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Accidents · NTSB CHI83FA258 · Preliminary: the investigation is not finished

Cessna T210L accident near Porter Township, Wisconsin, June 15, 1983

On June 15, 1983 at about 9:26 pm local time, a Cessna T210L, registered N732CD, was destroyed in an accident near Porter Township, Wisconsin. It was a personal flight under general aviation rules (Part 91). 2 people were killed. The weather was visual conditions (good weather).

The NTSB's probable cause their words, unchanged

The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.

Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.

What the record shows

Date
June 15, 1983 · about 9:26 pm local time
Place
Porter Township, Wisconsin · map
Type
Accident
Injuries
2 people were killed.
Weather
visual conditions (good weather)
Aircraft
Cessna T210L · all T210Ls on the register
Registration
N732CD · registry record
Damage
Destroyed
Flight
Personal flight · general aviation rules (Part 91)

The NTSB's narrative final · quoted from the NTSB record

BOTH OCCUPANTS WERE RATED PLTS. THE PLT IN THE RIGHT FRONT SEAT OF THE ACFT HAD APPLIED FOR MEMBERSHIP WITH THE ORGANIZATION THAT OWNED THE PLANE. HE MAY HAVE BEEN RECEIVING INFORMAL INSTRUCTION IN THE OPERATION OF THE ACFT. DURING FLT, THE ACFT WAS OBSERVED IN MANEUVERS WHICH WERE DESCRIBED AS STALLS. AN AIRLINE PLT WHO OBSERVED THE STALLS DESCRIBED THEM AS VIOLENT. AS THE ACFT'S NOSE CAME THRU THE HORIZON, IT REPORTEDLY DROPPED MORE THAN 45 DEG & THE ACFT ENTERED A RAPID LEFT BANK. ANOTHER WITNESS WHO SAW THE ACCIDENT, SAID THE ACFT WENT INTO A 3 TURN SPIN. WHEN THE PLT WAS RECOVERING, THE WITNESS HEARD A 'POP' & SAW SOMETHING TRAIL FROM THE ACFT. ALSO, HE HEARD THE ENG ACCELERATE DURING THE OCCURRENCE. AFTER THE ACFT CRASHED, AN EXAM OF THE CRASH AREA REVEALED THE ACFT BROKE UP IN FLT. MAJOR COMPONENTS THAT SEPARATED INCLUDED A 6 FT OUTBOARD SECTION OF THE LEFT WING, RIGHT AILERON & THE RIGHT DOOR. ALL SEPARATED METAL STRUCTURE DISPLAYED BENDING, TEARING & OVERLOAD FAILURE INDICATIONS.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.

The factual record from the NTSB's investigation tables, in plain English

Pilot

  • Certificate: private
  • Ratings: multi-engine land; single-engine land; single-engine sea; instrument: airplane
  • Flight time: 1,430 hours in all; 112 in this make and model; 90 in the last 90 days
  • Medical certificate: Unknown
  • Seat: unk

The aircraft

  • Last inspection: inspection type not recorded; 0 hours since
  • Maximum gross weight: 3,800 lb
  • Seats: 4
  • Landing gear: retractable
  • Engine: Continental TSIO-520 (piston); 0 hours total

The flight

  • Departed from: JVL Janesville WI
  • Destination: MSN Madison WI
  • Flight plan: none
  • Runway 0
  • A second pilot was aboard

Weather at the time

  • Light: daylight
  • Wind: from 180° at 18 knots
  • Visibility: 15 statute miles
  • Sky: broken clouds at 15,000 ft; scat at 3,500 ft
  • Temperature: 0°F (-18°C), dew point 0°F (-18°C)
  • Altimeter: 29.00 inHg
  • Observation at 4:00 pm from JVL

Injuries

FatalSeriousMinorNone
Crew2

Documents from the investigation the NTSB's docket: the evidence folder behind the report

The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.

Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.