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:
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.
VFR flight in IMC
Loss of control
accident date: 13-10-1978
type: de Havilland Canada DHC-6 Twin Otter 200
registration: N7661
| Status: | Accident investigation report completed and information captured |
| Date: | Friday 13 October 1978 |
| Time: | 16:44 |
| Type: |  de Havilland Canada DHC-6 Twin Otter 200 |
| Operator: | Arctic Guide |
| Registration: | N4048B |
| 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 |
| Aircraft damage: | Damaged beyond repair |
| Location: | near Barrow-Point Barrow Airport, AK (PBA) ( United States of America)
|
| Phase: | Approach (APR) |
| Nature: | Domestic Non Scheduled Passenger |
| Departure airport: | Anaktuvuk Pass Airport, AK (AKP/PAKP), United States of America |
| Barrow-Point Barrow Airport, AK (PBA), United States of America |
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:
IcingVFR flight in IMC
Loss of control
Sources:
» NTSBPhotos
accident date: 13-10-1978
type: de Havilland Canada DHC-6 Twin Otter 200
registration: N7661
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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