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Accident description
Last updated: 11 December 2017
Status:Final
Date:Friday 13 October 1978
Time:16:44
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 200
Operator:Arctic Guide
Registration: N4048B
C/n / msn: 125
First flight: 1968
Engines: 2 Pratt & Whitney Canada PT6A-20
Crew:Fatalities: 1 / Occupants: 1
Passengers:Fatalities: 0 / Occupants: 1
Total:Fatalities: 1 / Occupants: 2
Airplane damage: Damaged beyond repair
Location:Barrow, AK (   United States of America)
Phase: Approach (APR)
Nature:Domestic Non Scheduled Passenger
Departure airport:Anaktuvuk Pass Airport, AK (AKP/PAKP), United States of America
Destination airport:Barrow-Point Barrow Airport, AK (PBA), United States of America
Narrative:
It was snowing at Barrow as Twin Otter N4048B approached the airport. Ice probably started to accumulate on the aircraft until the airplane stalled and crashed short of the runway. It appeared that the de-ice boots on the horizontal stabilizer were installed improperly.

Probable Cause:

PROBABLE CAUSE:
pilot in command - continued VFR flight into adverse weather conditions
personnel - maintenance,servicing,inspection: inadequate maintenance and inspection
airframe - flight control surfaces: other
miscellaneous acts,conditions - improperly installed
pilot in command - failed to use or incorrectly used misc.equipment
miscellaneous acts,conditions - anti-icing/deicing equipment-improper operation of/or failed to use
pilot in command - misused or failed to use flaps
FACTORS:
personnel - operational supervisory personnel: inadequate flight training-procedures
personnel - operational supervisory personnel: deficiency,company maintained eqpmt,services,regulation
weather - icing conditions-includes sleet,freezing rain,etc.

Classification:
Icing
VFR flight in IMC
Loss of control

Sources:
» NTSB


Photos

photo of de Havilland Canada DHC-6 Twin Otter 200 N7661
N7661 was later re-registered N4048B
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