# NTSB investigations, WI: Airframe/component/system failure/malfunction

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 1 of 2 · 77 cases

## Latest cases

- [NTSB CHI07LA204](https://openairdocs.org/ntsb/CHI07LA204.md): Cessna 182K · Edgerton, WI · Accident · Minor injuries · Limited investigation · Final report · Jul 9, 2007 · N2579R · Substantial damage
  > The reported non-mechanical loss of engine power for undetermined reasons during cruise and the excessive airspeed the pilot maintained during the approach for the forced landing. Factors were the loss of electrical power during cruise and the high vegetation…
- [NTSB CHI07MA160](https://openairdocs.org/ntsb/CHI07MA160.md): Cessna 550 · Milwaukee, WI · Accident · 6 fatal · Class 1 · Major · Final report · Jun 4, 2007 · N550BP · Destroyed
  > The National Transportation Safety Board determines that the probable cause of this accident was the pilots’ mismanagement of an abnormal flight control situation through improper actions, including failing to control airspeed and to prioritize control of the…
- [NTSB CHI05CA240](https://openairdocs.org/ntsb/CHI05CA240.md): Piper PA-12 · Boscobel, WI · Accident · No injuries · Data collection · Final report · Aug 20, 2005 · N425AH · Substantial damage
  > The separation of the right main landing gear attachment bracket bolt during the landing and the pilot's aircraft control not possible with the collapsed gear.
- [NTSB CHI05FA077](https://openairdocs.org/ntsb/CHI05FA077.md): Bombardier CL-600-2B19 · Milwaukee, WI · Accident · No injuries · Field investigation · Final report · Mar 12, 2005 · N8932C · Substantial damage
  > the captain's failure to adequately compensate for the crosswind conditions, and his failure to maintain directional control during landing. Contributing factors include the captain's failure to land at the nearest suitable airport after an in-flight…
- [NTSB CHI05LA067](https://openairdocs.org/ntsb/CHI05LA067.md): Cessna 152 · Sturtevant, WI · Accident · No injuries · Limited investigation · Final report · Feb 3, 2005 · N68714 · Substantial damage
  > The pilot's failure to identify the electrical system failure and to maintain adequate airspeed during the landing approach. Factors associated with the accident were the electrical system failure, the snow covered terrain, and the pilot's lack of experience.
- [NTSB CHI03LA222](https://openairdocs.org/ntsb/CHI03LA222.md): Cessna 195 · Racine, WI · Accident · No injuries · Limited investigation · Final report · Jul 19, 2003 · N355ST · Substantial damage
  > The failure of the left main landing gear axle resulting in the brake being locked and subsequent loss of directional control.
- [NTSB CHI03IA153](https://openairdocs.org/ntsb/CHI03IA153.md): Beech 1900D · Milwaukee, WI · Incident · No injuries · Incident investigation · Final report · Jun 7, 2003 · N901SK · Minor damage
  > Failure of the aileron sprocket assembly at the sprocket-to-shaft braze joint. Contributing factors were the improper braze procedure used by the part manufacturer at the time of fabrication which resulted in an inferior quality joint and the inadequate…
- [NTSB CHI02LA255](https://openairdocs.org/ntsb/CHI02LA255.md): Cessna 172P · Buffalo City, WI · Accident · No injuries · Limited investigation · Final report · Aug 19, 2002 · N381J · Substantial damage
  > The malfunction of the seat positioning system for undetermined reasons, which resulted in the loss of directional control. A factor to the accident was the descending embankment.
- [NTSB CHI02IA116](https://openairdocs.org/ntsb/CHI02IA116.md): Beech 200 · Hillsdale, WI · Incident · No injuries · Incident investigation · Final report · Apr 22, 2002 · N26SJ · Minor damage
  > The fatigue failure of the passenger/crew door latch pin during cruise flight.
- [NTSB CHI02IA083](https://openairdocs.org/ntsb/CHI02IA083.md): Canadair CL-600-2B19 · Appleton, WI · Incident · No injuries · Incident investigation · Final report · Feb 27, 2002 · N991CA · Minor damage
  > The separation of the low pressure turbine module due to coke resulting in the blockage of the oil system.
- [NTSB CHI02LA013](https://openairdocs.org/ntsb/CHI02LA013.md): Meester HP-14 · Sturtevant, WI · Accident · Serious injuries · Limited investigation · Final report · Oct 27, 2001 · N8833 · Substantial damage
  > The restricted movement of the aileron control system for undetermined reasons.
- [NTSB CHI01FA180](https://openairdocs.org/ntsb/CHI01FA180.md): Potez-Air Fouga CM 170 · La Crosse, WI · Accident · 2 fatal · Field investigation · Final report · Jun 16, 2001 · N301FM · Destroyed
  > The fatigue failure of the aircraft's left wing tip fuel tank rear attachment, while the aircraft was being maneuvered in a low approach, leading to the tank's in-flight separation and subsequent in-flight break up of the airplane and the aircraft's control…
- [NTSB CHI01IA124](https://openairdocs.org/ntsb/CHI01IA124.md): Boeing 717-231 · Milwaukee, WI · Incident · No injuries · Incident investigation · Final report · Feb 19, 2001 · N2410W · No damage
  > The failure of the operator to provide complete and comprehensive thrust reverser lock-out maintenance procedures and guidance to the contract maintenance personnel resulting in a partial and inadequate securing of the faulty thrust reverser and a subsequent…
- [NTSB CHI00LA277](https://openairdocs.org/ntsb/CHI00LA277.md): Bell 47G-2 · Spring Brook, WI · Accident · No injuries · Limited investigation · Final report · Aug 31, 2000 · N67083 · Substantial damage
  > A fatigue failure of the tail rotor drive gear shaft.
- [NTSB CHI00LA189](https://openairdocs.org/ntsb/CHI00LA189.md): Staudacher S-300D2 · Kenosha, WI · Accident · No injuries · Limited investigation · Final report · Jul 7, 2000 · N112KG · Substantial damage
  > The fatigue failure of the rod end bearing and the separation of the aileron. A factor was the inadequate design change by the aircraft designer.
- [NTSB CHI00IA087](https://openairdocs.org/ntsb/CHI00IA087.md): McDonnell Douglas DC9-32 · Milwaukee, WI · Incident · No injuries · Incident investigation · Final report · Jan 31, 2000 · N203ME · Minor damage
  > the chafing of the internal water heater wire. A factor was the missing ground strap.
- [NTSB CHI00FA050](https://openairdocs.org/ntsb/CHI00FA050.md): Israel Aircraft Industries 1124A · Milwaukee, WI · Accident · No injuries · Field investigation · Final report · Dec 26, 1999 · N422BC · Substantial damage
  > The failure of the first stage pressure reducer in the oxygen regulator assembly.
- [NTSB CHI99LA099](https://openairdocs.org/ntsb/CHI99LA099.md): Calkins Kitfox 5 · Waunakee, WI · Accident · No injuries · Limited investigation · Final report · Mar 1, 1999 · N394GL · Destroyed
  > the fracture of the trim actuator.
- [NTSB CHI99LA016](https://openairdocs.org/ntsb/CHI99LA016.md): Cessna 310I · Janesville, WI · Accident · Minor injuries · Limited investigation · Final report · Nov 2, 1998 · N8069M · Substantial damage
  > The pilot's inadequate preflight inspection in which he failed to remove the tow bar from the nose gear. Also causal was his misjudgment of distance and altitude from the runway which resulted in both his premature shutdown of the engines and an undershoot of…
- [NTSB CHI98LA213](https://openairdocs.org/ntsb/CHI98LA213.md): Cessna 310N · Janesville, WI · Accident · No injuries · Limited investigation · Final report · Jun 20, 1998 · N5030Q · Substantial damage
  > other maintenance personnel not installing nose landing gear door linkage. Factors were the unsecured landing gear door, the nose landing gear becoming jammed and the gear extension not possible by the pilot.
- [NTSB CHI98IA136](https://openairdocs.org/ntsb/CHI98IA136.md): Robinson R22 Beta · Franklin, WI · Incident · No injuries · Incident investigation · Final report · Apr 27, 1998 · N8331F · Minor damage
  > The mechanic's failure to follow the manufacturer's maintenance rebuilding instructions.
- [NTSB CHI98LA032](https://openairdocs.org/ntsb/CHI98LA032.md): Cessna 421A · Tomahawk, WI · Accident · No injuries · Limited investigation · Final report · Nov 7, 1997 · N2957Q · Substantial damage
  > the elevator trim tab bolt backed out, allowing the trim tab to flutter, and destroy the elevator. The factors involved were improper annual inspection by the maintenance personnel, and the inadequate aircraft preflight done by the pilot.
- [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 CHI97LA239](https://openairdocs.org/ntsb/CHI97LA239.md): Briegleb BG-12A · Superior, WI · Accident · 1 fatal · Limited investigation · Final report · Aug 2, 1997 · N5516V · Destroyed
  > the separation of the wing from the glider for undetermined reasons.
- [NTSB CHI96IA320](https://openairdocs.org/ntsb/CHI96IA320.md): Cessna 525 · Milwaukee, WI · Incident · No injuries · Incident investigation · Final report · Aug 29, 1996 · N123JN · Minor damage
  > an uncontained failure of a high pressure turbine disk blade retention post due to fatigue. A factor relating to the incident was: inadequate design of the high pressure turbine disk. Fretting on the leading side of the lobe near the fracture origin may have…
- [NTSB CHI96LA252](https://openairdocs.org/ntsb/CHI96LA252.md): Boeing A75N1 · East Troy, WI · Accident · No injuries · Limited investigation · Final report · Jul 21, 1996 · N58712 · Substantial damage
  > corrosion and fracture of the rudder control horn.
- [NTSB CHI96LA127](https://openairdocs.org/ntsb/CHI96LA127.md): Socata TBM-700 · Eau Claire, WI · Accident · No injuries · Limited investigation · Final report · Mar 29, 1996 · N292RG · Substantial damage
  > fatigue fracture and subsequent failure of the gear door hinge bracket.
- [NTSB CHI95LA288](https://openairdocs.org/ntsb/CHI95LA288.md): de Havilland DHC-1 · Hammond, WI · Accident · Serious injuries · Limited investigation · Final report · Aug 19, 1995 · N320WM · Destroyed
  > an overload failure of the right horizontal support tube assembly which the pilot/owner had modified to be adjustable. A factor in the accident was the corn.
- [NTSB CHI95IA079](https://openairdocs.org/ntsb/CHI95IA079.md): British Aerospace BAE-146-300 · Madison, WI · Incident · No injuries · Incident investigation · Final report · Jan 27, 1995 · N611AW · No damage
  > A fuel leak in the no. 2 engine left fuel manifold segment due to a design defect which led to a fatigue crack.
- [NTSB CHI94FA001](https://openairdocs.org/ntsb/CHI94FA001.md): Beech G35 · Webster, WI · Accident · 1 fatal · Field investigation · Final report · Oct 2, 1993 · N4421D · Destroyed
  > In-flight breakup of the airplane for an undetermined reason.
- [NTSB CHI92FA223](https://openairdocs.org/ntsb/CHI92FA223.md): Edra/Mcdermitt Seabird/Petrel · Oshkosh, WI · Accident · 2 fatal · Field investigation · Final report · Aug 3, 1992 · N109SB · Destroyed
  > Inadequate quality control during the manufacturing process resulting in the in-flight structural failure of the tailboom.
- [NTSB CHI92LA213](https://openairdocs.org/ntsb/CHI92LA213.md): Beech H35 · Baraboo, WI · Accident · No injuries · Limited investigation · Final report · Jul 28, 1992 · N7957D · Substantial damage
  > Inadequate maintenance service and aircraft preflight by the pilot. A factor contributing to this accident was a partial failure of the brake system.
- [NTSB CHI92LA137](https://openairdocs.org/ntsb/CHI92LA137.md): Bell 47-G2A · Dousman, WI · Accident · Serious injuries · Limited investigation · Final report · Apr 30, 1992 · N52HB · Substantial damage
  > The in-flight loss of the swash plate drive link bolt which allowed the swash plate drive assembly to disconnect.
- [NTSB CHI92FA066](https://openairdocs.org/ntsb/CHI92FA066.md): Piper PA-31P · Mosinee, WI · Accident · 1 fatal · Field investigation · Final report · Jan 2, 1992 · N500BH · Destroyed
  > An inflight fire with the cabin heater as the origin, and unsuitable terrain in which to make a forced landing. A factor related to the accident was the soft terrain.
- [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 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 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 CHI91LA017](https://openairdocs.org/ntsb/CHI91LA017.md): Cessna 172 · Portage, WI · Accident · Minor injuries · Limited investigation · Final report · Oct 27, 1990 · N738AP · Substantial damage
  > The PIC became lost and disorientated and performed a premature precautionary landing.
- [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 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 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 CHI89DEP07](https://openairdocs.org/ntsb/CHI89DEP07.md): Hiller UH-12E · Blackriverfalls, WI · Accident · Minor injuries · Final report · Jul 20, 1989 · N48313 · Destroyed
  > Pilot-in-command's failure to jettison the external load followed by his misjudgement of distance to avoid collision with the external load.
- [NTSB CHI89DEP04](https://openairdocs.org/ntsb/CHI89DEP04.md): Hiller UH-12E · Waterford, WI · Accident · No injuries · Final report · May 22, 1989 · N3829 · Substantial damage
  > The pilot's inability to maintain control during an autorotational landing attempt following the failure of the main rotor drive train torsional coupling.
- [NTSB CHI89FA071](https://openairdocs.org/ntsb/CHI89FA071.md): Sikorsky S-58T · Milwaukee, WI · Accident · Serious injuries · Field investigation · Final report · Apr 11, 1989 · N4247U · Substantial damage
  > Disconnect of the tailrotor drive shaft coupling.
- [NTSB CHI89DEP01](https://openairdocs.org/ntsb/CHI89DEP01.md): Cessna T337G · Green Bay, WI · Accident · 1 fatal · Final report · Jan 26, 1989 · N6CF · Destroyed
  > The pilot's loss of aircraft control, due to the loss of cockpit/instrument panel lighting for an undetermined reason, the inoperative penlight, and subsequent spatial disorientation of the pilot. Factors related to the accident were: darkness and the adverse…
- [NTSB CHI89IA023](https://openairdocs.org/ntsb/CHI89IA023.md): British Aerospace JS-3101 · Milwaukee, WI · Incident · No injuries · Incident investigation · Final report · Nov 10, 1988 · N333PX · Minor damage
  > Loss of lubrication to the outer wheel bearing, and the subsequent disintegration of the bearing. Contributing to the incident was the failure by maintenance personnel to properly inspect and grease the bearing.
- [NTSB CHI88FA248](https://openairdocs.org/ntsb/CHI88FA248.md): Cessna 210L · Monroe, WI · Accident · 2 fatal · Field investigation · Final report · Sep 30, 1988 · N5268V · Destroyed

Next page: https://openairdocs.org/ntsb.md?state=WI&occurrence=130&page=2

## 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'
  AND c."mKey" IN (SELECT o.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o."occurrenceNumber" = 1 AND o."occurrenceCode" = 130)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?occurrence=130&state=WI

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