# NTSB ANC91LA125: De Havilland DHC-2, N5371G, Ugashik, AK, August 14, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 14, 1991, 14:15 local (22:15 UTC)
- Place: Ugashik, AK
- Coordinates: 58.799903, -156.8992 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=58.7999&lon=-156.8992&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report March 10, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5602
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA125
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5602/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA125

## Probable cause

WAS THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL OF THE AIRPLANE DURING THE TAKEOFF RUN. CONTRIBUTING TO THE ACCIDENT WAS THE ROUGH WATER.

## 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
  - terrain condition - water,rough (contributing factor)
  - directional control - not maintained, pilot in command (cause)
- Dragged wing,rotor,pod,float or tail/skid, takeoff - roll/run
- Nose over, takeoff - roll/run

## Analysis

DURING THE TAKEOFF ON THE WATER, THE PILOT LOST CONTROL OF THE AIRPLANE AND THE LEFT WING TIP STRUCK THE WATER.  THE AIRPLANE NOSED OVER ON ITS BACK AND SANK INTO THE LAKE.

## Aircraft

- Registration: [N5371G](https://openairdocs.org/aircraft/N5371G), registered now, S/N 1075, built 1951 (OpenAirDocs)
- Reported make and model: DE HAVILLAND DHC-2
- Registry model: [Dehavilland BEAVER DHC-2 MK.1](https://openairdocs.org/model/dehavilland-beaver-dhc-2-mk-1) (registry code 2800102) (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: 1075
- Airframe hours: 9629
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: 3
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, January 2, 2000, 74 hours before
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 5,083 total, 117 in this make and model, 4,860 as pilot in command, 188 in the last 90 days, 85 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 90° at 20 knots, gusting 30
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 61 °F, dew point 39 °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 19910814034309A](https://openairdocs.org/incident/19910814034309A), Aug 14, 1991: Dhav DHC2MK1, Ugashik, AK, Substantial damage. On crosswind water takeoff upwind wing came up. Left wing hit water. Cartwheel. Nosed over.

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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