As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AS POWER WAS BROUGHT UP FOR TAKEOFF, FLIGHT ATTENDANTS IN BACK NOTED STRONG ROTTEN EGG ODOR. TAKEOFF REJECTED AT 15 KNOTS. REMOVED AND REPLACED LEFT RECIRCULATION FAN FILTER AND RIGHT RECIRCULATION FAN FILTER IAW AMM 21-25-01. ACCOMPLISHED MCM CARD 05-96-70. OPERATIONAL CHECK GOOD. AIRCRAFT WAS GROUNDED.