# NTSB investigations, 1999: In flight encounter with weather

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 1 of 3 · 101 cases

## Latest cases

- [NTSB SEA00LA034](https://openairdocs.org/ntsb/SEA00LA034.md): Cessna 182S · Kennewick, WA · Accident · No injuries · Limited investigation · Final report · Dec 30, 1999 · N374TC · Substantial damage
  > The pilot's decision to continue flight into known icing conditions, and his subsequent failure to maintain adequate airspeed on final approach, resulting in a hard landing. Factors included: icing conditions; the pilot's improper decision to continue to his…
- [NTSB DEN00LA031](https://openairdocs.org/ntsb/DEN00LA031.md): Luscombe 8E · San Luis, CO · Accident · Serious injuries · Limited investigation · Final report · Dec 25, 1999 · N1941B · Substantial damage
  > The pilot's inadequate in-flight decision, and the subsequent inadvertent stall/mush. Factors were the pilot's lack of total experience in mountain flying, the high density altitude, and downdraft weather conditions.
- [NTSB ATL00LA018](https://openairdocs.org/ntsb/ATL00LA018.md): Cessna 208B · Adjuntas, PR · Accident · Serious injuries · Limited investigation · Final report · Dec 23, 1999 · N1315A · Destroyed
  > The pilot continued flight into adverse weather conditions that included low ceiling and turbulence. Factors to the accident were trees.
- [NTSB MIA00FA058](https://openairdocs.org/ntsb/MIA00FA058.md): Aero Commander 500 · Georgetown, SC · Accident · 2 fatal · Field investigation · Final report · Dec 22, 1999 · N6261B · Destroyed
  > The noninstrument-rated pilot's improper decision to attempt VFR flight into known instrument flight conditions, willful disregard of FAA Automated Flight Service Station weather forecast/weather observations, failure to maintain airspeed (VSO) while…
- [NTSB ANC00FA018](https://openairdocs.org/ntsb/ANC00FA018.md): Cessna 207 · Bethel, AK · Accident · 6 fatal · Field investigation · Final report · Dec 7, 1999 · N1747U · Destroyed
  > The pilot's continued VFR flight into instrument meteorological conditions. Factors associated with the accident were low ceilings, fog, and snow-covered terrain.
- [NTSB MIA00FA029](https://openairdocs.org/ntsb/MIA00FA029.md): Hughes 369HS · Helena, AL · Accident · 2 fatal · Field investigation · Final report · Nov 25, 1999 · N395WM · Destroyed
  > The pilots continued visual flight rules flight into instrument meteorological conditions resulting in his becoming spatially disoriented and loosing control of the helicopter, which resulted in an uncontrolled descent and impact with the ground.
- [NTSB MIA00LA028](https://openairdocs.org/ntsb/MIA00LA028.md): Cessna 172N · Defuniak Spgs, FL · Accident · No injuries · Limited investigation · Final report · Nov 22, 1999 · N733AH · Substantial damage
  > Was the pilot's failure to obtain a proper weather briefing resulting in his encounter with fog, his having to make a precautionary landing in a field when the aircraft became low on fuel, and the on ground collision with trees during landing roll.
- [NTSB ANC00LA013](https://openairdocs.org/ntsb/ANC00LA013.md): Maule M7-235C · Palmer, AK · Accident · No injuries · Limited investigation · Final report · Nov 15, 1999 · N5657A · Substantial damage
  > The pilot's intentional takeoff into known adverse weather. Factors associated with this accident are crosswinds, gusts, and downdrafts.
- [NTSB DEN00FA135](https://openairdocs.org/ntsb/DEN00FA135.md): Bellanca 17-30 · Lake City, CO · Accident · 2 fatal · Field investigation · Final report · Nov 10, 1999 · N6691V · Destroyed
  > the pilot's inadequate flight planning and preparation, and his inadvertent flight into adverse weather during a cross-country flight over mountainous terrain. Contributing factors were, the cloudy obscuration weather condition, the high density altitude, and…
- [NTSB FTW00LA026](https://openairdocs.org/ntsb/FTW00LA026.md): Waco KNF · Midway, AR · Accident · No injuries · Limited investigation · Final report · Nov 5, 1999 · N698N · Substantial damage
  > The inability of the pilot to maintain control of the airplane as a result of a downdraft.
- [NTSB ANC00LA009](https://openairdocs.org/ntsb/ANC00LA009.md): Piper PA-32-300 · Russian Mission, AK · Accident · No injuries · Limited investigation · Final report · Oct 28, 1999 · N31606 · Substantial damage
  > The pilot's continued flight into adverse weather, and an inadvertent stall. Factors in the accident were adverse weather consisting of icing conditions, and airframe icing.
- [NTSB ANC00LA008](https://openairdocs.org/ntsb/ANC00LA008.md): Cessna 207 · Bethel, AK · Accident · No injuries · Limited investigation · Final report · Oct 27, 1999 · N207SE · Substantial damage
  > The pilot's inadequate evaluation of the weather, and his decision to initiate flight into adverse weather conditions. Factors in the accident were adverse weather consisting of low ceilings and icing conditions, inadequate supervision by company management,…
- [NTSB ANC00LA011](https://openairdocs.org/ntsb/ANC00LA011.md): Piper PA-18-150 · Seward, AK · Accident · No injuries · Limited investigation · Final report · Oct 19, 1999 · N8918Y · Substantial damage
  > The pilot's inadequate compensation for wind conditions. Factors associated with the accident were a crosswind, and a downdraft.
- [NTSB LAX00FA017](https://openairdocs.org/ntsb/LAX00FA017.md): Cessna 152 · Ventura, CA · Accident · 2 fatal · Field investigation · Final report · Oct 16, 1999 · N5169B · Destroyed
  > the pilot's continued VFR flight into IMC. Contributing factors were the pilot's self induced pressure to depart the airport before the weather worsened and the airport closed, and the mountain obscurement and foggy weather conditions, and the night light…
- [NTSB LAX00LA009](https://openairdocs.org/ntsb/LAX00LA009.md): Schweizer SGS-2-33A · Waialua, HI · Accident · No injuries · Limited investigation · Final report · Oct 14, 1999 · N17914 · Substantial damage
  > The pilot's delay in recognizing the onset of a wind direction change resulting in the downward flow of wind on the leeward side of the mountain (strong sink rate).
- [NTSB DEN00LA002](https://openairdocs.org/ntsb/DEN00LA002.md): Piper PA-24-250 · La Junta, CO · Accident · Serious injuries · Limited investigation · Final report · Oct 2, 1999 · N6406P · Substantial damage
  > The pilot-in-command's failure to maintain a proper altitude during final approach to landing, and his misjudgment of altitude clearances. Factors were the sudden windshift, downdraft and turbulent weather conditions, the dark night, and the pilot's lack of…
- [NTSB NYC99LA240](https://openairdocs.org/ntsb/NYC99LA240.md): Airbus Industrie 319-131 · Sparta, NJ · Accident · Serious injuries · Limited investigation · Final report · Sep 30, 1999 · N821UA · No damage
  > The airplane's encounter with clear air turbulence.
- [NTSB ANC99LA149](https://openairdocs.org/ntsb/ANC99LA149.md): Bellanca 7GCBC · Fairbanks, AK · Accident · Minor injuries · Limited investigation · Final report · Sep 19, 1999 · N53728 · Substantial damage
  > The pilot's inadequate compensation for wind conditions. Factors in the accident were a windshear, and a short runway area.
- [NTSB ANC99LA147](https://openairdocs.org/ntsb/ANC99LA147.md): Cessna 185F · Pilot Point, AK · Accident · No injuries · Limited investigation · Final report · Sep 19, 1999 · N60859 · Substantial damage
  > The pilot's inadequate compensation for wind conditions. Factors in the accident were the pilot's inadequate evaluation of the weather conditions, a downdraft, and swampy terrain.
- [NTSB SEA99LA165](https://openairdocs.org/ntsb/SEA99LA165.md): Piper PA-28-180 · Eatonville, WA · Accident · Minor injuries · Limited investigation · Final report · Sep 17, 1999 · N7832N · Substantial damage
  > Inadequate inflight planning/preparation and terrain clearance not maintained. Mountainous terrain, cloudy conditions and delayed remedial action are factors
- [NTSB LAX99LA323](https://openairdocs.org/ntsb/LAX99LA323.md): Airbus Industrie A-320-231 · Beatty, NV · Accident · Serious injuries · Limited investigation · Final report · Sep 17, 1999 · N628AW · No damage
  > the failure of the injured passengers to remain seated with their seat belts fastened as directed by the captain.
- [NTSB ANC99FA139](https://openairdocs.org/ntsb/ANC99FA139.md): Eurocopter AS-350B-2 · Juneau, AK · Accident · Serious injuries · Field investigation · Final report · Sep 10, 1999 · N6007S · Destroyed
  > The pilot's continued flight into instrument meteorological conditions (IMC), and inadequate altitude/clearance. Factors associated with the accident were flat light and whiteout conditions, snow, and snow-covered terrain. An additional factor was the FAA's…
- [NTSB ATL99TA126](https://openairdocs.org/ntsb/ATL99TA126.md): Hughes OH-6A · Hernando, MS · Accident · No injuries · Final report · Sep 7, 1999 · N584SD · Substantial damage
  > The in-flight encounter with weather that resulted in the loss of tail rotor control. The pilot failed to maintain directional control and the helicopter collided with the ground.
- [NTSB DEN99LA156](https://openairdocs.org/ntsb/DEN99LA156.md): Piper PA-28-180 · Peyton, CO · Accident · Serious injuries · Limited investigation · Final report · Aug 31, 1999 · N5172L · Destroyed
  > The pilot's loss of control resulting in inadvertent stall/mush during initial climb following takeoff. Factors were the unfavorable, sudden windshift conditions, the high density altitude, and the manufacturer's failure to provide adequate density altitude…
- [NTSB LAX99LA288](https://openairdocs.org/ntsb/LAX99LA288.md): Wirth Avid Flyer · Schellville, CA · Accident · Minor injuries · Limited investigation · Final report · Aug 29, 1999 · N625F · Destroyed
  > The pilot's encounter with wind shear and a downdraft which precipitated his loss of airplane control.
- [NTSB SEA99FA150](https://openairdocs.org/ntsb/SEA99FA150.md): Cessna 182E · Ryegate, MT · Accident · 4 fatal · Field investigation · Final report · Aug 28, 1999 · N2886Y · Destroyed
  > The pilot's continued VFR flight into IMC conditions and his failure to maintain clearance from mountainous terrain. Factors include low ceilings and inadequate in-flight planning.
- [NTSB NYC99FA214](https://openairdocs.org/ntsb/NYC99FA214.md): Cessna 172N · Dyke, VA · Accident · 4 fatal · Field investigation · Final report · Aug 25, 1999 · N733DH · Destroyed
  > The pilot's inadvertent flight into instrument meteorological conditions, which resulted in his inability to see the rapidly rising terrain. A factor was the pilot's inaccurate evaluation of the weather.
- [NTSB LAX99LA285](https://openairdocs.org/ntsb/LAX99LA285.md): Burkhart Grob G 103 Twin II · Llano, CA · Accident · No injuries · Limited investigation · Final report · Aug 23, 1999 · N8013K · Substantial damage
  > The pilot's encounter with a sudden and violent dust devil, which caused the student pilot to lose control of the aircraft during the landing flare/touchdown.
- [NTSB ANC99LA123](https://openairdocs.org/ntsb/ANC99LA123.md): Bellanca 8GCBC · Wasilla, AK · Accident · Minor injuries · Limited investigation · Final report · Aug 23, 1999 · N5047Y · Substantial damage
  > The pilot's inadequate compensation for wind conditions. Factors associated with the accident were variable winds, and a downdraft.
- [NTSB LAX99LA280](https://openairdocs.org/ntsb/LAX99LA280.md): Piper PA-18-18 · Eagleville, CA · Accident · No injuries · Limited investigation · Final report · Aug 22, 1999 · N3356B · Substantial damage
  > The pilot's encounter with a thunderstorm induced downdraft, which resulted in a high rate of sink, at an altitude insufficient to provide for recovery prior to ground impact. The high density altitude was a factor in the accident.
- [NTSB ANC99LA118](https://openairdocs.org/ntsb/ANC99LA118.md): Cessna 206 · Anaktuvuk Pass, AK · Accident · No injuries · Limited investigation · Final report · Aug 22, 1999 · N5446X · Substantial damage
  > The pilot's continued flight into adverse weather conditions after becoming lost/disoriented. Factors in the accident were rising terrain, a blind/box canyon, and weather conditions consisting of clouds, rain, and fog.
- [NTSB LAX99FA273](https://openairdocs.org/ntsb/LAX99FA273.md): Balloon Works Firefly 11 · Cave Creek, AZ · Accident · Serious injuries · Field investigation · Final report · Aug 19, 1999 · N7021U · Minor damage
  > An unforecast encounter with a low level microburst that resulted in a distortion of the balloon envelope, an excessive outflow of hot air (loss of lift), creating an excessive rate of descent that was beyond the performance capability of the balloon to…
- [NTSB NYC99GA197](https://openairdocs.org/ntsb/NYC99GA197.md): Bell 407 · Georgetown, DE · Accident · Minor injuries · Final report · Aug 17, 1999 · N97SP · Destroyed
  > The pilot's improper preflight evaluation of the weather, which resulted in inadvertent flight into IMC. Factors were the fog, and night conditions.
- [NTSB NYC99FA199](https://openairdocs.org/ntsb/NYC99FA199.md): Cessna P210N · Worcester, VT · Accident · 3 fatal · Field investigation · Final report · Aug 14, 1999 · N24CD · Destroyed
  > The pilot's inadequate in-flight planning/decision, his failure to follow the published instrument departure procedure for the particular runway, and his continued flight into known adverse weather. A factor was thunderstorms.
- [NTSB NYC99FA198](https://openairdocs.org/ntsb/NYC99FA198.md): Cessna 210 · Mount Pocono, PA · Accident · 2 fatal · Field investigation · Final report · Aug 13, 1999 · N4827C · Destroyed
  > The pilot's continued VFR flight into instrument meteorological conditions and his failure to maintain aircraft control. A related factor was the fog.
- [NTSB CHI99FA290](https://openairdocs.org/ntsb/CHI99FA290.md): Piper PA-28-181 · Paw Paw, MI · Accident · 4 fatal · Field investigation · Final report · Aug 13, 1999 · N281PF · Destroyed
  > the pilot flew into known adverse weather, the pilot's lack of total instrument flight experience, and the pilot exceeded the design limits of the airplane. Factors included the pilot's total lack of experience in the type of operation and the pilot's…
- [NTSB FTW99LA219](https://openairdocs.org/ntsb/FTW99LA219.md): Grumman American AA-5A · Wayton, AR · Accident · Serious injuries · Limited investigation · Final report · Aug 12, 1999 · N9775U · Substantial damage
  > The pilot's inadequate compensation for wind conditions, and his failure to maintain clearance with trees during a go-around. Factors were the gusty wind condition, and the high density altitude. Factors associated with the accident were gusty winds, and a…
- [NTSB MIA99LA218](https://openairdocs.org/ntsb/MIA99LA218.md): Cessna 150G · Greeneville, TN · Accident · Minor injuries · Limited investigation · Final report · Aug 9, 1999 · N3187X · Substantial damage
  > The pilot's failure to remain clear of clouds while operating under visual flight rules resulting in the aircraft colliding with trees on rising terrain as he flew in the clouds.
- [NTSB ANC99FA106](https://openairdocs.org/ntsb/ANC99FA106.md): Cessna 180A · Kenai, AK · Accident · 2 fatal · Field investigation · Final report · Aug 5, 1999 · N8TL · Destroyed
  > The pilot's intentional visual flight into known adverse weather. Factors associated with this accident were the reported low ceilings, obscuration, high winds, and turbulence.
- [NTSB FTW99LA197](https://openairdocs.org/ntsb/FTW99LA197.md): Piper PA-25-235 · Fabens, TX · Accident · Serious injuries · Limited investigation · Final report · Jul 22, 1999 · N6736Z · Substantial damage
  > The pilot's inadvertent flight into adverse weather conditions. A factor was the windshear weather conditions.
- [NTSB DEN99FA123](https://openairdocs.org/ntsb/DEN99FA123.md): Piper PA-32R-301T · Magdalena, NM · Accident · 2 fatal · Field investigation · Final report · Jul 19, 1999 · N22KC · Destroyed
  > The pilot's inadvertent flight into adverse weather and the subsequent in-flight breakup. Factors were the pilot's lack of experience in high altitude flying and the thunderstorm.
- [NTSB SEA99FA126](https://openairdocs.org/ntsb/SEA99FA126.md): Cessna T-337 G-P · Snoqualmie Pass, WA · Accident · 2 fatal · Field investigation · Final report · Jul 17, 1999 · N98C · Destroyed
  > The pilot's failure to maintain clearance from mountainous terrain while maneuvering below low ceilings. Factors include low ceilings and inadequate in-flight planning.
- [NTSB CHI99FA238](https://openairdocs.org/ntsb/CHI99FA238.md): Piper PA-28-181 · Yorkville, IL · Accident · 2 fatal · Field investigation · Final report · Jul 17, 1999 · N5054F · Destroyed
  > the pilot continuing into known adverse weather conditions, attempting low altitude flight, and not maintaining terrain clearance. Factors to the accident were the thunderstorm and the improper weather evaluation by the pilot following pre-departure and…
- [NTSB IAD99FA052](https://openairdocs.org/ntsb/IAD99FA052.md): Boeing 737-824 · Atlantic Ocean (Atlantic Ocean) · Accident · Serious injuries · Field investigation · Final report · Jul 8, 1999 · N12221 · Minor damage
  > the aircrew's inadvertent encounter with unforecast clear air turbulence.
- [NTSB DEN99FA114](https://openairdocs.org/ntsb/DEN99FA114.md): Cessna 182J · La Veta, CO · Accident · 2 fatal · Field investigation · Final report · Jul 6, 1999 · N3334F · Destroyed
  > The pilot's inadvertent flight into instrument meteorological conditions and his failure to maintain control of the aircraft. Factors were low ceiling and the pilot's lack of instrument experience.
- [NTSB CHI99LA207](https://openairdocs.org/ntsb/CHI99LA207.md): Piper J-3C · Independence, IA · Accident · No injuries · Limited investigation · Final report · Jul 2, 1999 · N3371N · Substantial damage
  > The insufficient information from the weather forecast resulting in an in-flight encounter with turbulence/gusts and the subsequent precautionary landing. Contributing factors were the gusty/turbulent conditions and the terrain condition (crop).
- [NTSB FTW99LA207](https://openairdocs.org/ntsb/FTW99LA207.md): Boeing 737-3H4 · Lafayette, LA · Accident · Serious injuries · Limited investigation · Final report · Jun 26, 1999 · N650SW · No damage
  > The pilot's inadvertent flight into an adverse weather condition. A factor was the turbulence.
- [NTSB CHI99FA196](https://openairdocs.org/ntsb/CHI99FA196.md): Beech C-23 · Mandan, ND · Accident · 1 fatal · Field investigation · Final report · Jun 26, 1999 · N9703Q · Destroyed
  > the pilot failed to maintain aircraft control on approach to the airport after encountering high winds, gusts, rain, and thunderstorms in the area.
- [NTSB MIA99FA188](https://openairdocs.org/ntsb/MIA99FA188.md): Beech C90 · Munson, FL · Accident · 2 fatal · Field investigation · Final report · Jun 25, 1999 · N3019W · Destroyed
  > The poor in-flight weather evaluation by the pilot-in-command and his operation of the airplane at an indicated airspeed greater than the design maneuvering speed (Va) in a thunderstorm contrary to the pilot's operating handbook resulting in an in-flight…
- [NTSB LAX99LA228](https://openairdocs.org/ntsb/LAX99LA228.md): Let Blanik L-13 · Barstow, CA · Accident · No injuries · Limited investigation · Final report · Jun 19, 1999 · N136AS · Substantial damage
  > The loss of thermal lift that resulted in a forced landing and the pilot's improper glide path that resulted in a collision with a light pole.

Next page: https://openairdocs.org/ntsb.md?year=1999&occurrence=240&page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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 year(c."eventDate") = 1999
  AND c."mKey" IN (SELECT o.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o."occurrenceNumber" = 1 AND o."occurrenceCode" = 240)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?occurrence=240&year=1999

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