# NTSB investigations, 1990, MT

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.

## Latest cases

- [NTSB SEA91LA040](https://openairdocs.org/ntsb/SEA91LA040.md): Swearingen SA-227 · Kalispell, MT · Accident · No injuries · Limited investigation · Final report · Dec 31, 1990 · N385PH · Substantial damage
  > The flight crew's inablity to maintain directional control after landing in snow-depth conditions that had been erroneously reported as being within operating limitations.
- [NTSB SEA91LA031](https://openairdocs.org/ntsb/SEA91LA031.md): Beech 3NM · Bozeman, MT · Accident · No injuries · Limited investigation · Final report · Dec 9, 1990 · N9159B · Substantial damage
  > The failure of the right engine master rod.
- [NTSB SEA91LA004](https://openairdocs.org/ntsb/SEA91LA004.md): Piper PA28-140 · Hamilton, MT · Accident · No injuries · Limited investigation · Final report · Oct 11, 1990 · N6660W · Substantial damage
  > The pilot's inadequate compensation for wind conditions.
- [NTSB SEA90LA193](https://openairdocs.org/ntsb/SEA90LA193.md): Cessna 170 · Havre, MT · Accident · No injuries · Limited investigation · Final report · Sep 21, 1990 · N4289V · Substantial damage
  > The selection of the wrong runway by the owner/student pilot and his failure to compensate for the wind during landing ground roll.
- [NTSB SEA90LA191](https://openairdocs.org/ntsb/SEA90LA191.md): Cessna 172N · Dillon, MT · Accident · No injuries · Limited investigation · Final report · Sep 11, 1990 · N5345D · Substantial damage
  > Pilot misjudged the flare that resulted in a bounced landing.
- [NTSB SEA90LA181](https://openairdocs.org/ntsb/SEA90LA181.md): Cessna U206 · Lewistown, MT · Accident · No injuries · Limited investigation · Final report · Sep 6, 1990 · N2107F · Substantial damage
  > The pilot did not maintain an adequate lookout while maneuvering which resulted in a collision with a transmission wire.
- [NTSB SEA90FA165](https://openairdocs.org/ntsb/SEA90FA165.md): Piper PA-30-160 · Kalispell, MT · Accident · 4 fatal · Field investigation · Final report · Aug 20, 1990 · N8556Y · Destroyed
  > Failure of the pilot to flare the aircraft for landing and to maintain its control during the attempted go-around (aborted landing). Factors related to the accident were: darkness, a number of runway edge lights that were either inoperative or hidden by…
- [NTSB SEA90LA164](https://openairdocs.org/ntsb/SEA90LA164.md): Cessna A185F · Ovando, MT · Accident · No injuries · Limited investigation · Final report · Aug 15, 1990 · N8343Q · Substantial damage
  > The pilot's misjudgement of altitude and distance to the runway, while on final approach, and his failure to attain the proper touchdown point for landing. The fence was a related factor.
- [NTSB SEA90IA161](https://openairdocs.org/ntsb/SEA90IA161.md): Boeing 727-224 · Belgrade, MT · Incident · No injuries · Incident investigation · Final report · Aug 12, 1990 · N69735 · Minor damage
  > The malfunction of the starter control valve.
- [NTSB SEA90LA154](https://openairdocs.org/ntsb/SEA90LA154.md): Cessna 188B · Denton, MT · Accident · No injuries · Limited investigation · Final report · Aug 3, 1990 · N9632G · Substantial damage
  > The premature liftoff during takeoff ground roll by the pilot, resulting in a stall.
- [NTSB SEA90LA150](https://openairdocs.org/ntsb/SEA90LA150.md): Glasflugel H 301 Libelle · Thompson Falls, MT · Accident · No injuries · Limited investigation · Final report · Jul 29, 1990 · N4166A · Substantial damage
  > A disabled aircraft blocking the active runway.
- [NTSB SEA90LA148](https://openairdocs.org/ntsb/SEA90LA148.md): Bell BH-214 · Thompson Falls, MT · Accident · No injuries · Limited investigation · Final report · Jul 28, 1990 · N314RM · Substantial damage
  > Crew's encounter with soft terrain while attempting an autorotation landing after the failure of the main rotor drive system.
- [NTSB SEA90LA144](https://openairdocs.org/ntsb/SEA90LA144.md): Piper PA-18-150 · Jordan, MT · Accident · Serious injuries · Limited investigation · Final report · Jul 24, 1990 · N4184Z · Substantial damage
  > Pilot's failure to switch fuel tanks and the unsuitable terrain available for a forced landing.
- [NTSB SEA90LA145](https://openairdocs.org/ntsb/SEA90LA145.md): Maule M-4-220C · Missoula, MT · Accident · No injuries · Limited investigation · Final report · Jul 21, 1990 · N2007U · Substantial damage
  > Pilot's failure to maintain directional control during the landing roll.
- [NTSB SEA90LA142](https://openairdocs.org/ntsb/SEA90LA142.md): Piper PA-18-150 · Dupuyer, MT · Accident · Minor injuries · Limited investigation · Final report · Jul 21, 1990 · N4153Z · Substantial damage
  > Pilot's misjudged touchdown and delay in initiating the balked landing.
- [NTSB SEA90LA137](https://openairdocs.org/ntsb/SEA90LA137.md): Sikorsky S-58BT · Ovando, MT · Accident · No injuries · Limited investigation · Final report · Jul 16, 1990 · N439DS · Substantial damage
  > The pilot did not maintain rotor RPM after a compressor assembly blade failure. A related factor was an inadequate autorotation resulting in a hard landing.
- [NTSB DEN90LA153](https://openairdocs.org/ntsb/DEN90LA153.md): Cessna 182 · Miles City, MT · Accident · Minor injuries · Limited investigation · Final report · Jul 6, 1990 · N5665B · Substantial damage
  > The failure of the pilot to use carburetor heat during descent for landing, resulting in a loss of power.
- [NTSB DEN90FA139](https://openairdocs.org/ntsb/DEN90FA139.md): Piper PA-18 · Laurel, MT · Accident · 2 fatal · Field investigation · Final report · Jun 22, 1990 · N9926D · Destroyed
  > The pilot's failure to maintain proper clearance from other objects wwhile maneuvering.
- [NTSB DEN90LA130](https://openairdocs.org/ntsb/DEN90LA130.md): Cessna 182N · Condon, MT · Accident · Minor injuries · Limited investigation · Final report · Jun 9, 1990 · N8961G · Destroyed
  > The pilot's failure to abort the takeoff.
- [NTSB DEN90LA132](https://openairdocs.org/ntsb/DEN90LA132.md): Lund Mustang II · Hamilton, MT · Accident · No injuries · Limited investigation · Final report · Jun 5, 1990 · N81BL · Substantial damage
  > The inadequate compensation for the wind conditions by the pilot.
- [NTSB DEN90LA122](https://openairdocs.org/ntsb/DEN90LA122.md): Piper PA-38-112 · Belgrade, MT · Accident · Serious injuries · Limited investigation · Final report · Jun 3, 1990 · N9375T · Destroyed
  > The inadvertent stall experienced during the attempted forced landing.
- [NTSB DEN90LA108](https://openairdocs.org/ntsb/DEN90LA108.md): Piper PA-18-150 · Powderville, MT · Accident · No injuries · Limited investigation · Final report · May 10, 1990 · N62672 · Substantial damage
  > Pilot failed to maintain terrain clearance during descent on an aerial application swath run, resulting in an in flight collision with the terrain. That the pilot misjudged the pull up altitude is considered a contributing factor.
- [NTSB DEN90LA105](https://openairdocs.org/ntsb/DEN90LA105.md): Cessna C-180E · Helena, MT · Accident · No injuries · Limited investigation · Final report · May 6, 1990 · N8679X · Substantial damage
  > The malfunction of the tail wheel assembly.
- [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 DEN90LA088](https://openairdocs.org/ntsb/DEN90LA088.md): Piper PA-28-140 · Forsyth, MT · Accident · Serious injuries · Limited investigation · Final report · Apr 8, 1990 · N5628U · Substantial damage
  > An unexplained loss of engine power. A factor was the rough unsuitable terrain in which the forced landing was made.
- [NTSB DEN90LA083](https://openairdocs.org/ntsb/DEN90LA083.md): Peterson KIT FOX Model 1 · Highwood, MT · Accident · No injuries · Limited investigation · Final report · Apr 2, 1990 · N87BS · Substantial damage
  > A premature lift-off by the pilot, resulting in a stall/mush.
- [NTSB DEN90LA082](https://openairdocs.org/ntsb/DEN90LA082.md): Piper PA-18-150 · Whitewater, MT · Accident · No injuries · Limited investigation · Final report · Mar 28, 1990 · N7134K · Substantial damage
  > Pilot's delayed use of carburetor heat and the subsequent induction icing related partial power loss. Contributing factors were the carburetor icing conditions and the unsuitable terrain in which the forced landing was performed.
- [NTSB DEN90LA087](https://openairdocs.org/ntsb/DEN90LA087.md): Cessna 172M · Three Forks, MT · Accident · No injuries · Limited investigation · Final report · Mar 21, 1990 · N80830 · Substantial damage
  > Pilot's misjudged landing flare.
- [NTSB DEN90LA075](https://openairdocs.org/ntsb/DEN90LA075.md): Cessna 172 · Elkhorn, MT · Accident · No injuries · Limited investigation · Final report · Mar 18, 1990 · N61918 · Substantial damage
  > The pilot's decision to attempt flight in terrain and conditions which exceeded the performance capabilities of the airplane.
- [NTSB DEN90LA067](https://openairdocs.org/ntsb/DEN90LA067.md): Heindenreich Fokker DR-1 · Kalispell, MT · Accident · Minor injuries · Limited investigation · Final report · Feb 23, 1990 · N72517 · Substantial damage
  > Failure of the pilot to maintain adequate airspeed, which resulted in a stall. His lack of familiarity with this aircraft was a related factor.
- [NTSB DEN90LA060](https://openairdocs.org/ntsb/DEN90LA060.md): Cessna T207 · Hungry Horse, MT · Accident · Minor injuries · Limited investigation · Final report · Feb 22, 1990 · N91146 · Destroyed
  > Failure of the #4 connecting rod. Factors related to the accident were: the adverse weather conditions and lack of suitable terrain for a forced landing.
- [NTSB DEN90LA052](https://openairdocs.org/ntsb/DEN90LA052.md): Cessna 180C · Haugan, MT · Accident · No injuries · Limited investigation · Final report · Feb 8, 1990 · N9342T · Substantial damage
  > The failure of the pilot to maintain directional control during the takeoff attempt. A factor in the accident was the icy, snow covered condition of the takeoff area.

## 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") = 1990
  AND c."eventStateOrRegion" = 'MT' AND c."eventCountry" = 'USA'
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?state=MT&year=1990

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