# NTSB ANC91LA022: De Havilland DHC-3, N212NY, Nome, AK, January 28, 1991

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: January 28, 1991, 13:15 local (17:15 UTC)
- Place: Nome, AK
- Coordinates: 64.710647, -164.620086 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=64.7106&lon=-164.6201&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious, 4 minor, 5 uninjured
- Status: Completed, report May 7, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5515
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA022
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5515/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA022

## Probable cause

THE FAILURE OF THE 1, 2, 6, 7, 8 AND 9 PISTON LINKRODS WHICH WERE BROKEN AT THE MASTER ROD ATTACH END.  CONTRIBUTING TO THE ACCIDENT WAS THE ROUGH, UNEVEN TERRAIN.

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - engine assembly,connecting rod - fractured (cause)
  - engine assembly,piston - cracked (cause)
- Forced landing, descent - emergency
- On ground/water collision with object, landing - roll
  - terrain condition - rough/uneven (contributing factor)

## Analysis

DURING CLIMBOUT THE ENGINE LOST POWER.  THE PILOT MADE AN EMERGENCY LANDING ON THE ICE PACK.  AFTER REMOVAL OF THE AIRPLANE ENGINE, EXAMINATION REVEALED THE NUMBER 1, 2, 6, 7, 8, 9 PISTON LINKRODS WERE BROKEN AT THE MASTER ROD ATTACH END.

## Aircraft

- Registration: [N212NY](https://openairdocs.org/deregistered/N212NY-2018-01-11), registration cancelled 2018-01-11, S/N 330, built 1959 (OpenAirDocs)
- Reported make and model: DE HAVILLAND DHC-3
- Registry model: [Dehavilland OTTER U-1A](https://openairdocs.org/model/dehavilland-otter-u-1a) (registry code 2800203) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 330
- Airframe hours: 7210
- Engines: P&W R-1340-59 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Donald L. Olson
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, January 25, 1991, 3 hours before
- Departed: WAA, WALES, AK
- Destination: DIO, LITTLE DIOMEDE, AK
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; airline transport; airplane ratings: single-engine sea, multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 13,000 total, 1,200 in this make and model, 13,000 as pilot in command, 10 in the last 90 days, 10 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 10 knots, gusting 15
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: -15 °F, dew point -0 °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 19910128001219A](https://openairdocs.org/incident/19910128001219A), Jan 28, 1991: Dhav DHC3, Nome, AK, Substantial damage. Engine lost power over bering sea. Landed on rough ice. Engine had several broken rods and rod bearings.

## Other investigations on N212NY (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 NYC75FFA28](https://openairdocs.org/ntsb/NYC75FFA28), Feb 8, 1975: Dehavilland DHC-2 (N212NY), Dexter, NY, substantial damage

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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