# NTSB ANC83LA151: de Havilland DHC-2, N3129S, Iliamna, AK, August 21, 1983

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: August 20, 1983, 16:30 local (Aug 21, 1983, 00:30 UTC)
- Place: Iliamna, AK
- Coordinates: 59.84999, -154.560012 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=59.8500&lon=-154.5600&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious, 3 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4157
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC83LA151
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4157/pdf
- Page: https://openairdocs.org/ntsb/ANC83LA151

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - weather condition - downdraft (contributing factor)
  - altitude - inadequate, pilot in command (cause)
- In flight collision with terrain/water, maneuvering
  - terrain condition - mountainous/hilly (contributing factor)

## Analysis

THE ACFT GOT INTO A DOWNDRAFT AND COLLIDED WITH HILLY TERRAIN. THE PILOT STATED THAT HE WAS SPOTTING CARIBOU AND SETTLED INTO THE SIDE OF A HILL. ACCORDING TO THE PASSENGERS THE ACFT WAS ABOUT 300 FT AGL PRIOR TO THE DESCENT TO GROUND CONTACT.

## Aircraft

- Registration: [N3129S](https://openairdocs.org/deregistered/N3129S-1984-05-15), registration cancelled 1984-05-15, S/N 269 (OpenAirDocs)
- Reported make and model: de Havilland DHC-2
- Registry model: [Dehavilland-Shawano DHC-2 MK.I](https://openairdocs.org/model/dehavilland-shawano-dhc-2-mk-i) (registry code 2806001) (OpenAirDocs)
- Category: Airplane
- Serial number: 269
- Airframe hours: 7000
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Destroyed
- Flight: Part 135
- Registered owner: Alaska North Flying Service
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, June 17, 1983, 90 hours before
- Departed: ANC, ANCHORAGE, AK
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; airline transport, commercial; airplane ratings: single-engine land, multi-engine sea, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 9,558 total, 1,116 in this make and model, 8,848 as pilot in command, 71 in the last 90 days, 40 in the last 30 days, 12 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 13 knots
- Visibility: 80 statute miles
- Lowest ceiling: 4,000 ft broken
- Temperature: 55 °F, dew point 45 °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 19830820043449A](https://openairdocs.org/incident/19830820043449A), Aug 20, 1983: Dhav DHC2*, Iliamna, AK, Substantial damage. During low flight spotting game, aircraft was caught in downdraft and crashed into ground.

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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