NTSB Identification: SEA83IA034
Scheduled 14 CFR Part 135: Air Taxi & Commuter
Incident occurred Wednesday, December 22, 1982 in KLAMATH FALLS, OR
Probable Cause Approval Date: 12/22/1983
Aircraft: SWEARINGEN SA-226TC, registration: N5475M
Injuries: 11 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

DURING TAKEOFF ON RUNWAY 14 WITH THE WINDS FROM 310 DEG AT 17 KNOTS, SATISFACTORY ACCELERATION OCCURRED THROUGH 70 KNOTS FOLLOWED BY A SLOWING RATE OF ACCELERATION AT 80 KNOTS. THE CAPTAIN THEN REDUCED POWER AND SHORTLY THEREAFTER FELT THE LEFT MAIN TIRES STRIKE SOMETHING AND THE AIRCRAFT BEGAN A LEFT YAW. ATTEMPTS TO REGAIN DIRECTIONAL CONTROL WERE UNSUCCESSFUL AN N5475M ROLLED OFF THE EAST SIDE OF THE RUNWAY AND STRUCK A SNOWBANK. THE CREW SHUT DOWN THE ENGINES AND EVACUATED THE PASSENGERS. THE DOWNWIND TAKEOFF WAS NECESSITATED BY VISIBILITY REQUIREMENTS FOR THE DEPARTURE.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

TERRAIN CONDITION..SNOW COVERED

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

WEATHER CONDITION..UNFAVORABLE WIND

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

DIRECTIONAL CONTROL..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

AIRCRAFT PERFORMANCE,TAKEOFF CAPABILITY..DETERIORATED



Contributing Factors

TERRAIN CONDITION..SNOWBANK

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