As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO COARSEN ANNUNCIATOR ILLUMINATED UPON INITIAL POWER APPLICATION FOR TAKEOFF. TAXIED OFF THE RUNWAY AND RETURNED TO GATE. ANNUNCIATOR TURNED OFF AS SOON AS AUTO COARSEN SWITCH WAS TURNED OFF. PERFORMED AUTO COARSEN TEST IAW 61-22-00-05, OPS CHECK GOOD.