# NTSB CHI85LA235: Beech V35B, N18382, Boscobel, WI, June 17, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 17, 1985, 12:00 local (17:00 UTC)
- Place: Boscobel, WI
- Coordinates: 43.129016, -90.699661 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.1290&lon=-90.6997&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 13095
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI85LA235
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13095/pdf
- Page: https://openairdocs.org/ntsb/CHI85LA235

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, approach - vfr pattern - final approach
  - engine assembly,camshaft - fatigue (cause)
  - maintenance - improper, manufacturer (cause)
- In flight collision with object, descent - emergency
  - object - tree(s) (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE ENGINE FAILED ON FINAL APPROACH. THE AIRCRAFT DID NOT CLEAR A WOODED AREA RESULTING IN AN UNCONTROLLED DESCENT. THE CAMSHAFT HAD FAILED AT THE NUMBER 1 JOURNAL OIL GROOVE.

## Aircraft

- Registration: [N18382](https://openairdocs.org/deregistered/N18382-2000-08-31), registration cancelled 2000-08-31, S/N D-10051 (OpenAirDocs)
- Reported make and model: BEECH V35B
- Registry model: [Beech V35B](https://openairdocs.org/model/beech-v35b) (registry code 1151548) (OpenAirDocs)
- Category: Airplane
- Serial number: D10051
- Airframe hours: 2357
- Engines: CONTINENTAL IO-520-BA 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Registered owner: Consultant Physcians In Pathol
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 30, 1984, 157 hours before
- Departed: 60C, ELROY, WI

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 2,715 total, 1,681 in this make and model, 2,500 as pilot in command, 34 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 64 °F

## 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 19850617025799A](https://openairdocs.org/incident/19850617025799A), Jun 17, 1985: Beech V35B, Boscobel, WI, Substantial damage. Trees on final blocked glide after engine quit. Struck tree and ground. Camshaft had fractured.

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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