Narrative:
Visibility was poor due to snowfall when the Islander departed Tacoma Airport for Oak Harbor. Shortly after takeoff the airplane collided with terrain in the residential area of Riverton Heights, WA. Unknown matter in the pitot tube had caused unreliable readings of the airspeed indicator.
PROBABLE CAUSE:
pilot in command - diverted attention from operation of aircraft
miscellaneous acts,conditions - instruments-misread or failed to read
FACTORS:
weather - low ceiling
weather - snow
terrain - high obstructions
instruments/equipment and accessories - flight and navigation instruments: airspeed
miscellaneous acts,conditions - obstructed
miscellaneous - foreign material affecting normal operations
» NTSB
» Thomas Brügge
» World Directory of Airliner Crashes
| Status: | Accident investigation report completed and information captured |
| Date: | Thursday 26 December 1974 |
| Time: | 18:05 |
| Type: |  Britten-Norman BN-2A Islander |
| Operator: | Harbor Airlines |
| Registration: | N66HA |
| MSN: | 31 |
| First flight: | 1968-10-18 (6 years 2 months) |
| Crew: | Fatalities: 1 / Occupants: 1 |
| Passengers: | Fatalities: 3 / Occupants: 5 |
| Total: | Fatalities: 4 / Occupants: 6 |
| Aircraft damage: | Damaged beyond repair |
| Location: | ca 1 km N of Seattle/Tacoma International Airport, WA (SEA) ( United States of America)
|
| Phase: | Initial climb (ICL) |
| Nature: | Domestic Scheduled Passenger |
| Departure airport: | Seattle/Tacoma International Airport, WA (SEA/KSEA), United States of America |
| Oak Harbor Airport, WA (ODW/KOKH), United States of America | |
| Flightnumber: | 308 |
Visibility was poor due to snowfall when the Islander departed Tacoma Airport for Oak Harbor. Shortly after takeoff the airplane collided with terrain in the residential area of Riverton Heights, WA. Unknown matter in the pitot tube had caused unreliable readings of the airspeed indicator.
Probable Cause:
PROBABLE CAUSE:
pilot in command - diverted attention from operation of aircraft
miscellaneous acts,conditions - instruments-misread or failed to read
FACTORS:
weather - low ceiling
weather - snow
terrain - high obstructions
instruments/equipment and accessories - flight and navigation instruments: airspeed
miscellaneous acts,conditions - obstructed
miscellaneous - foreign material affecting normal operations
Sources:
» BAAA-ACRO» NTSB
» Thomas Brügge
» World Directory of Airliner Crashes
Photos
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Seattle/Tacoma International Airport, WA to Oak Harbor Airport, WA as the crow flies is 93 km (58 miles).
Accident location: Approximate; accuracy within a few kilometers.
Distance from Seattle/Tacoma International Airport, WA to Oak Harbor Airport, WA as the crow flies is 93 km (58 miles).
Accident location: Approximate; accuracy within a few kilometers.
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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