# NTSB MKC86FA017: Silvaggio Cassutt 111M, N4AS, Plattsburg, MO, October 25, 1985

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Field investigation · Final report
- Date: October 25, 1985, 18:10 local (23:10 UTC)
- Place: Plattsburg, MO
- Coordinates: 39.560726, -94.460128 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.5607&lon=-94.4601&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 34046
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC86FA017
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34046/pdf
- Page: https://openairdocs.org/ntsb/MKC86FA017

## 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, climb
  - engine assembly,piston - failure,partial (cause)
  - engine assembly,cylinder - failure,partial (cause)
- Forced landing, descent - emergency
- In flight collision with object, landing - flare/touchdown
  - object - fence
- In flight collision with terrain/water, landing - flare/touchdown

## Analysis

THE ACFT WAS LEVEL, IN CRUISE WHEN THE PLT NOTICED HIGH ENG TEMPERATURES. HE STATED THAT HE STARTED A SHALLOW CLIMB AND HEADED FOR THE NEAREST ARPT. EN ROUTE TO NEAREST ARPT, SMOKE CAME INTO THE COCKPIT AND THE PLT HEARD A LOUD NOISE THAT WAS ACCOMPANIED BY SMOKE AND FLAMES INSIDE THE ENG COMPARTMENT. PLT SHUT OFF FUEL VALVE. THE ACFT WAS TOO HIGH AND TOO FAST AS IT APPROACHED THE ARPT. THE PLT TRIED S TURNS BUT RAN OUT OF CONTROL DURING THE SECOND S. THE ACFT TOUCHED DOWN 100 FT TO THE WEST OF THE RWY AND 40 DEGS OFF THE RWY HEADING. THE RIGHT WING HIT STEEL FENCE POSTS AND BARBED WIRE. AFTER GROUND IMPACT THE ACFT FLIPPED UP AND AROUND AND STOPPED ON THE ARPT PROPERTY. INVESTIGATION REVEALED A BROKEN PISTON, A BROKEN PISTON PIN AND A SEPARATED CYLINDER HEAD ON THE NUMBER FOUR CYLINDER.

## Aircraft

- Registration: [N4AS](https://openairdocs.org/deregistered/N4AS-1995-09-12), registration cancelled 1995-09-12, S/N AMS02 (OpenAirDocs)
- Reported make and model: SILVAGGIO CASSUTT 111M (CASSUTT 11)
- Registry model: [Silvaggio CASSUTT 111M](https://openairdocs.org/model/silvaggio-cassutt-111m) (registry code 1970823) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: AMS02
- Airframe hours: 188
- Engines: CONTINENTAL A65-8 80 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Terry D. Blakeney
- Registered owner: Terry D. Blakeney
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, September 8, 1985, 7 hours before
- Departed: 82K, CAMERON, MO
- Airport: MO28, Plattsburg, runway 36, 2,115 × 24 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: center; flight hours: 408 total, 61 in this make and model, 61 as pilot in command, 16 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 140° at 9 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 70 °F, dew point 43 °F
- Altimeter: 30.00 inHg
- Observed at: MCI, 22 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 19851025067729A](https://openairdocs.org/incident/19851025067729A), Oct 25, 1985: Amtrsx CASSUTT3M, Plattsburg, MO, Substantial damage. Engine had abnormal readings so diverted. Engine quit, struck fence during landing. Cylinder head, piston, failed.

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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