OpenAirDocs.org

NTSB investigations, MN

13 cases where the phase of flight was Unknown.

Cases per year

19642026

Where

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Latest cases

Query with SQL
duckdb -csv -c "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\" = 'MN' 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"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

NTSB CEN25FA367Accident · 2 fatalClass 3 · FieldPreliminary reportRobinson Helicopter R66 · Lakeville, MNOn September 6, 2025, about 1442 central daylight time, a Robinson Helicopter Company R66 helicopter, N6633L was destroyed when it was involved in an accident near Lakeville, Minnesota. The pilot and passenger were fatally injured. The helicopter was operated…Sep 6, 2025 · N6633L · DestroyedNTSB CEN23LA376Accident · 1 fatalClass 4 · LimitedFinal reportSixchuter Spirit XL · Hovland, MNThe collision with the lake by a noncertificated pilot for reasons that could not be determined.Aug 18, 2023 · N538DR · DestroyedNTSB CEN20LA392Accident · 3 fatalClass 3 · LimitedFinal reportCessna 172 · Cottage Grove, MNA steep descent and impact with terrain for reasons that could not be determined based on the available information.Sep 13, 2020 · N8488L · DestroyedNTSB CEN18FA083Accident · 1 fatalField investigationFinal reportSkwira Matthew J W-10 Tailwind · Sauk Centre, MNImpact with terrain for reasons that could not be determined based on the available information.Jan 23, 2018 · N251WT · Substantial damageNTSB CEN12FAMS1Accident · 1 fatalMissing aircraftFinal reportPiper PA-31-325 · Duluth, MNUndetermined because the airplane was not found.Jun 8, 2012 · N174BH · Substantial damageNTSB CHI03LA269Accident · 2 fatalLimited investigationFinal reportHolden Pulsar · Willmar, MNThe pilot's failure to maintain adequate airspeed resulting in an inadvertent stall/spin.Aug 16, 2003 · N78DT · DestroyedNTSB CHI91FA116Accident · 1 fatalField investigationFinal reportMooney M-20C · Prior Lake, MNFailure to maintain airspeed while executing a forced landing. Factors related to the accident were the pilot's improper inflight planning/decision, and fuel exhaustion.Mar 26, 1991 · N9692M · DestroyedNTSB CHI90FA185Accident · 3 fatalField investigationFinal reportPiper PA-28-140 · Grand Marais, MNPoor judgement of the pilot due to his impairment from consumption of alcohol, and his failure to maintain control of the aircraft. A factor related to the accident was: pilot fatigue due to lack of sleep.Jul 14, 1990 · N6146W · DestroyedNTSB CHI88FA153Accident · 2 fatalField investigationFinal reportPiper PA-38-112 · Hamm Lake, MNLoss of control in flight, either by the student or by the instructor, at an altitude insufficient to allow for a recovery, by the flight instructor, before the resulting out of control descent caused the accident airplane to strike the terrain.Jul 3, 1988 · N2485N · DestroyedNTSB CHI87FA083Accident · 4 fatalField investigationFinal reportCessna 172N · Fergus Falls, MNFollowing a 1.5 hour personal flight at night, the aircraft crashed into the side of a low hill near the destination airport. Although the pilot had a total of 6 hours of night time, most of his solo night time was during this last flight. Hazy VFR conditions…Feb 12, 1987 · N734MV · DestroyedNTSB MKC78FA066Accident · 2 fatalClosedCessna 172N · Blaine, MNAug 20, 1978 · N733SD · DestroyedNTSB MKC67A0067Accident · 2 fatalClosedHughes 269B · Federal Dam, MNMay 12, 1967 · N700 · DestroyedNTSB UNK64X0416Accident · 2 fatalClosedTaylorcraft BC12D · Henning Minn, MNFeb 1, 1964 · N96885 · Destroyed