# NTSB investigations, WI: 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 CEN24LA119](https://openairdocs.org/ntsb/CEN24LA119.md): Zenith Stol CH750 · Sextonville, WI · Accident · Serious injuries · Class 3 · Limited · Final report · Feb 23, 2024 · N750WW · Substantial damage
  > A loss of engine power for reasons that could not be determined, followed by a loss of control and subsequent impact with terrain.
- [NTSB CEN21LA367](https://openairdocs.org/ntsb/CEN21LA367.md): Pulsar Sport 150 · Osceola, WI · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 9, 2021 · N997EM · Substantial damage
  > The total loss of engine power for undermined reasons based on available information
- [NTSB CEN14LA336](https://openairdocs.org/ntsb/CEN14LA336.md): Northwing Design Apache Sport · Omro, WI · Accident · 1 fatal · Limited investigation · Final report · Jul 3, 2014 · N2725T · Substantial damage
  > The pilot’s failure to maintain adequate airspeed to compensate for a newly installed wing, which resulted in the aircraft stalling and the subsequent loss of control.
- [NTSB CHI05FA274](https://openairdocs.org/ntsb/CHI05FA274.md): Robinson R44 · Drummond, WI · Accident · 3 fatal · Field investigation · Final report · Sep 24, 2005 · N9158U · Substantial damage
  > Clearance not obtained/maintained by the pilot during an unknown phase of flight. Contributing factors were the improper use of procedures by the pilot, the inadequate surveillance of the operation by company/management, and the wire.
- [NTSB CHI00LA034](https://openairdocs.org/ntsb/CHI00LA034.md): Taylorcraft F-21 · Houlton, WI · Accident · No injuries · Limited investigation · Final report · Dec 1, 1999 · N2005J · Substantial damage
  > the mechanic failed to torque the rod cap bolt during the major engine overhaul. Factors relating to the accident included the rough field and the collapsed landing gear.
- [NTSB CHI99FA129](https://openairdocs.org/ntsb/CHI99FA129.md): Cessna 152 · Superior, WI · Accident · 2 fatal · Field investigation · Final report · Apr 14, 1999 · N4611B · Destroyed
  > the Certified Flight Instructor failed to maintain control of the airplane.
- [NTSB CHI97FA248](https://openairdocs.org/ntsb/CHI97FA248.md): Valley Adventurers Adventurer 333 · Fond Du Lac, WI · Accident · 1 fatal · Field investigation · Final report · Aug 5, 1997 · N323VA · Destroyed
  > The kit manufacturer's use of inadequate material in construction of the airplane, his inadequate application of quality controls resulting in the debonding of the horizontal stabilizer. Factors were the total loss of the horizontal stabilizer, the elevator,…
- [NTSB CHI94FA330](https://openairdocs.org/ntsb/CHI94FA330.md): Bell 47G-5A · Wisconsin Rpds, WI · Accident · 1 fatal · Field investigation · Final report · Mar 22, 1994 · N2991W · Destroyed
  > Undetermined.
- [NTSB CHI93FAMS3](https://openairdocs.org/ntsb/CHI93FAMS3.md): Lake LA-4 · Superior, WI · Accident · 2 fatal · Missing aircraft · Final report · Apr 18, 1993 · N7608L · Destroyed
  > undetermined.
- [NTSB CHI90FAMS3](https://openairdocs.org/ntsb/CHI90FAMS3.md): Cessna 172M · Kewaunee, WI · Accident · 2 fatal · Missing aircraft · Final report · Aug 14, 1990 · N9529H · Destroyed
  > Undetermined.
- [NTSB CHI86FA194](https://openairdocs.org/ntsb/CHI86FA194.md): Piper PA-24-250 · Oshkosh, WI · Accident · Serious injuries · Field investigation · Final report · Aug 2, 1986 · N5713P · Substantial damage
  > The aircraft ran out of fuel after 3+41 hours of flight. The pilot stated that he was sure the tanks were full on takeoff. Flight planning and a documented conservative fuel burn rate indicated that the aircraft should have been able to remain airborne for at…
- [NTSB CHI86LA022](https://openairdocs.org/ntsb/CHI86LA022.md): Cessna 182N · Kenosha, WI · Accident · Serious injuries · Limited investigation · Final report · Nov 2, 1985 · N92302 · Destroyed
  > According to the pilot the flight from toledo to the kenoshaarea was uneventful. During the VOR approach to rwy 14 (approx 2 miles from the end of the runway) the aircraft impacted the ground and was destroyed. The pilot stated that the last thing he rembered…
- [NTSB CHI84FAMS1](https://openairdocs.org/ntsb/CHI84FAMS1.md): Mooney M20C · Near Green Bay, WI · Accident · 1 fatal · Missing aircraft · Final report · Nov 22, 1983 · N9232M · Destroyed
  > After a taking off at 2029 CST, the plt climbed to 7000 ft & flew on a southerly heading toward the oshkosh VOR. At 2030, the plt indicated that he had a radio problem, but he remained in radio contact with ATC until a freq change at 2039, then no further…
- [NTSB CHI83FA049](https://openairdocs.org/ntsb/CHI83FA049.md): Aeronca 11CC · Spencer, WI · Accident · 2 fatal · Field investigation · Final report · Nov 27, 1982 · N4110E · Destroyed
  > The acft was observed in a steep left turn at low altitude then impacting the ground straight down. Both propeller blades were bent back with no evidence of twisting. Approximately 1/2 inch of ice was found in the fuel line gascolator.
- [NTSB CHI82FA342](https://openairdocs.org/ntsb/CHI82FA342.md): Beech H35 · Beaver Dam, WI · Accident · 1 fatal · Field investigation · Final report · Sep 16, 1982 · N4676D · Destroyed
  > At about 1530 CDT, the aircraft departed madison, WI on a flight to the dodge county airport at juneau, WI. According to a fixed base operator at juneau, the pilot had made arrangements to fly the aircraft there on that date for an annual inspection. At 1544,…
- [NTSB CHI70A0027](https://openairdocs.org/ntsb/CHI70A0027.md): Lear Jet 23A · Racine, WI · Accident · 7 fatal · Closed · Nov 6, 1969 · N1021B · Destroyed
- [NTSB CHI70F0097](https://openairdocs.org/ntsb/CHI70F0097.md): Piper PA-18 · Berlin, WI · Accident · 1 fatal · Closed · Jun 21, 1969 · N4308Z · Destroyed
- [NTSB CHI67A0086](https://openairdocs.org/ntsb/CHI67A0086.md): Globe GC-1B · Sheboygan, WI · Accident · 1 fatal · Closed · Jan 11, 1967 · N3738K · Destroyed
- [NTSB UNK64X3060](https://openairdocs.org/ntsb/UNK64X3060.md): Taylorcraft BC12-D · Tomahawk, WI · Accident · 2 fatal · Closed · Jul 26, 1964 · N95159 · 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" = 'WI' 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=WI

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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.