As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING RIGHT ENGINE CONTROL EICAS MESSAGE. FOLLOWED FIN TASK 73-21 TREE 878. RT ENGINE CONTROL. PIMU CHECK AND FOUND CHANNEL A & B DATA BUSS INOPERATIVE. CYCLE RT PIMU CIRCUIT BREAKER AND RT ENGINE PIMU. TEST PASSED, THEN RT ENG. RUN CHECK OK IAW AMM 71-00-00/501.