# NTSB BFO90LA040: Lake LA-4-200, N1086L, Have De Grace, MD, April 28, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 28, 1990, 10:00 local (14:00 UTC)
- Place: Have De Grace, MD
- Coordinates: 39.539577, -76.09085 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.5396&lon=-76.0909&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report September 21, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 11589
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=BFO90LA040
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/11589/pdf
- Page: https://openairdocs.org/ntsb/BFO90LA040

## Probable cause

THE PILOT FAILED TO MAINTAIN DIRECTIONAL CONTROL, AND USED EXCESSIVE BRAKING TRYING TO REGAIN CONTROL.

## Sequence of events

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

- On ground/water encounter with terrain/water, takeoff - aborted
  - terrain condition - water,rough
  - aborted takeoff - delayed, pilot in command (cause)

## Analysis

AFTER LEAVING THE DOCK, THE PILOT STATED THAT HE CHECKED FOR BOAT TRAFFIC IN THE AREA THAT HE WAS GOING TO USE FOR TAKEOFF. HE NOTED THAT MOST OF THE BOATS WERE IN THE 20 FOOT RANGE AND WERE TAVELING IN A NORTH/SOUTH DIRECTION. ABOUT 3 SECONDS INTO HIS TAKEOFF HE OBSERVED A WAKE OF WATER TRAVELING EAST/WEST AND ELECTED TO ABORT THE TAKEOFF. THE AIRCRAFT COLLIDED WITH THE WAKE ABOUT THE TIME IT COMBINED WITH ANOTHER WAKE TRAVELING NORTH/SOUTH WHICH RESULTED IN SUBSTANTIALLY DAMAGING THE A/C.

## Aircraft

- Registration: [N1086L](https://openairdocs.org/deregistered/N1086L-1993-06-03), registration cancelled 1993-06-03, S/N 679 (OpenAirDocs)
- Reported make and model: LAKE LA-4-200
- Registry model: [Consolidated Aeronautics LAKE LA-4](https://openairdocs.org/model/consolidated-aeronautics-lake-la-4) (registry code 2400102) (OpenAirDocs)
- Category: Airplane
- Serial number: 679
- Airframe hours: 1116
- Engines: LYCOMING IO-360-A1B 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 91
- Operator: Seawind Airways, Inc.
- Registered owner: Seawind Airways, Inc
- Airworthiness certificate: Standard, Utility
- Last inspection: Annual, August 7, 1989
- Airport: Havre De Grace Sea Plane, runway 18, 8,000 × 500 ft, water

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 64; commercial; airplane ratings: single-engine sea; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 1,055 total, 393 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 4 knots
- Visibility: 4 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 64 °F
- Altimeter: 29.00 inHg
- Observed at: BWI, 41 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 19900428012119A](https://openairdocs.org/incident/19900428012119A), Apr 28, 1990: Conaer LA4200, Havre De Grace, MD, Substantial damage. On water takeoff saw boat wake too late. Impact caused sustantial damage as aircraft nosed in.

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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