As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING ENGINE RUN, RT EFC CHAN 2 MESSAGE SHOWS ON EICAS DISPLAY. REMOVED AND REPLACED NR 2 ENGINE OUTBD THRUST REVERSER TRANSDUCER IAW AMM 78-36-03. PERFORMED SATISFACTORY OPS CHECK IAW AMM 71-00-00, NO DEFECTS NOTED, EICAS MESSAGE DID NOT COME BACK.