# NTSB ANC87LA098: Lake LA-4, N1135L, Cool Lake, AK, July 16, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 15, 1987, 22:30 local (Jul 16, 1987, 06:30 UTC)
- Place: Cool Lake, AK
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 9, 1988
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4872
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC87LA098
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4872/pdf
- Page: https://openairdocs.org/ntsb/ANC87LA098

## 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
  - aircraft handling - not maintained, pilot in command (cause)
  - airspeed(v2) - not maintained, pilot in command (cause)
  - directional control - not maintained, pilot in command (cause)
- On ground/water collision with object, takeoff - roll/run
  - object - tree(s)

## Analysis

THE PILOT STATED THAT DURING THE TAKEOFF ON THE LAKE THE AIRCRAFT WOULD NOT LIFT OFF THE WATER AND HE LOST DIRECTIONAL CONTROL OF THE AIRCRAFT CAUSING IT TO COLLIDE WITH THE LAKE SHORE.

## Aircraft

- Registration: [N1135L](https://openairdocs.org/deregistered/N1135L-1991-08-21), registration cancelled 1991-08-21, S/N 297 (OpenAirDocs)
- Reported make and model: LAKE LA-4
- Registry model: [Lake LA-4](https://openairdocs.org/model/lake-la-4) (registry code 5110302) (OpenAirDocs)
- Category: Airplane
- Serial number: 297
- Airframe hours: 1100
- Engines: LYCOMING IO-360 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Keith Perrin
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 19, 1987, 14 hours before
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; private; airplane ratings: single-engine land, single-engine sea; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 297 total, 73 in this make and model, 260 as pilot in command, 14 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 90 statute miles
- Lowest ceiling: none
- Temperature: 61 °F, dew point 39 °F
- Altimeter: 29.00 inHg

## 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 19870715034859A](https://openairdocs.org/incident/19870715034859A), Jul 15, 1987: Conaer LA4, Cool Lake, AK, Substantial damage. Lost control on a water takeoff and ran the aircraft up on shore.

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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