# NTSB CHI91LA265: Beech 77, N38189, Mosinee, WI, August 14, 1991

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: August 14, 1991, 17:30 local (22:30 UTC)
- Place: Mosinee, WI
- Coordinates: 44.77993, -89.679725 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.7799&lon=-89.6797&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report December 4, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 15159
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI91LA265
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15159/pdf
- Page: https://openairdocs.org/ntsb/CHI91LA265

## Probable cause

THE PILOT'S POOR PREFLIGHT PLANNING/PREPARATION, AND THE SELECTION OF UNSUITABLE TERRAIN FOR TAKEOFF.  A RELATED FACTOR WAS THE GRASSY RUNWAY (FARM FIELD).

## Sequence of events

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

- In flight collision with object, takeoff - initial climb
  - terrain condition - grass (contributing factor)
  - proper climb rate - not attained, pilot in command (cause)
  - object - building(nonresidential)
  - object - vehicle
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE PILOT SAID THAT WHILE ATTEMPTING TO FLY THE AIRCRAFT OUT OF A TALL GRASS COVERED, ONE QUARTER MILE LONG STRIP, THE AIRCRAFT FAILED TO ATTAIN POSITIVE CLIMB.  HE COLLIDED WITH AN ADJACENT GRAIN ELEVATOR AUGER, THEN A PARKED CAR.

## Aircraft

- Registration: [N38189](https://openairdocs.org/deregistered/N38189-1991-10-15), registration cancelled 1991-10-15, S/N WA226 (OpenAirDocs)
- Reported make and model: BEECH 77
- Registry model: [Beech 77](https://openairdocs.org/model/beech-77) (registry code 1153007) (OpenAirDocs)
- Category: Airplane
- Serial number: WA-226
- Engines: LYCOMING O-235-L2C 115 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Peter F. Strand
- Destination: MOE, MOSINEE, WI

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 412 total, 200 in this make and model, 40 in the last 90 days, 15 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 310° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F
- Observed at: CWA, 10 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 19910814034389A](https://openairdocs.org/incident/19910814034389A), Aug 14, 1991: Beech 77, Mosinee, WI, Substantial damage. Tried to depart tall grass farm field. Unable to climb after liftoff,struck a grain elevator auger.

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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