# NTSB ANC91LA021: De Havilland DHC-2, N4294K, Two Moon Bay, AK, January 18, 1991

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: January 18, 1991, 11:30 local (15:30 UTC)
- Place: Two Moon Bay, AK
- Coordinates: 60.789379, -145.610992 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=60.7894&lon=-145.6110&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious, 2 minor
- Status: Completed, report July 13, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5514
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA021
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5514/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA021

## Probable cause

THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN AIRSPEED ABOVE A STALL WHILE MANEUVERING IN MOUNTAINOUS TERRAIN.

## Analysis

THE PILOT STATED HE STARTED A TURN TO THE RIGHT, LOST CONTROL OF THE AIRPLANE, STALLED, AND CRASHED INTO THE SIDE OF THE MOUNTAIN.

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - airspeed - not maintained, pilot in command (cause)
  - stall - inadvertent, pilot in command
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - mountainous/hilly

## Aircraft

- Registration: N4294K (not matched to a registry record)
- Reported make and model: DE HAVILLAND DHC-2
- Category: Airplane
- Serial number: 1546
- Airframe hours: 12477
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, December 14, 1990, 36 hours before
- Departed: CDV, CORDOVA, AK
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; 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: 5,300 total, 620 in this make and model, 5,000 as pilot in command, 150 in the last 90 days, 50 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 15 knots, gusting 30
- Visibility: 3 statute miles
- Lowest ceiling: none
- Temperature: 34 °F, dew point 28 °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 19910118000729A](https://openairdocs.org/incident/19910118000729A), Jan 18, 1991: Dhav DHC2*, Two Moon Bay, AK, Substantial damage. Lost control climbing out from water takeoff. Encountered severe turbulence. Struck trees.

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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