As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 5 BRAKE INDICATED ON DURING TAXI DRIFTED LEFT. THEN OFF, ATTEMPTED T/O AND HAD SAME INDICATION @80 KTS. CONDUCTED RTO AND RETURNED TO RAMP. TSI 2779 COMPLETED AND PROBLEM CORRECTED IN ASSOCIATED TSI ACTION IAW AMM 32-42-57-00, MAIN TACHOMETER REPLACED. ACFT TAXI CHECK TESTED GOOD. ACFT OK FOR SERVICE.