THE AIRPLANE RAN OFF THE END OF THE RUNWAY DURING A REJECTED TAKEOFF, COMING TO
REST ON A DIKE AND A TIDAL MUD FLAT. FDR DATA CONFIRMED THAT THE PITOT HEAT HAD
NOT BEEN SELECTED "ON" BY THE FLIGHTCREW. A BUILDUP OF SNOW AND/OR ICE IN THE
PITOT/STATIC SYSTEM TUBES AND PORTS RESULTED IN ERRONEOUS AIRSPEED READINGS
DURING THE ATTEMPTED TAKEOFF. SUBSTANTIAL DEVIATIONS FROM CHECKLIST PROCEDURES
WERE RECORDED ON THE CVR. 19 SECONDS ELAPSED BETWEEN THE TIME THAT THE AIRPLANE
ACTUALLY ACCELERATED THROUGH 60 KIAS (THE FIRST MARK ON THE AIRSPEED INDICATOR)
AND THE START OF THE REJECTED TAKEOFF.
Probable Cause
THE FAILURE OF THE FLIGHTCREW TO COMPLY WITH CHECKLIST PROCEDURES TO TURN ON AN
OPERABLE PITOT/STATIC HEAT SYSTEM, RESULTING IN ICE AND/OR SNOW BLOCKAGE OF THE
PITOT TUBES THAT PRODUCED ERRONEOUS AIRSPEED INDICATIONS, AND THE FLIGHTCREW'S
UNTIMELY RESPONSE TO ANOMALOUS AIRSPEED INDICATIONS WITH THE CONSEQUENT
REJECTION OF TAKEOFF AT AN ACTUAL SPEED OF 5 KNOTS ABOVE V1. (NTSB REPORT
AAR-95/01)