# NTSB MKC86LA160: Huizenga SEA Hawk, N85CK, Clinton, IA, July 25, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 25, 1986, 17:05 local (22:05 UTC)
- Place: Clinton, IA
- Coordinates: 41.840312, -90.23011 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.8403&lon=-90.2301&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): 34222
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC86LA160
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34222/pdf
- Page: https://openairdocs.org/ntsb/MKC86LA160

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, approach - vfr pattern - downwind
  - fluid,fuel - starvation (cause)
  - fuel system,tank - inadequate (contributing factor)
  - acft/equip,inadequate design, pilot in command (cause)
- Forced landing, descent - emergency
- In flight collision with terrain/water, landing - flare/touchdown
  - terrain condition - open field (contributing factor)

## Analysis

DURING A TEST FLT OF AN EXPERIMENTAL SEA PLANE, THE PLT RPTD A LOSS OF ENG PWR DURING A TURN IN THE TRAFFIC PATTERN AT CLINTON AIRPORT. THE PLT STATED HE HAD 5 GALLONS OF FUEL ONBOARD AND HAD FLOWN ABOUT 2 TENTHS OF AN HOUR. INSPECTION OF THE FUEL SYSTEM REVEALED THAT DURING TURNS WITH LOW FUEL QUANTITY THE FUEL TANK WOULD BECOME UNPORTED AND THE ENG WOULD QUIT. NO FUEL TANK BAFFLES WERE INSTALLED IN THE TANK TO PREVENT THE FUEL FROM MOVING OUTBOARD FROM THE FUEL LINES. THE PLT STATED THAT THIS PROBLEM WOULD BE CORRECTED WITH THE INSTALLATION OF BAFFLES IN THE TANKS.

## Aircraft

- Registration: [N85CK](https://openairdocs.org/deregistered/N85CK-2013-06-14), registration cancelled 2013-06-14, S/N 015, built 1986 (OpenAirDocs)
- Reported make and model: HUIZENGA SEA HAWK
- Registry model: [American Composites SEAHAWK](https://openairdocs.org/model/american-composites-seahawk) (registry code 05613QJ) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 015
- Airframe hours: 1
- Engines: LYCOMING O-320 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Craig D.Huizenga
- Registered owner: Ameriglas Composites Inc.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, July 23, 1986, 1 hours before
- Departed: CWI, CLINTON, IA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; private; airplane ratings: single-engine land, single-engine sea; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 172 total, 1 in this make and model, 113 as pilot in command, 13 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 30° at 7 knots
- Visibility: 15 statute miles
- Lowest ceiling: 4,000 ft broken
- Temperature: 84 °F
- Altimeter: 29.00 inHg
- Observed at: CDI, 80 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 19860725041069A](https://openairdocs.org/incident/19860725041069A), Jul 25, 1986: Amtrts SEAHAWK, Clinton, IA, Substantial damage. Engine quit in turn to base leg. Aircraft struck fence during forced landing. Inadequate baffling in fuel tank.

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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