# NTSB CHI82DA192: Ercoupe 415-C, N93616, Fort Atkinson, WI, May 29, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: May 29, 1982, 17:30 local (22:30 UTC)
- Place: Fort Atkinson, WI
- Coordinates: 43.000057, -88.800697 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.0001&lon=-88.8007&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 29, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 70704
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI82DA192
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/70704/pdf
- Page: https://openairdocs.org/ntsb/CHI82DA192

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - initial climb
  - propeller system/accessories,hub - disconnected (cause)
- Forced landing, landing - flare/touchdown
- In flight collision with terrain/water, landing - flare/touchdown
  - terrain condition - soft (contributing factor)
  - terrain condition - open field (contributing factor)

## Analysis

THE SAFETY BOLT ON THE PROPELLER HUB FAILED ALLOWING THE PROPELLER TO SEPARATE FROM THE AIRCRAFT. THE PILOT LANDED IN A PLOWED FIELD.

## Aircraft

- Registration: [N93616](https://openairdocs.org/aircraft/N93616), registered now, S/N 939, built 1946 (OpenAirDocs)
- Reported make and model: ERCOUPE 415-C
- Registry model: [Ercoupe 415-C](https://openairdocs.org/model/ercoupe-415-c) (registry code 0420322) (OpenAirDocs)
- Registry engine: [Continental A&C75 series](https://openairdocs.org/engine/continental-a-c75-series) (registry code 17005, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 939
- Airframe hours: 2000
- Engines: CONTINENTAL C-85 85 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: William H. Seybold
- Registered owner: William H. Seybold
- Departed: FORT ATKINSON, WI
- Destination: FORT ATKINSON, WI
- Airport: Seybold

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 60; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 2, valid medical--w/ waivers/lim; flight hours: 1,983 total, 327 in this make and model, 1,758 as pilot in command, 2 in the last 90 days, 1 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 60° at 5 knots
- Visibility: 3 statute miles
- Lowest ceiling: 1,500 ft overcast
- Temperature: 149 °F
- Altimeter: 29.00 inHg

## 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 19820529020009A](https://openairdocs.org/incident/19820529020009A), May 29, 1982: Univar 415C, Ft Atkinson, WI, Substantial damage. Propeller hub nut came off. Allowed propeller to separate from crankshaft. Crash landed off airport.

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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