As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE RT ENGINE EEC C1 & RT ENGINE CONTROL STATUS MESSAGE INDICATED ON LOWER EICAS. PIMU BITE CODE 351-19NEEC CH-A/B FMU TRACK FAIL, WIRE CHECK FROM EEC TO FMU CHECKED GOOD. R & R RT ENGINE FUEL METERING UNIT IAW AMM 73-21-01-404-001, OPS AND LEAK CHECKED OK. AFTER ENGINE RUN PIMU BITE CHECK COMPLETED ON RT ENGINE, NO FAULTS NOTED. OK FOR FURTHER SERVICE.