# NTSB CHI91LA047: Cessna 175, N6626E, Boscobel, WI, December 19, 1990

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Limited investigation · Final report
- Date: December 19, 1990, 15:30 local (21:30 UTC)
- Place: Boscobel, WI
- Coordinates: 43.129676, -90.700675 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.1297&lon=-90.7007&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report April 13, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 14971
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI91LA047
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14971/pdf
- Page: https://openairdocs.org/ntsb/CHI91LA047

## Probable cause

THE PILOT'S CONTINUED VFR FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IMC) AND HIS FAILURE TO REMAIN CLEAR OF THE TREES.  FACTORS RELATED TO THE ACCIDENT WERE:  THE ADVERSE WEATHER CONDITIONS AND THE PILOT'S LACK OF INSTRUMENT EXPERIENCE.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight encounter with weather, cruise - normal
  - weather condition - low ceiling (contributing factor)
  - weather condition - fog (contributing factor)
  - weather condition - obscuration (contributing factor)
  - vfr flight into imc - continued, pilot in command (cause)
- In flight collision with object, maneuvering - turn to reverse direction
  - object - tree(s)
  - clearance - not maintained, pilot in command (cause)
  - lack of total instrument time, pilot in command (contributing factor)

## Analysis

THE NON-INST RATED PLT, WHO WAS AN A&P MECH & AN AUTHORIZED INSPECTOR, HAD JUST PURCHASED AN ACFT. ON 12/18/90, HE & ANOTHER MECH TRAVELED TO ROCKFORD, IL TO TAKE POSSESSION OF THE ACFT. THEY WORKED ON THE ACFT & THE PLT CERTIFIED AN ANNUAL INSPN. ON 12/19/90, THE PLT OBTAINED A WX BRIEFING FOR A FLT TO KINDRED, ND. THE WX PREVENTED FLT TO KINDRED, BUT THE PLT ELECTED TO FLY AS FAR AS WX WOULD PERMIT. HE TOOK OFF AT ABOUT 1415 CST. A RESIDENT NR BOSCOBEL HEARD AN ACFT FLYING LOW IN HIS VCNTY AT ABOUT 1530 TO 1600 CST. LATER, THE RESIDENT LEARNED THAT AN ACFT WAS MISSING. HE SEARCHED THE AREA & FOUND THE WRECKAGE WHERE THE ACFT HAD HIT TREES WHILE DSCNDG ON A SOUTHERLY HEADING. THE RESIDENT RECALLED THAT THE VISIBILITY WAS ABOUT 200 YDS WHEN HE HEARD THE ACFT BEFORE IT CRASHED. ABOUT 25 MI EAST AT LONE ROCK, WI, THE 1459 CST WX WAS IN PART: 700' OVC, 1-1/2 MI VIS WITH FOG. NO PREIMPACT PART FAILURE/MALFUNCTION OF THE ACFT WAS FOUND.

## Aircraft

- Registration: [N6626E](https://openairdocs.org/deregistered/N6626E-2013-04-30), registration cancelled 2013-04-30, S/N 56126, built 1959 (OpenAirDocs)
- Reported make and model: CESSNA 175
- Registry model: [Cessna 175](https://openairdocs.org/model/cessna-175) (registry code 2072502) (OpenAirDocs)
- Registry engine: [Continental GO-300 series](https://openairdocs.org/engine/continental-go-300-series) (registry code 17024, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 56126
- Engines: CONTINENTAL GO-300-A 175 horsepower reciprocating
- Damage: Destroyed
- Flight: Ferry, Part 91
- Operator: Thomas C Tunby
- Departed: 1C8, ROCKFORD, IL
- Destination: 1ND3, KINDRED, ND

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 357 total, 303 as pilot in command, 5 in the last 90 days, 1 in the last 30 days

## Weather

- Conditions: Instrument (IMC), Day
- Wind: 80° at 5 knots
- Temperature: 30 °F, dew point 28 °F
- Altimeter: 30.10 inHg
- Observed at: LNR, 25 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19901219055569A](https://openairdocs.org/incident/19901219055569A), Dec 19, 1990: Cessna 175, Boscobel, WI, Destroyed, 2 fatal. Departed in marginal weather and continued into IMC in freezing drizzle. Lost control struck trees.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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