NTSB Identification: SEA86FA194.
The docket is stored on NTSB microfiche number 31277.
Accident occurred Wednesday, August 06, 1986 in VANCOUVER, WA
Aircraft: CESSNA 310C, registration: N310MT
Injuries: 1 Fatal,3 Minor.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

PLT NOT IFR RATED. ATTEMPTED DEPARTURE FROM OWN AIRSTRIP IN FOG DURING EARLY DAWN. POSITIVE RATE OF CLIMB NOT ESTABLISHED. ACFT CONTACTED TERRAIN 3/4 MILE FROM RUNWAY END. PSGRS REPORTED NO SENSATION OF POWER PROBS, BUT COMPLETE LOSS OF GROUND REF AT LIFTOFF. PVT PLT IN RT SEAT RECALLED IND AIRSPEED JUST BEFORE GROUND CONTACT AT ABT 100 MPH. CALCULATIONS BASED ON GROUND PROP MARKS SHOW AIRSPEED AT GROUND CONTACT WAS 155 MPH. GEAR AND FLAPS RETRACTED AFTER TAKEOFF. AIRSPEED INDICATOR REMOVED AND BENCH-CHECKED; INDICATED STEADY 10 MPH LOW AT ALL SPEEDS. PITOT-STATIC SYS CHECKED CLEAR OF PRE-IMPACT DEBRIS OR FOREIGN MATERIAL. ATTITUDE GYRO DAMAGED BY IMPACT; UNABLE TO DETERMINE PRE-IMPACT NOSE ATTITUDE REFERENCE.

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

PROPER CLIMB RATE..NOT ATTAINED..PILOT IN COMMAND


Contributing Factors

PLANNING/DECISION..POOR..PILOT IN COMMAND


Contributing Factors

FLIGHT INTO KNOWN ADVERSE WEATHER..INITIATED..PILOT IN COMMAND


Contributing Factors

OVERCONFIDENCE IN PERSONAL ABILITY..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..FOG


Contributing Factors

PITOT/STATIC SYSTEM..UNDETERMINED

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