# NTSB investigations, 1999, 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 SEA00LA032](https://openairdocs.org/ntsb/SEA00LA032.md): Cessna 140 · Helena, MT · Accident · No injuries · Limited investigation · Final report · Dec 15, 1999 · N2739N · Substantial damage
  > Separation of the left main landing gear. Factors include inadequate preflight inspection by the pilot, and inadequate inspection at the time of annual inspection by maintenance personnel.
- [NTSB SEA00FA031](https://openairdocs.org/ntsb/SEA00FA031.md): Mooney M20-M · Missoula, MT · Accident · 1 fatal · Field investigation · Final report · Dec 12, 1999 · N270BB · Destroyed
  > Engine failure for undetermined reasons. Factors include the lack of suitable terrain for an emergency landing, trees and mountainous terrain.
- [NTSB SEA00LA020](https://openairdocs.org/ntsb/SEA00LA020.md): Bell 206L-1 · Neihart, MT · Accident · No injuries · Limited investigation · Final report · Nov 17, 1999 · N519EH · Substantial damage
  > Clearance from an object was not maintained. Gusting wind conditions was a factor.
- [NTSB SEA00LA005](https://openairdocs.org/ntsb/SEA00LA005.md): Beech S35 · Melstone, MT · Accident · No injuries · Limited investigation · Final report · Oct 21, 1999 · N8811M · Substantial damage
  > Loss of engine power for undetermined reasons.
- [NTSB SEA00LA003](https://openairdocs.org/ntsb/SEA00LA003.md): Maule M-5-235C · Laurel, MT · Accident · No injuries · Limited investigation · Final report · Oct 21, 1999 · N6147M · Substantial damage
  > The pilot's inadequate compensation for wind conditions. Factors include a dust devil/whirlwind at the location where the pilot was trying to land.
- [NTSB SEA00LA006](https://openairdocs.org/ntsb/SEA00LA006.md): Piper PA-24-250 · Bozeman, MT · Accident · Minor injuries · Limited investigation · Final report · Oct 20, 1999 · N8078P · Substantial damage
  > The pilot-in-command's (CFI) failure to take remedial action. Factors include the private pilot letting the airspeed get too low.
- [NTSB SEA99LA154](https://openairdocs.org/ntsb/SEA99LA154.md): Bellanca 7GCBC · Columbus, MT · Accident · No injuries · Limited investigation · Final report · Sep 4, 1999 · N8525 · Substantial damage
  > The pilot's failure to maintain directional control. A wet runway surface was a factor.
- [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 SEA99LA147](https://openairdocs.org/ntsb/SEA99LA147.md): Cessna 180A · Belgrade, MT · Accident · No injuries · Limited investigation · Final report · Aug 21, 1999 · N5359D · Substantial damage
  > Clearance from objects was not maintained during taxiing. Factors include the pilot's inadequate visual lookout.
- [NTSB SEA99FA138](https://openairdocs.org/ntsb/SEA99FA138.md): Beech H-35 · Swan Lake, MT · Accident · Serious injuries · Field investigation · Final report · Aug 10, 1999 · N7975D · Substantial damage
  > Detonation/pre-ignition due to use of improper grade and type of fuel (automotive) and the pilot-in-command's failure to use proper fuel specified by manufacturer's directives.
- [NTSB SEA99LA139](https://openairdocs.org/ntsb/SEA99LA139.md): Cessna 188B · Sidney, MT · Accident · No injuries · Limited investigation · Final report · Aug 9, 1999 · N9085R · Substantial damage
  > The pilot's failure to adequately compensate for wind conditions.
- [NTSB SEA99LA135](https://openairdocs.org/ntsb/SEA99LA135.md): Quicksilver MX II A-HP · Coram, MT · Accident · Minor injuries · Limited investigation · Final report · Jul 20, 1999 · UNREG · Substantial damage
  > The non-rated pilot's failure to maintain clearance from trees while taking off from a gravel pit. Factors include a downdraft.
- [NTSB SEA99LA118](https://openairdocs.org/ntsb/SEA99LA118.md): Piper PA-18-150 · Opheim, MT · Accident · 1 fatal · Limited investigation · Final report · Jul 14, 1999 · N4385Z · Substantial damage
  > The pilot's failure to maintain an airspeed above stall speed (Vs), resulting in a stall/mush into the terrain during a course reversal at the end of an aerial application run. Factors include hilly terrain and high density altitude.
- [NTSB SEA99LA102](https://openairdocs.org/ntsb/SEA99LA102.md): Cessna 182Q · Conner, MT · Accident · No injuries · Limited investigation · Final report · Jul 6, 1999 · N759MZ · Substantial damage
  > The pilot's attempt to take off on an unsuitable runway surface due to standing water on the runway. Factors include standing water on the airstrip.
- [NTSB SEA99LA103](https://openairdocs.org/ntsb/SEA99LA103.md): Piper PA-22 · Billings, MT · Accident · No injuries · Limited investigation · Final report · Jul 1, 1999 · N3513A · Substantial damage
  > The separation of the left main landing gear shock strut for undetermined reasons.
- [NTSB SEA99LA095](https://openairdocs.org/ntsb/SEA99LA095.md): Cessna A188B · Big Sandy, MT · Accident · Minor injuries · Limited investigation · Final report · Jun 24, 1999 · N4788Q · Substantial damage
  > The pilot's failure to maintain clearance between the wire and his aircraft. A transmission wire and downdraft were factors.
- [NTSB SEA99LA091](https://openairdocs.org/ntsb/SEA99LA091.md): Cessna 180G · Kalispell, MT · Accident · No injuries · Limited investigation · Final report · Jun 19, 1999 · N4707U · Substantial damage
  > An encounter with a crosswind gust, which was not possible to compensate for.
- [NTSB SEA99LA087](https://openairdocs.org/ntsb/SEA99LA087.md): Let L-13 · Belgrade, MT · Accident · No injuries · Limited investigation · Final report · Jun 17, 1999 · N70741 · Substantial damage
  > The pilot in command's failure to maintain clearance from a parked airplane during his attempt to avoid a person on the runway.
- [NTSB SEA99LA083](https://openairdocs.org/ntsb/SEA99LA083.md): Piper PA-24-250 · Plentywood, MT · Accident · No injuries · Limited investigation · Final report · Jun 9, 1999 · N5309P · Substantial damage
  > The pilot's failure to ensure that the landing gear were properly down and locked for landing.
- [NTSB SEA99LA081](https://openairdocs.org/ntsb/SEA99LA081.md): D. Wayne Smith Wayncraft 14 · Libby, MT · Accident · 1 fatal · Limited investigation · Final report · Jun 6, 1999 · N58WS · Substantial damage
  > Collision with terrain for undetermined reasons.
- [NTSB SEA99LA078](https://openairdocs.org/ntsb/SEA99LA078.md): Cessna 182K · Kalispell, MT · Accident · No injuries · Limited investigation · Final report · May 22, 1999 · N2656R · Substantial damage
  > A loss of engine power for undetermined reasons. Rough terrain was a factor.
- [NTSB SEA99LA061](https://openairdocs.org/ntsb/SEA99LA061.md): Eugene Hughes Lancair IV · Butte, MT · Accident · No injuries · Limited investigation · Final report · May 8, 1999 · N124GH · Substantial damage
  > The pilot's improper flare.
- [NTSB SEA99LA050](https://openairdocs.org/ntsb/SEA99LA050.md): Piper PA-18 · Boulder, MT · Accident · No injuries · Limited investigation · Final report · Apr 10, 1999 · N4036E · Substantial damage
  > The pilot-in-command's failure to maintain directional control after encountering a dust-devil during landing rollout, resulting in a ground loop and collapse of the main landing gear. Factors include the dust-devil.
- [NTSB SEA99LA034](https://openairdocs.org/ntsb/SEA99LA034.md): Cessna 182A · Conner, MT · Accident · No injuries · Limited investigation · Final report · Feb 13, 1999 · N3753D · Substantial damage
  > The pilots delayed remedial action during an aborted landing. Factors include a slush-covered runway.

## 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."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=1999

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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.