# NTSB CHI89LA125: Aerofab Lake LA 4-200, N65717, Oshkosh, WI, July 2, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 2, 1989, 10:20 local (15:20 UTC)
- Place: Oshkosh, WI
- Coordinates: 44.020706, -88.619735 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.0207&lon=-88.6197&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 22, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 14375
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI89LA125
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14375/pdf
- Page: https://openairdocs.org/ntsb/CHI89LA125

## Probable cause

THE PILOT'S ENCOUNTER WITH UNSUITABLE TERRAIN (ROUGH WATER) AND HIS INABILITY TO MAINTAIN DIRECTIONAL CONTROL.

## Sequence of events

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

- Loss of control - on ground/water, takeoff - roll/run
  - directional control - not possible, pilot in command (cause)
  - terrain condition - water,rough (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - encountered, pilot in command (cause)

## Analysis

WHILE EXECUTING TOUCH AND GO WATER LANDINGS THE AIRCRAFT EXPERIENCED A LOSS OF CONTROL WHEN IT ENCOUNTERED BOAT WAKE. THE AIRCRAFT WAS SPUN AROUND AND DURING THIS MANEUVER SUSTAINED SUBSTANTIAL DAMAGE.

## Aircraft

- Registration: [N65717](https://openairdocs.org/deregistered/N65717-2003-03-25), registration cancelled 2003-03-25, S/N 619, built 1974 (OpenAirDocs)
- Reported make and model: Aerofab Inc. LAKE LA 4-200 (LAKE LA 4-)
- Registry model: [Lake LA-4-200](https://openairdocs.org/model/lake-la-4-200) (registry code 5110310) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 619
- Engines: LYCOMING IO-360-A1B 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Jameson, David D.

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 69; commercial; airplane ratings: multi-engine land, single-engine sea, single-engine land; medical: class 2, valid medical--w/ waivers/lim; flight hours: 6,500 total, 54 in this make and model, 6,500 as pilot in command, 8 in the last 90 days, 6 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 5 knots
- Visibility: 3 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point 64 °F
- Observed at: OSH, 6 nm away

## Other investigations on N65717 (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 MIA01LA031](https://openairdocs.org/ntsb/MIA01LA031), Nov 20, 2000: Lake LA-4-200 (N65717), Iuka, MS, substantial damage. Probable cause: a loss of engine power due to fuel contamination resulting in fuel starvation, a forced landing and the subsequent in-flight collision with a wire.

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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