ANC91LA022

NTSB accident investigation · De Havilland DHC-3 · Nome, AK · January 28, 1991

Accident · Serious injuriesLimited investigationFinal report
Date
January 28, 1991, 13:15 local (17:15 UTC)
Place
Nome, AK
Injuries
2 serious, 4 minor, 5 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N212NYDe Havilland DHC-3
Weather
Visual (VMC) · Day
Status
Completed · report May 7, 1993
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19910128001219A
Case key
5515

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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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

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(total) - mech failure/malfTakeoff - initial climb
Engine assembly,connecting rod - fracturedCause
Engine assembly,piston - crackedCause
Forced landingDescent - emergency
On ground/water collision with objectLanding - roll
Terrain condition - rough/unevenFactor

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
Reported as
De Havilland DHC-3
Category
Airplane
Serial number
330
Airframe hours
7,210
Engine
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

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
33
Certificate
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.

Other investigations on N212NY · 1

Matched to the same aircraft by N-number and date.