 1999 · N6673Q · Destroyed
  > Loss of engine power for an undetermined reason. A factor was the lack of suitable terrain for the forced landing.
- [NTSB ANC99LA043](https://openairdocs.org/ntsb/ANC99LA043.md): Piper PA-32R · Fairbanks, AK · Accident · Minor injuries · Limited investigation · Final report · Apr 5, 1999 · N1942H · Substantial damage
  > The loss of engine power due to the failure of maintenance personnel to properly torque a connecting rod bolt during an engine overhaul, and the subsequent disconnection of the connecting rod bolt and connecting rod.
- [NTSB ATL99FA066](https://openairdocs.org/ntsb/ATL99FA066.md): Piper PA-34-200 · Tallahassee, FL · Accident · 1 fatal · Field investigation · Final report · Apr 1, 1999 · N15478 · Destroyed
  > The pilot's failure to maintain flying speed during initial climb which resulted in a stall and uncontrolled collision with terrain.
- [NTSB NYC99LA083](https://openairdocs.org/ntsb/NYC99LA083.md): Cessna 182K · Orient, NY · Accident · Minor injuries · Limited investigation · Final report · Mar 31, 1999 · N3035Q · Destroyed
  > The pilot's inadequate compensation for crosswind conditions during takeoff.
- [NTSB FTW99LA101](https://openairdocs.org/ntsb/FTW99LA101.md): Grumman G-164B · Jennings, LA · Accident · No injuries · Limited investigation · Final report · Mar 26, 1999 · N6758Q · Substantial damage
  > The pilot's inadvertent stall during the departure turn to downwind. A factor was the tailwind.
- [NTSB LAX99LA122](https://openairdocs.org/ntsb/LAX99LA122.md): Aero Commander 500B · Shelter Cove, CA · Accident · Serious injuries · Limited investigation · Final report · Mar 19, 1999 · CFBCR · Destroyed
  > Fuel exhaustion due to the pilot's failure to ensure that an adequate fuel supply was onboard. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB FTW99LA095](https://openairdocs.org/ntsb/FTW99LA095.md): Grumman G-164A · Gillett, AR · Accident · Minor injuries · Limited investigation · Final report · Mar 18, 1999 · N8742H · Substantial damage
  > The pilot's failure to maintain terrain clearance during the downwind departure. Factors were the tailwind and the wet soft grass airstrip.
- [NTSB CHI99LA110](https://openairdocs.org/ntsb/CHI99LA110.md): Socata TB-9C · Cahokia, IL · Accident · Serious injuries · Limited investigation · Final report · Mar 18, 1999 · N508PC · Substantial damage
  > the in-flight loss of control by the student pilot due to wind turbulence. Additional causes were the flight instructor's inadequate supervision of the flight and the flight instructor's decision to continue the touch and go after encountering turbulence on…
- [NTSB LAX99LA120](https://openairdocs.org/ntsb/LAX99LA120.md): Piper PA-28-180 · Truckee, CA · Accident · Minor injuries · Limited investigation · Final report · Mar 15, 1999 · N4796L · Substantial damage
  > The pilot's failure to obtain and maintain the proper climb airspeed during the initial takeoff climb, including his failure to anticipate the gust factor and density altitude effects in determining a safe airspeed.
- [NTSB LAX99LA119](https://openairdocs.org/ntsb/LAX99LA119.md): Gallob Rans S4 · Mesa, AZ · Accident · Minor injuries · Limited investigation · Final report · Mar 14, 1999 · N199AG · Substantial damage
  > The pilot's failure to adequately compensate for the existing crosswind condition and to maintain lateral control of the aircraft.
- [NTSB ANC99LA033](https://openairdocs.org/ntsb/ANC99LA033.md): Cessna 180G · Fairbanks, AK · Accident · No injuries · Limited investigation · Final report · Mar 14, 1999 · N4721U · Substantial damage
  > Water contamination of the fuel supply, and the pilot's inadequate preflight inspection to ensure all water was removed from the fuel supply. Factors in the accident were a wrinkle in the wing fuel tank bladder, and snow covered terrain.
- [NTSB ANC99LA032](https://openairdocs.org/ntsb/ANC99LA032.md): Cessna 170B · Palmer, AK · Accident · No injuries · Limited investigation · Final report · Mar 13, 1999 · N4387B · Substantial damage
  > The pilot's inadequate preflight inspection, and his failure to refuel the airplane that resulted in fuel exhaustion.
- [NTSB ATL99LA054](https://openairdocs.org/ntsb/ATL99LA054.md): Mitsubishi MU-2B-20 · Knoxville, TN · Accident · No injuries · Limited investigation · Final report · Mar 12, 1999 · N176BJ · Substantial damage
  > A loss of engine power for undetermined reasons. Contributing to the accident was the failure of the landing gear to extend for undetermined reasons.
- [NTSB FTW99LA088](https://openairdocs.org/ntsb/FTW99LA088.md): Piper J3C-65 · Denton, TX · Accident · Minor injuries · Limited investigation · Final report · Mar 1, 1999 · N92350 · Substantial damage
  > The total loss of engine power on takeoff resulting from the failure of an incorrect throttle control cable clamp, which was installed by an unknown person. A factor was the lack of suitable terrain for the forced landing.
- [NTSB DEN99LA043](https://openairdocs.org/ntsb/DEN99LA043.md): Beech 35-C33 · Leadville, CO · Accident · No injuries · Limited investigation · Final report · Feb 28, 1999 · N977MC · Substantial damage
  > The pilot's in-flight decision to turn into rising terrain, and his decision to fly into and out of the airport in a heavy weight condition after the local flight instructor/FAA accident prevention counselor recommended that he should not. Factors were the…
- [NTSB CHI99LA092](https://openairdocs.org/ntsb/CHI99LA092.md): Cessna 172RG · Lawrenceville, IL · Accident · No injuries · Limited investigation · Final report · Feb 15, 1999 · N9506D · Substantial damage
  > the fatigue fracture of the landing gear actuator.
- [NTSB FTW99LA080](https://openairdocs.org/ntsb/FTW99LA080.md): Eurocopter BK 117 B-1 · Hockley, TX · Accident · No injuries · Limited investigation · Final report · Feb 13, 1999 · N220HH · Substantial damage
  > The pilot's failure to maintain clearance with the power lines. A factor was the sunglare reducing the pilot's visibility.
- [NTSB CHI99LA084](https://openairdocs.org/ntsb/CHI99LA084.md): Beech 35 · Lincoln, NE · Accident · Minor injuries · Limited investigation · Final report · Feb 9, 1999 · N5540D · Substantial damage
  > the pilot's failure to perform an aircraft preflight which resulted in him selecting a fuel tank which had insufficient fuel for the flight and the subsequent fuel starvation.
- [NTSB IAD99LA029](https://openairdocs.org/ntsb/IAD99LA029.md): Piper PA-32RT-300 · Medina, OH · Accident · Serious injuries · Limited investigation · Final report · Feb 7, 1999 · N31975 · Destroyed
  > Was the pilot's failure to remove snow from the horizontal stabilator prior to take-off and his improper decision to depart downwind. Factors in the accident were the heavy snow squall and tailwind.
- [NTSB FTW99FA075](https://openairdocs.org/ntsb/FTW99FA075.md): Cessna 182B · Ozona, TX · Accident · 5 fatal · Field investigation · Final report · Feb 6, 1999 · N54FC · Destroyed
  > the pilot's failure to obtain/maintain clearance from terrain during initial climb after take off. A contributing factor was the dark night.

Next page: https://openairdocs.org/ntsb-phases/350/cases.md?page=97

## 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 = 350)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/350/cases?page=96

---
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.
