# NTSB investigations, WI

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.

Page 24 of 61 · 3,022 cases

## Cases, newest first

- [NTSB CHI90FA212](https://openairdocs.org/ntsb/CHI90FA212.md): Boeing A75N1 · Oshkosh, WI · Accident · 1 fatal · Field investigation · Final report · Aug 2, 1990 · N25400 · Destroyed
  > The pilot-in-command's failure to maintain airspeed sufficient to avoid a stall/spin at an altitude insufficient to effect a full recovery.
- [NTSB CHI90FA208](https://openairdocs.org/ntsb/CHI90FA208.md): Lockheed 12A · Oshkosh, WI · Accident · Serious injuries · Field investigation · Final report · Jul 31, 1990 · N12AT · Destroyed
  > The inadequate emergency procedure(s) by the pilot in command following a loss of engine power for undetermined reasons(s).
- [NTSB CHI90LA209](https://openairdocs.org/ntsb/CHI90LA209.md): Cessna 150 · Oshkosh, WI · Accident · No injuries · Limited investigation · Final report · Jul 30, 1990 · N11948 · Substantial damage
  > Loss of engine power for an undetermined reason.
- [NTSB CHI90LA201](https://openairdocs.org/ntsb/CHI90LA201.md): Bryant Rowland T-18 · Fisk, WI · Accident · No injuries · Limited investigation · Final report · Jul 30, 1990 · N66BR · 2 aircraft · Substantial damage
  > The pilot-in-command of the thorp T-18'S failure to maintain a sufficient visual lookout to avoid a collision with the Cessna 170A. Contributing was the limited visibility forward and to the right in the thorp T-18.
- [NTSB CHI90LA210](https://openairdocs.org/ntsb/CHI90LA210.md): Piper J-3 CUB · Clay Banks, WI · Accident · No injuries · Limited investigation · Final report · Jul 29, 1990 · N1455N · Substantial damage
  > Pilot's failure to maintain an adequate visual lookout during the descent. Contributing factors are the pilot's poor weather evaluation, and continued VFR flight into IFR conditions.
- [NTSB CHI90LA200](https://openairdocs.org/ntsb/CHI90LA200.md): Beech A36TC · Oshkosh, WI · Accident · No injuries · Limited investigation · Final report · Jul 26, 1990 · N3738U · Substantial damage
  > The pilot's failure to recognize the deteriorating airspeed and imminent stall during the landing flare, which resulted in a hard landing.
- [NTSB CHI90LA199](https://openairdocs.org/ntsb/CHI90LA199.md): Fouga FOUGA-MAGISTER · Oshkosh, WI · Accident · No injuries · Limited investigation · Final report · Jul 26, 1990 · N302FM · Substantial damage
  > The pilot-in-command's failure to maintain proper airspeed in turn from base to final.
- [NTSB CHI90FA197](https://openairdocs.org/ntsb/CHI90FA197.md): Custom Aerotech White Lightning · Oshkosh, WI · Accident · 2 fatal · Field investigation · Final report · Jul 26, 1990 · N7147W · Destroyed
  > The pilot-in-command's failure to maintain airspeed to avoid loss of control of the aircraft.
- [NTSB CHI90LA189](https://openairdocs.org/ntsb/CHI90LA189.md): Mitsubishi MU-300 · Milwaukee, WI · Accident · No injuries · Limited investigation · Final report · Jul 18, 1990 · N800TJ · Substantial damage
  > The pilot's delayed determination of traction or braking action until too little runway remained to go around or to employ alternate means of activiating the brakes. Contributing to the accident was the overservicing of the main gear struts.
- [NTSB CHI90LA187](https://openairdocs.org/ntsb/CHI90LA187.md): Piper PA-30B · Webster, WI · Accident · No injuries · Limited investigation · Final report · Jul 14, 1990 · N8095Y · Substantial damage
  > The failure of the nose gear transmission mounting bracket which resulted in nose gear collapse during the landing roll.
- [NTSB CHI90LA194](https://openairdocs.org/ntsb/CHI90LA194.md): Piper PA-28-161 · Pulaski, WI · Accident · No injuries · Limited investigation · Final report · Jul 12, 1990 · N82676 · Substantial damage
  > The pilot's failure to maintain positive control of the airplane while landing. Factors related to the accident were the pilot's lack of total flight experience, and inadequate compensation for crosswind conditions.
- [NTSB CHI90DER01](https://openairdocs.org/ntsb/CHI90DER01.md): Piper PA-28-140 · New Richmond, WI · Accident · No injuries · Final report · Jul 12, 1990 · N5330F · Substantial damage
  > The pilot's inadequate preflight inspection, which resulted in the gascolator drain being left open.
- [NTSB CHI90DEP07](https://openairdocs.org/ntsb/CHI90DEP07.md): Bell 47-G2 · Hatley, WI · Accident · No injuries · Final report · Jul 10, 1990 · N6768D · Substantial damage
  > The partial loss of power due to sticking intake valves.
- [NTSB CHI90DEP06](https://openairdocs.org/ntsb/CHI90DEP06.md): Cessna 177B · Iola, WI · Accident · 1 fatal · Final report · Jul 6, 1990 · N30666 · Destroyed
  > Failure of the pilot to maintain adequate airspeed, which resulted in a stall/spin. Factors related to the accident were: the pilot's poorly planned approach, and his failure to go around.
- [NTSB CHI90LA164](https://openairdocs.org/ntsb/CHI90LA164.md): Cessna 182P · Cornell, WI · Accident · Serious injuries · Limited investigation · Final report · Jun 30, 1990 · N41RP · Destroyed
  > The pilot's inadequate preflight resulted in a loss of engine power due to contamination in the fuel system.
- [NTSB CHI90LA157](https://openairdocs.org/ntsb/CHI90LA157.md): Beech K-35 · Oshkosh, WI · Accident · Minor injuries · Limited investigation · Final report · Jun 18, 1990 · N123AT · Substantial damage
  > Fuel mismanagement.
- [NTSB CHI90DEP05](https://openairdocs.org/ntsb/CHI90DEP05.md): Cirrus Klappmeier Cirrus VF-30 · Baraboo, WI · Accident · No injuries · Final report · Jun 14, 1990 · N888EK · Destroyed
  > Manufacturer's inadequate equipment design to prevent a fuel leak which resulted in an in-flight fire. A factor related to the accident was the lack of an unsuitable forced landing area.
- [NTSB CHI90DEP04](https://openairdocs.org/ntsb/CHI90DEP04.md): Goss KR-2 · Kenosha, WI · Accident · Serious injuries · Final report · May 27, 1990 · N777BG · Destroyed
  > Failure of the pilot to maintain control of the aircraft, while flying it with a laterally imbalanced condition. Factors related to the accident were: the pilot's lack of flying experience, and his lack of familiarity with this aircraft.
- [NTSB CHI90FA123](https://openairdocs.org/ntsb/CHI90FA123.md): Cessna 172N · New Richmond, WI · Accident · 3 fatal · Field investigation · Final report · May 6, 1990 · N76089 · Destroyed
  > Failure of the pilot to maintain sufficient airspeed to avoid a stall/spin. A factor related related to the accident was: the pilot's lack of familiarity with the make and model of aircraft.
- [NTSB CHI90FA117](https://openairdocs.org/ntsb/CHI90FA117.md): Bellanca 8KCAB · West Bend, WI · Accident · 2 fatal · Field investigation · Final report · Apr 24, 1990 · N2976R · Destroyed
  > Inflight failure of the right wing strut-to-spar attachment fitting due to fatigue initiated by improper welding techniques involving inadequate post-weld cooling control.
- [NTSB CHI90LA116](https://openairdocs.org/ntsb/CHI90LA116.md): Beech E 55 · New Richmond, WI · Accident · No injuries · Limited investigation · Final report · Apr 22, 1990 · N17577 · Substantial damage
  > Pilot's improper use of the landing gear mechanism during the landing roll, which resulted in the partial collapse of the landing gear.
- [NTSB CHI90LA115](https://openairdocs.org/ntsb/CHI90LA115.md): Beech F33A · Milwaukee, WI · Accident · Minor injuries · Limited investigation · Final report · Apr 20, 1990 · N179DD · Substantial damage
  > The utilization of improper procedures on the part of the pilot in command by attempting to execute a coupled approach outside the parameters of the autopilot.
- [NTSB CHI90LA114](https://openairdocs.org/ntsb/CHI90LA114.md): Rockwell AC-690 · Sheboygan, WI · Accident · No injuries · Limited investigation · Final report · Apr 18, 1990 · N57175 · Substantial damage
  > Failure of the pilot to complete the landing checklist and lower the landing gear. Contributing to this accident is habit pattern interference and distraction.
- [NTSB CHI90LA107](https://openairdocs.org/ntsb/CHI90LA107.md): Cessna 150G · Franklin, WI · Accident · No injuries · Limited investigation · Final report · Apr 5, 1990 · N3876J · Substantial damage
  > Inadequate compensation for wind conditions by the pilot, and his failure to maintain runway alignment during the attempted go-around (aborted landing). The wind conditions and soft terrain were related factors.
- [NTSB CHI90DEP03](https://openairdocs.org/ntsb/CHI90DEP03.md): James A Nelson ZEN AIR CH701 · Raymond, WI · Accident · No injuries · Final report · Apr 3, 1990 · N360JN · Substantial damage
  > Manufacturer's inadequate design of the fuel drain. Contributing was the pilot-in-command's disregarding the fuel supply which resulted in fuel exhaustion.
- [NTSB CHI90LA103](https://openairdocs.org/ntsb/CHI90LA103.md): Piper PA-38 · Wausau, WI · Accident · No injuries · Limited investigation · Final report · Mar 24, 1990 · N2331C · Substantial damage
  > A hard landing resulting from the pilot not taking timely remedial when a stall was encountered.
- [NTSB CHI90LA074](https://openairdocs.org/ntsb/CHI90LA074.md): MBB BK-117A-1 · Janesville, WI · Accident · No injuries · Limited investigation · Final report · Jan 30, 1990 · N117M · Substantial damage
  > The pilot-in-command failed to ensure that the engine cowling latches were properly secured prior to departing on the maintenance test flight; the cowling came loose during flight, and contacted the main rotor blades before it separated from the helicopter.
- [NTSB CHI90LA072](https://openairdocs.org/ntsb/CHI90LA072.md): Beech E18S · Oak Creek, WI · Accident · No injuries · Limited investigation · Final report · Jan 25, 1990 · N48K · Substantial damage
  > Improper planning/decision by the pilot. Factors related to the accident were: the adverse weather conditions, accumulation of structural and/or induction ice, and dark night.
- [NTSB CHI90FA066](https://openairdocs.org/ntsb/CHI90FA066.md): Cessna 402A · Mosinee, WI · Accident · Serious injuries · Field investigation · Final report · Jan 17, 1990 · N4532Q · Destroyed
  > The pilot disregarding the published decision height and not performing a missed approach.
- [NTSB CHI90FA065](https://openairdocs.org/ntsb/CHI90FA065.md): Cessna 402B · Appleton, WI · Accident · 1 fatal · Field investigation · Final report · Jan 17, 1990 · N87163 · Destroyed
  > The pilot's decision to continue flight into known adverse weather conditions resulting in a windshear encounter with insufficient altitude for recovery. The existing adverse weather conditions were factors.
- [NTSB CHI90FA056](https://openairdocs.org/ntsb/CHI90FA056.md): Cessna 340 · Merrill, WI · Accident · No injuries · Field investigation · Final report · Dec 28, 1989 · N69556 · Substantial damage
  > Failure of the pilot to maintain proper alignment with the runway during his landing roll and an inflight encounter with icing conditions.
- [NTSB CHI90FA055](https://openairdocs.org/ntsb/CHI90FA055.md): Beech A24R · Merrill, WI · Accident · 3 fatal · Field investigation · Final report · Dec 28, 1989 · N37329 · Destroyed
  > Flight into known adverse weather by the pilot, and structural/wing ice. Factors related to the accident were: the icing conditions and trees in the area of the accident.
- [NTSB CHI90LA046](https://openairdocs.org/ntsb/CHI90LA046.md): Cessna 150M · Lacrosse, WI · Accident · Minor injuries · Limited investigation · Final report · Dec 18, 1989 · N704NP · Substantial damage
  > The student pilot's improper pre-flight planning/preparation, which did not include a plan to refuel the aircraft as necessary. The student pilot's lack of total experience contributed to this accident, as did the cfi's inadequate supervision of the student.
- [NTSB CHI90LA041](https://openairdocs.org/ntsb/CHI90LA041.md): Cessna 172N II · Middleton, WI · Accident · No injuries · Limited investigation · Final report · Dec 10, 1989 · N75912 · Substantial damage
  > The pilot's improper use of flaps to provide lift on short final approach instead of applying power and the failure to maintain aircraft control.
- [NTSB CHI90LA042](https://openairdocs.org/ntsb/CHI90LA042.md): Beech V35 · Cable, WI · Accident · No injuries · Limited investigation · Final report · Dec 9, 1989 · N7988M · Substantial damage
  > The pilot's failure to adequately compensate for crosswind conditions. Contributing to the accident was the gusty, crosswind conditions which existed.
- [NTSB CHI90DEP02](https://openairdocs.org/ntsb/CHI90DEP02.md): Rotec Panther 2+ · Holmen, WI · Accident · Serious injuries · Final report · Dec 1, 1989 · UNREG · Substantial damage
  > Inadvertent partial deployment of the emergency ballistic recovery parachute resulting in a loss of engine thrust and aerodynamic control of the aircraft.
- [NTSB CHI90LA035](https://openairdocs.org/ntsb/CHI90LA035.md): Piper PA-22 · Barron, WI · Accident · No injuries · Limited investigation · Final report · Nov 30, 1989 · N8749D · Substantial damage
  > Improper use of the carburetor heat by the pilot and subsequent carburetor ice. Contributing factors were: carburetor icing conditions, slick (wet/snow covered) runway, and trees/brush near the departure end of the runway.
- [NTSB CHI90LA033](https://openairdocs.org/ntsb/CHI90LA033.md): Cessna 152 · Eau Claire, WI · Accident · No injuries · Limited investigation · Final report · Nov 26, 1989 · N5115Q · Substantial damage
  > Failure of the student pilot to maintain directional control of the aircraft, which resulted in an inadvertent ground swerve. Factors related to the accident were: the crosswind, the student's lack of total experience, his diversion of too much attention to…
- [NTSB CHI90FA028](https://openairdocs.org/ntsb/CHI90FA028.md): Beech A36 · Shell Lake, WI · Accident · 3 fatal · Field investigation · Final report · Nov 14, 1989 · N1607W · Destroyed
  > The pilot-in-command's failure to perform a missed approach, his descending below the minimum descent altitude, and his failure to maintain proper altitude to avoid impact with the terrain. Contributing to the accident was the pilot-in-command's lack of total…
- [NTSB CHI90DEP01](https://openairdocs.org/ntsb/CHI90DEP01.md): Wychen Challenger II · Warrens, WI · Accident · Serious injuries · Final report · Oct 22, 1989 · N91269 · Substantial damage
  > A broken cranskshaft which resulted in the loss of power. A factor related to the accident was: the lack of suitable terrain for a forced landing.
- [NTSB CHI90LA015](https://openairdocs.org/ntsb/CHI90LA015.md): Cessna 207 · Dodgeville, WI · Accident · No injuries · Limited investigation · Final report · Oct 19, 1989 · N1517U · Substantial damage
  > Pilot's improper planning/decision and his delay in deciding to go around. Factors related to the accident were: the unfavorable wind conditions, the pilot's visual perception on the crowned runway, his misjudgement of speed and remaining distance on the…
- [NTSB CHI90LA010](https://openairdocs.org/ntsb/CHI90LA010.md): Cessna 172M · Cedarburg, WI · Accident · No injuries · Limited investigation · Final report · Oct 14, 1989 · N1325U · Substantial damage
  > Delay of the flight instructor (CFI) in making a go-around and his failure to attain sufficient airspeed to climb after taking off again. The transmission wire (power line) and high vegetation were contributing factors.
- [NTSB CHI89LA194](https://openairdocs.org/ntsb/CHI89LA194.md): Piper PA-28-180 · Mt. Horeb, WI · Accident · No injuries · Limited investigation · Final report · Sep 28, 1989 · N44502 · Substantial damage
  > The pilot's failure to follow proper procedures for breaking-in new brakes and the excessive touchdown speed. Contributing factors were the worn brakes.
- [NTSB CHI89LA176](https://openairdocs.org/ntsb/CHI89LA176.md): Piper PA-23-160 · Eau Claire, WI · Accident · No injuries · Limited investigation · Final report · Aug 27, 1989 · N8886 · Substantial damage
  > Inadvertent retraction of the landing gear by the pilot. His habit interference and lack of experience in the type of aircraft were contributing factors.
- [NTSB CHI89DEP11](https://openairdocs.org/ntsb/CHI89DEP11.md): Tierra II Panther 2 Plus · Tomah, WI · Accident · Minor injuries · Final report · Aug 23, 1989 · N22KK · Substantial damage
  > The pilot's premature liftoff, which resulted in a stall/mush and subsequently impact on the runway.
- [NTSB CHI89FA174](https://openairdocs.org/ntsb/CHI89FA174.md): Cessna 172P · Superior, WI · Accident · Serious injuries · Field investigation · Final report · Aug 17, 1989 · N98584 · Substantial damage
  > The failure of the pilot to maintain directional control.
- [NTSB CHI89FA165](https://openairdocs.org/ntsb/CHI89FA165.md): Bell 47G-2A-1 · Wisconsin Dells, WI · Accident · Serious injuries · Field investigation · Final report · Aug 14, 1989 · N49HB · Substantial damage
  > Attempt by the pilot to exceed the hover performance capabilities of the helicopter, and operating outside the weight and balance limitations. The pilot's overconfidence in the helicopter's ability and his subsequent failure to adequately prepare and plan…
- [NTSB CHI89LA159](https://openairdocs.org/ntsb/CHI89LA159.md): Cessna 170A · Brookfield, WI · Accident · No injuries · Limited investigation · Final report · Aug 4, 1989 · N9762A · Substantial damage
  > The pilot-in-command's failure to take proper corrective action after encountering a wind gust on landing.
- [NTSB CHI89FA155](https://openairdocs.org/ntsb/CHI89FA155.md): Lancair 235 · Fond Du Lac, WI · Accident · 2 fatal · Field investigation · Final report · Aug 1, 1989 · N385L · Destroyed
  > Failure of the pilot-in-command to assure that adequate airspeed was maintained during the turn to final approach, which resulted in an inadvertent stall/spin.
- [NTSB CHI89DEP10](https://openairdocs.org/ntsb/CHI89DEP10.md): Air Tractor AT-301 · Plainfield, WI · Accident · 1 fatal · Final report · Aug 1, 1989 · N5044S · Destroyed
  > Failure of the pilot-in-command to maintain control of the aircraft while conducting aerial application maneuvers in close proximity to the terrain.

Next page: https://openairdocs.org/ntsb.md?state=WI&page=25

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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'
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?page=24&state=WI

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