# NTSB CHI87LA211: Cessna 172K, N84352, Jefferson, WI, September 12, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 12, 1987, 13:10 local (18:10 UTC)
- Place: Jefferson, WI
- Coordinates: 43.000957, -88.800971 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.0010&lon=-88.8010&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 6, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 13825
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI87LA211
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13825/pdf
- Page: https://openairdocs.org/ntsb/CHI87LA211

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, cruise - normal
  - engine assembly,valve,exhaust - failure,total (cause)
  - engine assembly,valve,exhaust - separation (cause)
  - engine assembly,piston - ruptured (cause)
- Forced landing, descent - emergency
- On ground/water collision with object, landing - roll
  - object - pole
  - object - fence

## Analysis

THE AIRCRAFT WAS EN ROUTE ON A PERSONAL CROSS COUNTRY FLIGHT WHEN IT EXPERIENCED AN ENGINE FAILURE AND WAS FORCED TO MAKE AN EMERGENCY LANDING IN AN ALFALFA FIELD. THE AIRCRAFT LANDED LONG AND COLLIDED WITH A TELEPHONE POLE AND FENCE AT THE END OF THE FIELD. THE ENGINE FAILURE WAS DUE TO AN EXHAUST VALVE WHICH SEPARATED AND ENTERED THE COMBUSTION CHAMBER, SEVERELY DAMAGING THE PISTON AND CYLINDER HEAD.

## Aircraft

- Registration: [N84352](https://openairdocs.org/aircraft/N84352), registered now, S/N 17258437, built 1969 (OpenAirDocs)
- Reported make and model: CESSNA 172K
- Registry model: [Cessna 172K](https://openairdocs.org/model/cessna-172k) (registry code 2072430) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17258437
- Airframe hours: 1942
- Engines: LYCOMING O-320 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Alan Wulff
- Registered owner: Allan P. Wulff
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 11, 1987, 2 hours before
- Departed: AEL, ALBERT LEA, MN
- Destination: C59, DELAVAN, WI
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 300 total, 300 in this make and model, 240 as pilot in command, 31 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 130° at 13 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 70 °F, dew point 50 °F
- Altimeter: 29.00 inHg
- Observed at: MSN, 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 19870912051799A](https://openairdocs.org/incident/19870912051799A), Sep 12, 1987: Cessna 172K, Jefferson, WI, Substantial damage. Engine quit. Forced landing in a field. Left wing hit a telephone pole. Ended in a ditch. An exhaust valve failed.

## Other investigations on N84352 (1)

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.

- [NTSB CEN22LA382](https://openairdocs.org/ntsb/CEN22LA382), Aug 9, 2022: Cessna 172K (N84352), Kahului, HI, substantial damage. Probable cause: The pilot’s inadequate compensation for gusting winds while maneuvering on the ground.

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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