# NTSB investigations, CO: 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 CEN26LA254](https://openairdocs.org/ntsb/CEN26LA254.md): Tag Aviation PTY Titanium Explorer · Larkspur, CO · Accident · 1 fatal · Class 3 · Limited · Preliminary report · Jul 13, 2026 · N665TE · Substantial damage
  > On July 13, 2026, about 800 mountain daylight time, a Tag Aviation Pty Ltd Titanium Explorer gyrocopter, N665TE was substantially damaged when it was involved in an accident near Larkspur, Colorado. The pilot passed away in the hospital five days after the…
- [NTSB CEN25FA106](https://openairdocs.org/ntsb/CEN25FA106.md): Vans RV7 · Matheson, CO · Accident · 1 fatal · Class 3 · Field · Preliminary report · Mar 1, 2025 · N902T · Substantial damage
  > On March 1, 2025, about 1215 mountain daylight time, a Vans RV7 experimental airplane, N902T, was destroyed when it was involved in an accident near Matheson, Colorado. The pilot sustained fatal injuries. The airplane was operated as a Title 14 Code of…
- [NTSB CEN25FA040](https://openairdocs.org/ntsb/CEN25FA040.md): Beech 35-B33 · Nunn, CO · Accident · 1 fatal · Class 3 · Field · Preliminary report · Nov 15, 2024 · N285BW · Destroyed
  > On November 15, 2024, about 1000 mountain standard time (MST), a Beech 35-B33, N285BW, was destroyed when it was involved in an accident near Nunn, Colorado. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations…
- [NTSB CEN22LA137](https://openairdocs.org/ntsb/CEN22LA137.md): Cessna P210N · Englewood, CO · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 8, 2022 · N210GE · Destroyed
  > A total loss of engine power on short final for reasons that could not be determined based on the available evidence.
- [NTSB CEN21LA414](https://openairdocs.org/ntsb/CEN21LA414.md): Cessna 172S · LaSalle, CO · Accident · Minor injuries · Class 3 · Limited · Final report · Sep 10, 2021 · N2099J · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB CEN21LA404](https://openairdocs.org/ntsb/CEN21LA404.md): Cessna 182 · Delta, CO · Accident · No injuries · Class 3 · Limited · Final report · Sep 3, 2021 · N9114W · Substantial damage
  > A total loss of engine power that resulted in a forced landing and subsequent noseover. The reason for the total loss of engine power could not be determined based on the available evidence.
- [NTSB CEN11LA239](https://openairdocs.org/ntsb/CEN11LA239.md): Glasflugel Standard Libelle · Wellington, CO · Accident · 1 fatal · Limited investigation · Final report · Mar 20, 2011 · N99AE · Substantial damage
  > The pilot's loss of glider control due to impairment or incapacitation caused by an episode of ventricular tachycardia.
- [NTSB CEN10FA458](https://openairdocs.org/ntsb/CEN10FA458.md): Beech C35 · Rollinsville, CO · Accident · 3 fatal · Field investigation · Final report · Aug 4, 2010 · N8974A · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB FTW97LA047](https://openairdocs.org/ntsb/FTW97LA047.md): Cessna 182E · Alamosa, CO · Accident · No injuries · Limited investigation · Final report · Nov 12, 1996 · N3293Y · Substantial damage
  > aircraft damage for undetermined rteasons.
- [NTSB DEN93LA014](https://openairdocs.org/ntsb/DEN93LA014.md): Champion 7KCAB · Boulder, CO · Accident · No injuries · Limited investigation · Final report · Dec 2, 1992 · N2751G · Substantial damage
  > Undetermined.
- [NTSB DEN93IA005](https://openairdocs.org/ntsb/DEN93IA005.md): Mcdonnell Douglas DC-9-82 · Denver, CO · Incident · No injuries · Incident investigation · Final report · Oct 13, 1992 · N72822 · Minor damage
  > An inadvertent attempt, by unknown persons, to start the APU which had been placarded as inoperative. Factors were: inadequate procedures in rendering the APU incapable of being started when inoperative.
- [NTSB DEN92LA043](https://openairdocs.org/ntsb/DEN92LA043.md): Cessna 172Q · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Mar 18, 1992 · N66076 · Substantial damage
  > Undetermined.
- [NTSB DEN84FA231](https://openairdocs.org/ntsb/DEN84FA231.md): Cessna 182P · Climax, CO · Accident · 4 fatal · Field investigation · Final report · Nov 14, 1983 · N7292S · Destroyed
  > The wreckage of N7292S was located by the Colorado civil air patrol on July 22, 1984. An on-scene examination of the wreckage revealed that the acft had impacted tall pine trees in a near vertical right hand spiral maneuver. Impact forces destroyed the acft…
- [NTSB FTW83FAMS1](https://openairdocs.org/ntsb/FTW83FAMS1.md): Piper PA-34-220T · Durango, CO · Accident · 4 fatal · Missing aircraft · Final report · Nov 2, 1982 · N80960 · Destroyed
  > The aircraft originally departed helena, mt on a flight believed to be to taos, NM. A landing was made at ogden, ut where the plane was serviced with 47.5 gal of fuel. The last radio communication was at 1735 MST 11/2/82. At that time, the aircraft was…
- [NTSB DEN82DA168](https://openairdocs.org/ntsb/DEN82DA168.md): Cessna 150 · Weldona, CO · Accident · No injuries · Final report · Aug 20, 1982 · N684CF · Substantial damage
  > The plt stated to a FAA inspector that prior to takeoff the fuel gauges indicated approximately 1/4 full in each tank. The inspector indicated the fuel supply was exhausted. Numerous attempts to obtain an accident report from the plt were unsuccessful.
- [NTSB DEN82DA110](https://openairdocs.org/ntsb/DEN82DA110.md): Piper PA-32RT-300T · Durango, CO · Accident · No injuries · Final report · Jun 23, 1982 · N31912 · Substantial damage
  > The pilot reported that after taking off, dense white smoke began to fill the cockpit and seemed to come from under the instrument panel. He stated that the instruments were in the normal operating range, but the smoke became so dense that the visibility in…
- [NTSB DEN78FA011](https://openairdocs.org/ntsb/DEN78FA011.md): Cessna 175 · Leadville, CO · Accident · 2 fatal · Closed · Nov 25, 1977 · N9413B · Destroyed
- [NTSB DEN77FTE15](https://openairdocs.org/ntsb/DEN77FTE15-201377.md): Stits SA-11A · Longmont, CO · Accident · 2 fatal · Closed · Jan 13, 1977 · N3274 · Substantial damage
- [NTSB DEN75AD043](https://openairdocs.org/ntsb/DEN75AD043.md): Cessna 150H · Lamar, CO · Accident · 2 fatal · Closed · Feb 13, 1975 · N22010 · Destroyed
- [NTSB DEN75AD016](https://openairdocs.org/ntsb/DEN75AD016.md): Cessna 150L · Parker, CO · Accident · 2 fatal · Closed · Sep 29, 1974 · N11945 · Destroyed
- [NTSB DEN72FTE31](https://openairdocs.org/ntsb/DEN72FTE31.md): Piper PA-28 · Littleton, CO · Accident · No injuries · Closed · Sep 11, 1971 · N9162W · Substantial damage
- [NTSB DEN68F0091](https://openairdocs.org/ntsb/DEN68F0091.md): Mooney M20C · Broomfield, CO · Accident · No injuries · Closed · Aug 27, 1967 · N6482U · Substantial damage
- [NTSB DEN68A0005](https://openairdocs.org/ntsb/DEN68A0005.md): Piper PA-30 · Windsor, CO · Accident · 2 fatal · Closed · Jul 20, 1967 · N8389Y · Destroyed
- [NTSB UNK65X0248](https://openairdocs.org/ntsb/UNK65X0248.md): Monocoupe 90A · Watkins, CO · Accident · 2 fatal · Closed · Oct 11, 1964 · N18051 · Destroyed
- [NTSB UNK64X3363](https://openairdocs.org/ntsb/UNK64X3363.md): Cessna 140 · Sterling, CO · Accident · Closed · Aug 13, 1964 · N72394 · 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" = 'CO' 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=CO

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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.