PLT ABORTS TKOF.

Narrative

AT LCL TIME A TKOF ROLL WAS INITIATED ON RWY 26; A 3497 FT RWY; AT KNOXVILLE'S DOWNTOWN ISLAND ARPT. THE ACFT; A CESSNA 337C; WAS LOADED TO A WT OF 4197 LBS; 203 LBS UNDER THE 4400 LBS MAX ALLOWABLE GROSS WT. THE WT AND BAL WAS COMPUTED BY THE PLT PRIOR TO TKOF. THE TKOF APPEARED NORMAL AS THE AIRSPD BEGAN TO INCREASE TOWARD A ROTATION SPD OF 85 MPH. I CHKED THE AIRSPD AS IT WAS PASSING THROUGH 50 MPH AND THEN CHKED ALL PWR SETTINGS. ALL WERE IN THE GREEN WITH NORMAL NUMBERS. I AGAIN CHKED THE AIRSPD AND IT WAS ABOUT 60 MPH. THE ACFT BEGAN TO FEEL AS IF IT WERE AT OR NEAR ROTATION SPD. I AGAIN CHKED PWR FOR NORMAL READINGS AND ALL NUMBERS WERE GREEN. I REFERENCED THE AIRSPD PRIOR TO ROTATION AND IT WAS STILL INDICATING 60 MPH. I REALIZED I HAD SERIOUS PROBS WITH THE ACFT. PWR WAS REDUCED TO IDLE AND A REJECTED TKOF INITIATED WITH AN ESTIMATED 1500 FT OR MORE OF RWY REMAINING. MAX BRAKING WAS APPLIED. THE RWY CONDITIONS WERE DRY; AND THE NEW TIRES DID NOT SKID OR SLIDE ON THE RWY. AT APPROX 40 MPH BRAKE FADE STARTED TO BECOME A FACTOR; STILL UNDER MAX BRAKING; THE ACFT EXITED THE RWY AT AN ESTIMATED SPD OF 15 MPH. THE ACFT WENT APPROX 50-75 FT PAST THE END OF THE RWY. NO SKID MARKS WERE LEFT IN THE GRASS. THE ACFT WAS NOT DAMAGED; NOR WAS THERE ANY DAMAGE TO THE RWY ENVIRONMENT. THE ACFT WAS TAXIED BACK TO FBO WHERE A&P INSPECTED THE ACFT. HE FIRST VISUALLY INSPECTED THE BRAKES AND FOUND NOTHING WRONG IN APPEARANCE. THEN; HE REMOVED THE PITOT FINDING A FOREIGN OBJECT LODGED IN THE PITOT. HE REMOVED THE OBJECT FROM THE PITOT AND THEN HE PRONOUNCED THE ACFT AIRWORTHY. A NORMAL TKOF WAS MADE AND THE ACFT WAS FLOWN TO ITS BASE AT TRI-CITY TENNESSEE WHERE; AT THE PLT'S REQUEST; IT WAS PUT IN THE SHOP TO FURTHER EVALUATE THE EXTREME BRAKE FADE.