# NTSB ANC86LA147: de Havilland DHC-2, N100KL, Port Alsworth, AK, September 8, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 7, 1986, 16:00 local (Sep 8, 1986, 00:00 UTC)
- Place: Port Alsworth, AK
- Coordinates: 60.19997, -154.280899 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=60.2000&lon=-154.2809&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4733
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC86LA147
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4733/pdf
- Page: https://openairdocs.org/ntsb/ANC86LA147

## Sequence of events

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

- On ground/water collision with object, takeoff - roll/run
  - weather condition - rain (contributing factor)
  - preflight planning/preparation - inadequate, pilot in command (contributing factor)
  - inattentive, pilot in command (contributing factor)
  - object - tree(s) (contributing factor)
  - visual lookout - not maintained, pilot in command (cause)
  - aborted takeoff - not performed, pilot in command (cause)
  - directional control - inadequate, pilot in command (cause)

## Analysis

THE PILOT WAS UNABLE TO AVOID A LARGE FLOATING LOG IN HIS WATER LANE PATH DURING TAKEOFF. HE STRUCK THE LOG, LOST CONTROL OF THE AIRPLANE AND CRASHED.

## Aircraft

- Registration: [N100KL](https://openairdocs.org/aircraft/N100KL), registered now, S/N 758 (1483), built 1955 (OpenAirDocs)
- Reported make and model: de Havilland DHC-2
- Registry model: [Dehavilland DHC-2 MK. I(L20A)](https://openairdocs.org/model/dehavilland-dhc-2-mk-i-l20a) (registry code 2808002) (OpenAirDocs)
- Registry engine: [Pratt & Whitney PT6A series](https://openairdocs.org/engine/pratt-whitney-pt6a-series) (registry code 52034, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 758
- Airframe hours: 6700
- Engines: P&W 985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Iliamna Lake Resort
- Registered owner: Saint Cloud Aviation Of Ak
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 15, 1986
- Departed: MULCHATNA RIVER, AK
- Destination: ILIAMNA, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; commercial; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 4,000 total, 4,000 in this make and model, 1,350 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 5 statute miles
- Lowest ceiling: 1,500 ft overcast
- Temperature: 50 °F

## 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 19860907045249A](https://openairdocs.org/incident/19860907045249A), Sep 7, 1986: Dhav DHC2/, Port Alsworth, AK, Substantial damage. The floatplane struck a log during a river takeoff and ended up on a gravel bar. Rain and fogged windows factors.

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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