# NTSB investigations, 1991, 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.

## Latest cases

- [NTSB CHI92FA059](https://openairdocs.org/ntsb/CHI92FA059.md): Cessna 172N · Cumberland, WI · Accident · 4 fatal · Field investigation · Final report · Dec 17, 1991 · N73920 · Destroyed
  > Failure to maintain aircraft control by the pilot in commnd. Factors in the accident are the pilot's continued flight into known adverse weather, a blocked pitot static system, lack of total expereince in type of operation, and lack of total expereince in…
- [NTSB CHI92TL#01](https://openairdocs.org/ntsb/CHI92TL%2301.md): Cessna 337 · Eau Claire, WI · Accident · Serious injuries · Class 3 · Final report · Oct 25, 1991 · N2461S · Substantial damage
- [NTSB CHI92LA015](https://openairdocs.org/ntsb/CHI92LA015.md): North American Navion D · Lake Geneva, WI · Accident · No injuries · Limited investigation · Final report · Oct 20, 1991 · N10JF · Substantial damage
  > Fatigue failure of the crankshaft. A factor in the accident was inadequate quality control by other maintenance personnel.
- [NTSB CHI92DEP01](https://openairdocs.org/ntsb/CHI92DEP01.md): Lassiter Swearingen SX300 · Eagle River, WI · Accident · No injuries · Final report · Oct 18, 1991 · N9SX · Substantial damage
  > The partial loss of engine power, for reasons undetermined which resulted in an aborted takeoff and eventual overrun and landing gear collapse.
- [NTSB CHI92LA003](https://openairdocs.org/ntsb/CHI92LA003.md): Cessna 150M · Marion, WI · Accident · No injuries · Limited investigation · Final report · Oct 8, 1991 · N704CW · Substantial damage
  > The failure of the exhaust and intake valves. Factors contributing to the accident were downhill terrain and a collapsed nosegear.
- [NTSB CHI91LA299](https://openairdocs.org/ntsb/CHI91LA299.md): Piper PA-23-250 · Boscobel, WI · Accident · No injuries · Limited investigation · Final report · Sep 20, 1991 · N915PM · Substantial damage
  > Improper remedial action by the pilot-in-command (PIC), and inadequate monitoring by the designated pilot examiner (DPE) during a simulated emergency procedure. Factors related to the accident were: the loss of power in one engine due to an undetermined…
- [NTSB CHI91DEP13](https://openairdocs.org/ntsb/CHI91DEP13.md): Merritt Robertson B1-RD · Menasha, WI · Accident · Serious injuries · Final report · Sep 7, 1991 · UNREG · Destroyed
  > Inadequate visual look out whih resulted in a wire strike and uncontrolled descent.
- [NTSB CHI91LA284](https://openairdocs.org/ntsb/CHI91LA284.md): Piper PA-22-108 · Pulaski, WI · Accident · No injuries · Limited investigation · Final report · Sep 2, 1991 · N5898Z · Substantial damage
  > The pilot's inadequate compensation for wind conditions. The gusty crosswind was a related factor.
- [NTSB CHI91LA283](https://openairdocs.org/ntsb/CHI91LA283.md): Mooney M20K · Burlington, WI · Accident · Minor injuries · Limited investigation · Final report · Aug 31, 1991 · N9514R · Substantial damage
  > The pilot's exceeding the airplane's licensed gross weight and the pilot's improper preflight planning and preparation.
- [NTSB CHI91DEP12](https://openairdocs.org/ntsb/CHI91DEP12.md): Schweizer G-164-A · Elkhorn, WI · Accident · No injuries · Final report · Aug 20, 1991 · N48635 · Substantial damage
  > The pilot in command's failure to maintain adequate altitude.
- [NTSB CHI91LA265](https://openairdocs.org/ntsb/CHI91LA265.md): Beech 77 · Mosinee, WI · Accident · Minor injuries · Limited investigation · Final report · Aug 14, 1991 · N38189 · Substantial damage
  > The pilot's poor preflight planning/preparation, and the selection of unsuitable terrain for takeoff. A related factor was the grassy runway (farm field).
- [NTSB CHI91LA258](https://openairdocs.org/ntsb/CHI91LA258.md): Cessna 210 · Delavan, WI · Accident · Minor injuries · Limited investigation · Final report · Aug 9, 1991 · N6159F · Substantial damage
  > Misjudged fuel consumption calculations by the pilot which resulted in fuel exhaustion. A factor related to the accident was refueling not performed.
- [NTSB CHI91LA246](https://openairdocs.org/ntsb/CHI91LA246.md): Beech 35A · Hager City, WI · Accident · 1 fatal · Limited investigation · Final report · Aug 4, 1991 · N7451N · Destroyed
  > The failure of the pilot to maintain airspeed above stalling speed while maneuvering.
- [NTSB CHI91LA234](https://openairdocs.org/ntsb/CHI91LA234.md): Cessna 172 · Sheboygan, WI · Accident · Minor injuries · Limited investigation · Final report · Jul 27, 1991 · N4821G · Substantial damage
  > The pilot's failure to maintain aircraft control. Factors are the pilot's lack of total expereince, his inadequate recovery from the bounced landing and the crosswind condition.
- [NTSB CHI91DEP11](https://openairdocs.org/ntsb/CHI91DEP11.md): English Pietenpol Aircamper · Brodhead, WI · Accident · Serious injuries · Final report · Jul 27, 1991 · N14961 · Substantial damage
  > Erosion of an exhaust valve.
- [NTSB CHI91LA229](https://openairdocs.org/ntsb/CHI91LA229.md): Luscombe 8A · Lake Geneva, WI · Accident · No injuries · Limited investigation · Final report · Jul 25, 1991 · N28580 · Substantial damage
  > Aircraft control was not maintained by the pilot. Factors related to the accident were a quartering tailwind.
- [NTSB CHI91IA223](https://openairdocs.org/ntsb/CHI91IA223.md): Beech B200 · Greenbay, WI · Incident · No injuries · Incident investigation · Final report · Jul 22, 1991 · N770M · Minor damage
  > Inadequate airframe design, which resulted in the in-flight separation of the left engine's outboard aft upper cowl door.
- [NTSB CHI91LA217](https://openairdocs.org/ntsb/CHI91LA217.md): Piper PA22/20 · Stevens Point, WI · Accident · No injuries · Limited investigation · Final report · Jul 13, 1991 · N5968D · Substantial damage
  > The improper installation of the flight control system rudder control rod (rudder cable bellcrank torque tube) by maintenance personnel. A factor contributing to this accident was the inoperative tailwheel steering.
- [NTSB CHI91LA215](https://openairdocs.org/ntsb/CHI91LA215.md): Cessna 182A · Menomonee Falls, WI · Accident · No injuries · Limited investigation · Final report · Jul 5, 1991 · N4735D · Substantial damage
  > The fatigue induced propeller blade failure. A related factor was the operator's delayed propeller overhaul.
- [NTSB CHI91DEP09](https://openairdocs.org/ntsb/CHI91DEP09.md): Bowers Flybaby 1A · Stoughton, WI · Accident · 1 fatal · Final report · Jun 17, 1991 · N8084D · Destroyed
  > The inadequate design by the manufacturer to provide for adequate protection from moisture accumulation in the form of drain holes. Contributing factors were the deterioration (wood rot) of the wing spar attach and the lack of inspection access.
- [NTSB CHI91DEP10](https://openairdocs.org/ntsb/CHI91DEP10.md): Allan R. Goldman Dragonfly · Kenosha, WI · Accident · No injuries · Final report · Jun 16, 1991 · N222TH · Substantial damage
  > Inadequate aircraft design and insufficient information regarding wing versus canard angle for an amateur built aircraft.
- [NTSB CHI91DEP08](https://openairdocs.org/ntsb/CHI91DEP08.md): Jack Thomas Pitts S-IT · Kenosha, WI · Accident · 1 fatal · Final report · Jun 16, 1991 · N83AM · Destroyed
  > Improper maintenance, by person or persons unknown, to the elevator control system which allowed a bolt attaching the elevator control rod to the pitch bellcrank to become disconnected during flight.
- [NTSB CHI91DEP07](https://openairdocs.org/ntsb/CHI91DEP07.md): Cessna 182M · Wissota, WI · Accident · No injuries · Final report · Jun 8, 1991 · N91691 · Substantial damage
  > The pilot in command's misjudgment of the proper touchdown point during an emergency landing and the pilot in command's failure to refuel the airplane.
- [NTSB CHI91DEP06](https://openairdocs.org/ntsb/CHI91DEP06.md): Avid Flyer Avid Flyer · Endeavor, WI · Accident · No injuries · Final report · Jun 7, 1991 · N369AF · Substantial damage
  > The pilot in command's inability to effectively eliminate carburetor ice to avoid an emergency landing.
- [NTSB CHI91LA186](https://openairdocs.org/ntsb/CHI91LA186.md): Piper PA-28R-200 · Pulaski, WI · Accident · No injuries · Limited investigation · Final report · Jun 5, 1991 · N111CP · Substantial damage
  > The pilot's failure to select a proper touchdown point. A factor in the accident was inadequate runway maintenance by airport personnel.
- [NTSB CHI91LA177](https://openairdocs.org/ntsb/CHI91LA177.md): Cessna 140 · Depere, WI · Accident · Serious injuries · Limited investigation · Final report · May 31, 1991 · N4090N · Destroyed
  > The pilot's failure to correct a mushed stall during liftoff. A factor in the accident was the pilot's failure to compensate for wind conditions.
- [NTSB CHI91DEP05](https://openairdocs.org/ntsb/CHI91DEP05.md): Piper PA-25-235 · Neenah, WI · Accident · No injuries · Final report · May 27, 1991 · N855SD · Substantial damage
  > The pilot in command's failure to attain sufficient airspeed to achieve flight, and his failure to abort the takeoff.
- [NTSB CHI91LA157](https://openairdocs.org/ntsb/CHI91LA157.md): Piper PA-34-220T · Eau Claire, WI · Accident · No injuries · Limited investigation · Final report · May 14, 1991 · N8356B · Substantial damage
  > The inadequate finishing procedures used by the manufacturer and the failure to comply with the manufacturer's bulletin.
- [NTSB CHI91LA150](https://openairdocs.org/ntsb/CHI91LA150.md): Bellanca 7GCBC · Hillsbord, WI · Accident · Minor injuries · Limited investigation · Final report · May 12, 1991 · N57386 · Substantial damage
  > Directional control was not maintained by the pilot. A factor related to the accident was a drainage ditch.
- [NTSB CHI91LA149](https://openairdocs.org/ntsb/CHI91LA149.md): Cessna 172 · Neosho, WI · Accident · No injuries · Limited investigation · Final report · May 11, 1991 · N7444A · Substantial damage
  > The pilot's failure to properly flare the airplane and an improper recovery from a bounced landing.
- [NTSB CHI91LA141](https://openairdocs.org/ntsb/CHI91LA141.md): Taylorcraft BC12-D · Evansville, WI · Accident · No injuries · Limited investigation · Final report · Apr 26, 1991 · N61978 · Substantial damage
  > The pilot's selection of unsuitable terrain for landing, not maintaining directional control and attempting a go-around without sufficient airspeed. A factor was the rutted runway surface.
- [NTSB CHI91DER03](https://openairdocs.org/ntsb/CHI91DER03.md): Varieze 001 · Superior, WI · Accident · 1 fatal · Final report · Apr 19, 1991 · N87VE · Destroyed
  > The pilot's poor planning and decision making which resulted in a loss of engine power due to fuel exhaustion.
- [NTSB CHI91DEP04](https://openairdocs.org/ntsb/CHI91DEP04.md): Brault Glasair SH2F · Green Bay, WI · Accident · Minor injuries · Final report · Apr 11, 1991 · N1490 · Substantial damage
  > The pilot in command's failure to refuel the aircraft prior to departure. A factor contributing to the accident was the unporting of the fuel pick up line in fuel tank during abrupt or negative 'g' maneuvers.
- [NTSB CHI91FA126](https://openairdocs.org/ntsb/CHI91FA126.md): Beech F.33A · Chippewa Falls, WI · Accident · 2 fatal · Field investigation · Final report · Apr 9, 1991 · N8012T · Destroyed
  > The first pilot's continued flight in known adverse weather. Factors in the accident were the first pilot's poor weather evaluation, the second pilot's complacency and the first pilot's self induced pressure to complete a checkout in model.
- [NTSB CHI91LA125](https://openairdocs.org/ntsb/CHI91LA125.md): Cessna 152 · Oskosh, WI · Accident · No injuries · Limited investigation · Final report · Apr 7, 1991 · N24399 · Substantial damage
  > Refueling not performed resulting in loss of engine power due to fuel exhaustion. Factors related to the accident were misjudged fuel consumption calculations and non suitable terrain.
- [NTSB CHI91LA102](https://openairdocs.org/ntsb/CHI91LA102.md): Aeronca 15AC · St.Croix Falls, WI · Accident · 1 fatal · Limited investigation · Final report · Mar 3, 1991 · N1340H · No damage
  > Failure to conduct a passenger safety briefing, and inadequate supervision, by the pilot in command. A factor related to the accident is the passenger's inattentiveness.
- [NTSB CHI91LA096](https://openairdocs.org/ntsb/CHI91LA096.md): Cessna 152 · Osseo, WI · Accident · No injuries · Limited investigation · Final report · Feb 10, 1991 · N49288 · Substantial damage
  > Fuel exhaustion which occurred when the pilot became lost/disoriented. Factors related to the accident were: the pilot's lack of total experience, the terrain condition, and a fence.
- [NTSB CHI91LA095](https://openairdocs.org/ntsb/CHI91LA095.md): Beech G35 · Teedsburg, WI · Accident · Serious injuries · Limited investigation · Final report · Feb 10, 1991 · N4596D · Substantial damage
  > Failure of the pilot to obtain or maintain adequate airspeed for a go-around (aborted landing), which resulted in an inadvertent stall/mush. The failure to attain proper runway alignment for landing was a related factor.
- [NTSB CHI91LA093](https://openairdocs.org/ntsb/CHI91LA093.md): Piper PA-28-181 · Marshfield, WI · Accident · No injuries · Limited investigation · Final report · Feb 7, 1991 · N6205J · Substantial damage
  > Improper in-flight planning/decision by the pilot and his failure to maintain airspeed, which resulted in an inadvertent stall/mush onto snow covered terrain beside the runway. The adverse weather conditions and snow covered terrain were related factors.
- [NTSB CHI91FA088](https://openairdocs.org/ntsb/CHI91FA088.md): Piper PA-28-140 · Osceola, WI · Accident · 7 fatal · Field investigation · Final report · Feb 3, 1991 · N4676R · 2 aircraft · Destroyed
  > Failure of the pilots in both aircraft to seeing-and-avoid the other airplane.
- [NTSB CHI91LA076](https://openairdocs.org/ntsb/CHI91LA076.md): Cessna 320 · Middleton, WI · Accident · No injuries · Limited investigation · Final report · Jan 24, 1991 · N4112T · Substantial damage
  > The main landing gear collapsed during landing rollout due to extreme cold temperatures. A factor related to the accident was a snowbank adjacent to the runway.
- [NTSB CHI91LA080](https://openairdocs.org/ntsb/CHI91LA080.md): Cessna 152 · Eau Claire, WI · Accident · No injuries · Limited investigation · Final report · Jan 20, 1991 · N94647 · Substantial damage
  > The pilot's failure to maintain directional control.
- [NTSB CHI91DEP03](https://openairdocs.org/ntsb/CHI91DEP03.md): Air Command 503 · Tomahawk, WI · Accident · 1 fatal · Final report · Jan 15, 1991 · UNREG · Destroyed
  > The pilot-in-command's abrupt movement of the flight controls which resulted in loss of rotor RPM and eventual departure from controlled flight. A factor contributing was ice accumulation on the pilot's face resulting in pilot incapacitation (visual…
- [NTSB CHI91LA072](https://openairdocs.org/ntsb/CHI91LA072.md): Piper J3C-65 · Springbrook, WI · Accident · No injuries · Limited investigation · Final report · Jan 13, 1991 · N87867 · Substantial damage
  > The pilot's attempt to takeoff with a strong gusty tailwind.
- [NTSB CHI91LA060](https://openairdocs.org/ntsb/CHI91LA060.md): Cessna 150D · Ft. Atkinson, WI · Accident · No injuries · Limited investigation · Final report · Jan 6, 1991 · N4286U · Substantial damage
  > The pilot's failure to refuel. A factor was unsuitable terrain for landing.
- [NTSB CHI91LA054](https://openairdocs.org/ntsb/CHI91LA054.md): Cessna 172P · New Holstein, WI · Accident · No injuries · Limited investigation · Final report · Jan 1, 1991 · N55409 · Substantial damage
  > The pilot's decision to continue the landing approach, landing on an ice covered runway and the inadequate compensation for the croswind.

## 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 year(c."eventDate") = 1991
  AND 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?state=WI&year=1991

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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.