# NTSB ANC85LA104: de Havilland DHC-2, N10395, Ungalikthluk Rv, AK, June 22, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 21, 1985, 17:00 local (Jun 22, 1985, 01:00 UTC)
- Place: Ungalikthluk Rv, AK
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4506
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC85LA104
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4506/pdf
- Page: https://openairdocs.org/ntsb/ANC85LA104

## Sequence of events

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

- Loss of control - on ground/water, landing
  - weather condition - unfavorable wind (contributing factor)
  - weather condition - high wind (contributing factor)
  - weather condition - gusts (contributing factor)
  - compensation for wind conditions - improper, pilot in command (cause)
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - uncontrolled
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - dirt bank/rising embankment (contributing factor)

## Analysis

THE PLT REPORTED THAT WHEN HE WAS LANDING THE FLOAT PLANE ON A RIVER, AN EXTREME GUST OF WIND COCKED THE ACFT CAUSING LOSS OF CONTROL. SUBSEQUENTLY, THE ACFT STRUCK A RIVER BANK & WAS DAMAGED. THE PLT NOTICED THAT AFTER THE LANDING, THE WINDS HAD CHANGED, WERE SHIFTING TO THE SOUTHWEST & WERE MUCH STRONGER. HE ESTIMATED GUSTS TO 35 KTS.

## Aircraft

- Registration: [N10395](https://openairdocs.org/aircraft/N10395), registered now, S/N 1354, built 1959 (OpenAirDocs)
- Reported make and model: de Havilland DHC-2
- Registry model: [Dehavilland BEAVER DHC-2](https://openairdocs.org/model/dehavilland-beaver-dhc-2) (registry code 2800108) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1359
- Airframe hours: 11215
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: William Hubbard, doing business as Bristol Bay Lodge
- Registered owner: Bristol Bay Lodge
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 5, 1985, 25 hours before
- Destination: DLG, DILLINGHAM, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial; airplane ratings: multi-engine land, single-engine land, multi-engine sea, single-engine sea; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 2,849 total, 1,610 in this make and model, 2,676 as pilot in command, 30 in the last 90 days, 15 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 15 knots, gusting 35
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 48 °F, dew point 21 °F
- Altimeter: 30.00 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 19850621027019A](https://openairdocs.org/incident/19850621027019A), Jun 21, 1985: Dhav DHC2*, Ungalikthluk Ri, AK, Substantial damage. Wind gust picked up a wing after a river landing. Lost control and struck the river bank. Too much wind for aircraft

## Other investigations on N10395 (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 ANC01LA121](https://openairdocs.org/ntsb/ANC01LA121), Aug 21, 2001: de Havilland DHC-2 (N10395), Nondalton, AK, substantial damage. Probable cause: The pilot's inadequate compensation for gusty wind conditions. Factors associated with the accident were the pilot's inadequate weather evaluation, and wind gusts.

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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