# NTSB investigations, WY: Uncontrolled descent

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 DEN05CA138](https://openairdocs.org/ntsb/DEN05CA138.md): Robinson R44 II · Jackson, WY · Accident · No injuries · Data collection · Final report · Sep 9, 2005 · N944U · Substantial damage
  > the pilot's failure to maintain aircraft control during initial takeoff climb resulting in an uncontrolled descent and impact with terrain. A contributing factor was the pilot's encounter in settling with power.
- [NTSB FTW97LA310](https://openairdocs.org/ntsb/FTW97LA310.md): Waco KNF · Wamsutter, WY · Accident · No injuries · Limited investigation · Final report · Aug 15, 1997 · NC698N · Substantial damage
  > The pilot's failure to maintain directional control during the precautionary landing. A factor was a wind gust.
- [NTSB DEN83FTC02](https://openairdocs.org/ntsb/DEN83FTC02.md): Pitts S-15 · Laramie, WY · Accident · 1 fatal · Final report · Apr 20, 1983 · N6CQ · Destroyed
  > The acft crashed during a ferry flt in VMC wx conditions. While in formation with two other acft N6CQ was observed to pull up to a near vertical climb, reverse course and disappear. Found near the maneuver location, the acft struck the ground in a nearly…
- [NTSB DEN81AA064](https://openairdocs.org/ntsb/DEN81AA064.md): Mitsubishi MU-2B · Riverton, WY · Accident · 5 fatal · Closed · Sep 6, 1981 · N3ED · Destroyed
- [NTSB DEN81FA032](https://openairdocs.org/ntsb/DEN81FA032.md): Cessna T210G · Worland, WY · Accident · 3 fatal · Closed · May 7, 1981 · N6842R · Destroyed
- [NTSB DEN79FA020](https://openairdocs.org/ntsb/DEN79FA020.md): Cessna R172K · Banner, WY · Accident · 1 fatal · Closed · Feb 6, 1979 · N758AV · Destroyed
- [NTSB DEN78FA060](https://openairdocs.org/ntsb/DEN78FA060.md): Piper PA-28 · Edgerton, WY · Accident · 2 fatal · Closed · Aug 14, 1978 · N40439 · Destroyed
- [NTSB DEN78FA040](https://openairdocs.org/ntsb/DEN78FA040.md): Beech D50C · Wheatland, WY · Accident · 4 fatal · Closed · May 4, 1978 · N320Z · Destroyed
- [NTSB DEN78FA003](https://openairdocs.org/ntsb/DEN78FA003.md): Mooney M20C · Sheridan, WY · Accident · 2 fatal · Closed · Oct 4, 1977 · N5581Q · Destroyed
- [NTSB DEN77FA041](https://openairdocs.org/ntsb/DEN77FA041.md): Piper PA-34 · Bigtrails, WY · Accident · 2 fatal · Closed · May 6, 1977 · N4948F · Destroyed
- [NTSB DEN77FA028](https://openairdocs.org/ntsb/DEN77FA028.md): Cessna 414 · Farson, WY · Accident · 1 fatal · Closed · Mar 2, 1977 · N8066Q · Destroyed
- [NTSB DEN76AD042](https://openairdocs.org/ntsb/DEN76AD042.md): Piper PA-23 · Lusk, WY · Accident · 4 fatal · Closed · Mar 20, 1976 · N3080P · Destroyed
- [NTSB DEN76AD034](https://openairdocs.org/ntsb/DEN76AD034.md): Cessna 320E · Sinclair, WY · Accident · 2 fatal · Closed · Feb 18, 1976 · N3440Q · Destroyed
- [NTSB DEN75AD053](https://openairdocs.org/ntsb/DEN75AD053.md): Piper PA-18 · Rock Springs, WY · Accident · 1 fatal · Closed · Apr 15, 1975 · N13833 · Destroyed
- [NTSB DEN73AD045](https://openairdocs.org/ntsb/DEN73AD045.md): Cessna 210 · Farson, WY · Accident · 2 fatal · Closed · Mar 31, 1973 · N9545T · Destroyed
- [NTSB DEN73AD013](https://openairdocs.org/ntsb/DEN73AD013.md): Cessna 170A · Midwest, WY · Accident · 1 fatal · Closed · Sep 25, 1972 · N1253D · Destroyed
- [NTSB DEN72AD045](https://openairdocs.org/ntsb/DEN72AD045.md): Beech C-18S · Mcfadden, WY · Accident · 7 fatal · Closed · Apr 2, 1972 · N1322M · Destroyed
- [NTSB DEN72ADO43](https://openairdocs.org/ntsb/DEN72ADO43.md): Cessna 180H · Medicine Bow, WY · Accident · 1 fatal · Closed · Mar 20, 1972 · N9050M · Destroyed
- [NTSB DEN72AD024](https://openairdocs.org/ntsb/DEN72AD024.md): Cessna 172 · Opal, WY · Accident · 3 fatal · Closed · Oct 29, 1971 · N6151E · Destroyed
- [NTSB DEN71AD028](https://openairdocs.org/ntsb/DEN71AD028.md): Cessna T310P · Cheyenne, WY · Accident · 1 fatal · Closed · Dec 18, 1970 · N5810M · Destroyed
- [NTSB DEN71AD015](https://openairdocs.org/ntsb/DEN71AD015.md): Beech B35 · Evanston, WY · Accident · 2 fatal · Closed · Oct 6, 1970 · N8817A · Destroyed
- [NTSB DEN69A0047](https://openairdocs.org/ntsb/DEN69A0047.md): Lockheed 12A · Casper, WY · Accident · Serious injuries · Closed · May 9, 1969 · N399X · Substantial damage
- [NTSB DEN68A0056](https://openairdocs.org/ntsb/DEN68A0056.md): Cessna 182 · Thermopolis, WY · Accident · 2 fatal · Closed · Jun 8, 1968 · N3195Q · Destroyed
- [NTSB DEN68A0008](https://openairdocs.org/ntsb/DEN68A0008.md): Bell 47G3B1 · Bondurant, WY · Accident · 2 fatal · Closed · Jul 27, 1967 · N8471E · Destroyed
- [NTSB DEN65A0082](https://openairdocs.org/ntsb/DEN65A0082.md): Champion 7ECA · Alcova, WY · Accident · 2 fatal · Closed · Jun 16, 1965 · N11060 · Destroyed
- [NTSB DEN65A0069](https://openairdocs.org/ntsb/DEN65A0069.md): Cessna 182A · 8s Cheyenne, WY · Accident · 1 fatal · Closed · May 3, 1965 · N9987T · Destroyed
- [NTSB UNK64X1396](https://openairdocs.org/ntsb/UNK64X1396.md): Cessna 172 · Dubois, WY · Accident · 1 fatal · Closed · Apr 20, 1964 · N5831A · Substantial damage
- [NTSB UNK64X0696](https://openairdocs.org/ntsb/UNK64X0696.md): Champion 7GCB · Split Rock, WY · Accident · 2 fatal · Closed · Feb 26, 1964 · N9909Y · Destroyed

## 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" = 'WY' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 650)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/650/cases?state=WY

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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.