# NTSB investigations, MT: Unknown

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 WPR26FA031](https://openairdocs.org/ntsb/WPR26FA031.md): Robinson Helicopter R66 · Ekalaka, MT · Accident · 4 fatal · Class 3 · Field · Preliminary report · Oct 23, 2025 · N67GA · Substantial damage
  > On October 22, 2025, about 1830 mountain daylight time, a Robinson Helicopter Co. R66, N67GA, was substantially damaged when it was involved in an accident near Ekalaka, Montana. The pilot and 3 passengers were fatally injured. The helicopter was operated as…
- [NTSB WPR25FA214](https://openairdocs.org/ntsb/WPR25FA214.md): Piper PA-28-180 · West Yellowstone, MT · Accident · 3 fatal · Class 3 · Field · Preliminary report · Jul 18, 2025 · N7186W · Substantial damage
  > On July 17, 2025, about 2358 mountain daylight time, a Piper PA-28-180, N7186W, was substantially damaged when it was involved in an accident near West Yellowstone, Montana. The pilot and two pilot rated passengers were fatally injured. The airplane was…
- [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 SEA98FA101](https://openairdocs.org/ntsb/SEA98FA101.md): Piper PA-46-350P · Bigfork, MT · Accident · 2 fatal · Field investigation · Final report · Apr 11, 1998 · N9247W · Destroyed
  > The pilot's failure to maintain terrain clearance for undetermined reasons. Contributing factors were the mountainous terrain, trees, dark night conditions, clouds and pilot fatigue.
- [NTSB SEA96FA170](https://openairdocs.org/ntsb/SEA96FA170.md): Piper PA-28R-200 · Libby, MT · Accident · 3 fatal · Field investigation · Final report · Jul 26, 1996 · N3071R · Destroyed
  > collision with rising mountainous terrain for unknown reason(s).
- [NTSB SEA94FA237](https://openairdocs.org/ntsb/SEA94FA237.md): Piper J3C-65 · Dixon, MT · Accident · 2 fatal · Field investigation · Final report · Sep 9, 1994 · N42056 · Destroyed
  > The pilot in command's allowing the aircraft airspeed to decrease below the stall speed.
- [NTSB DEN84FA086](https://openairdocs.org/ntsb/DEN84FA086.md): Cessna T210M · Sidney, MT · Accident · 1 fatal · Field investigation · Final report · Feb 7, 1984 · N7399M · Destroyed
  > Richland flt #101, a bank check courier flt, departed VFR with 180 lbs of cargo. Six minutes prior to the crash, the last radio transmission from the acft was heard concerning a routine landing wx advisory. The acft crashed aprx 45 degs nose low, gear & flaps…
- [NTSB DEN83FA008](https://openairdocs.org/ntsb/DEN83FA008.md): Luscombe T-8F · Choteau, MT · Accident · 2 fatal · Field investigation · Final report · Oct 14, 1982 · N2231B · Substantial damage
  > The PIC was a designated pilot examiner. The purpose of the flt was to give the PIC opportunity to fly the acft from the rear seat as he was planning to give flt instruction in the acft in the near future. As FAR as could be determined, the PIC had never…
- [NTSB DEN82DA036](https://openairdocs.org/ntsb/DEN82DA036.md): Piper PA-18 · Plentywood, MT · Accident · Minor injuries · Final report · Feb 14, 1982 · N4380Z · Substantial damage
  > On 2/16/82, the county sheriff received information that the pilot had wrecked his aircraft on 2/13/82. He went to the scene and observed the aircraft in an inverted position on snow covered terrain. On 2/20/82, he received information that the pilot had…
- [NTSB SEA79FA003](https://openairdocs.org/ntsb/SEA79FA003.md): Piper PA-18S · Bozeman, MT · Accident · 2 fatal · Closed · Oct 13, 1978 · N302T · Destroyed
- [NTSB SEA76FTA22](https://openairdocs.org/ntsb/SEA76FTA22.md): Cessna 177 · Hardin, MT · Accident · No injuries · Closed · Jun 5, 1976 · N34525 · Substantial damage
- [NTSB SEA67F0137](https://openairdocs.org/ntsb/SEA67F0137.md): Callair A-4 · Lavina, MT · Accident · Serious injuries · Closed · Jun 18, 1966 · N6166C · Substantial damage

## 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."eventStateOrRegion" = 'MT' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 990)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/990/cases?state=MT

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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.