What was found
UPON TAKING RUNWAY, FUMES NOTICED IN THE COCKPIT. TAXIED CLEAR BACK TO THE RAMP. FUMES INCREASED, DECLARED EMERGENCY, EVACUATED THE AIRCRAFT. UPON FURTHER INSPECTION, FOUND S/O'S SEAT CONTROL C/B POPPED, AND STRONG ODOR FROM SEAT MOTOR. UPON FURTHER INSPECTION, FOUND S/O'S SEAT CONTROL C/B POPPED, AND STRONG ODOR FROM SEAT MOTOR. REMOVED AND REPLACED SEAT IAW MM 25-11-03-4, OPS CHECKS GOOD. RAN PACKS FOR ONE HOUR THREE DIFFERENT TIMES, NO EVIDENCE OF FUMES. WHILE SERVICING O2, DID NOT NOTICE ANY EVIDENCE OF FUMES IN E/E COMPARTMENT.