Narrative:

I attempted to depart columbia, ca, airport in my aircraft. Admittedly, I am a relatively low time pilot with slightly less than 100 hours, and less than 6 hours in this type aircraft. After acceleration on the active runway, the plane started to lift off shortly after indicating 40 mph. I attempted to hold the plane on the ground, and it began to porpoise violently. Ultimately, I lost control and it veered off the runway and unfortunately, hit the parallel taxiway which had recently been repaved. Because of the repaving, the taxiway was quite a bit higher than the surrounding area and it caused significant damage to the nose gear and front of the airplane. Hindsight and the insights of several other type club members that were present suggest that the incident may have been precipitated by the modification of this aircraft with a more modern nose gear that elevates the nose (and lowers the tail) of the airplane. This situation also alters the angle of attack of the wing and probably caused the aircraft to lift off in ground effect too early. This hypothesis is supported by the fact that I had not experienced any problem during several hours of dual chkout including multiple lndgs when the aircraft was heavier and therefore more resistant to getting off the ground. I am not currently aware of any violation that I may have made although I would like to have the protection afforded by this process as necessary.

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Original NASA ASRS Text

Title: SMA LIFTS OFF PRIOR TO REACHING SUFFICIENT FLYING SPD. RWY EXCURSION.

Narrative: I ATTEMPTED TO DEPART COLUMBIA, CA, ARPT IN MY ACFT. ADMITTEDLY, I AM A RELATIVELY LOW TIME PLT WITH SLIGHTLY LESS THAN 100 HRS, AND LESS THAN 6 HRS IN THIS TYPE ACFT. AFTER ACCELERATION ON THE ACTIVE RWY, THE PLANE STARTED TO LIFT OFF SHORTLY AFTER INDICATING 40 MPH. I ATTEMPTED TO HOLD THE PLANE ON THE GND, AND IT BEGAN TO PORPOISE VIOLENTLY. ULTIMATELY, I LOST CTL AND IT VEERED OFF THE RWY AND UNFORTUNATELY, HIT THE PARALLEL TXWY WHICH HAD RECENTLY BEEN REPAVED. BECAUSE OF THE REPAVING, THE TXWY WAS QUITE A BIT HIGHER THAN THE SURROUNDING AREA AND IT CAUSED SIGNIFICANT DAMAGE TO THE NOSE GEAR AND FRONT OF THE AIRPLANE. HINDSIGHT AND THE INSIGHTS OF SEVERAL OTHER TYPE CLUB MEMBERS THAT WERE PRESENT SUGGEST THAT THE INCIDENT MAY HAVE BEEN PRECIPITATED BY THE MODIFICATION OF THIS ACFT WITH A MORE MODERN NOSE GEAR THAT ELEVATES THE NOSE (AND LOWERS THE TAIL) OF THE AIRPLANE. THIS SIT ALSO ALTERS THE ANGLE OF ATTACK OF THE WING AND PROBABLY CAUSED THE ACFT TO LIFT OFF IN GND EFFECT TOO EARLY. THIS HYPOTHESIS IS SUPPORTED BY THE FACT THAT I HAD NOT EXPERIENCED ANY PROB DURING SEVERAL HRS OF DUAL CHKOUT INCLUDING MULTIPLE LNDGS WHEN THE ACFT WAS HEAVIER AND THEREFORE MORE RESISTANT TO GETTING OFF THE GND. I AM NOT CURRENTLY AWARE OF ANY VIOLATION THAT I MAY HAVE MADE ALTHOUGH I WOULD LIKE TO HAVE THE PROTECTION AFFORDED BY THIS PROCESS AS NECESSARY.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.