What was found
BTB - RIGHT FMC FAILED AFTER STARTING LEFT ENGINE, SINGLE L FMC OPERATION FMS MSG RT FMC "TIMEOUT", (R) EHSI "MAP" MSG DISPLAYED, (R) CDU TOTALLY BLANK). PERFORMED FIM TASK 34-61-00. LEFT AND RIGHT FMC BITE TESTS PASSED. NO CDU/EICAS MSGS NOTED. AS A PRECAUTION PERFORMED NR 1 AND NR 2 ENGINE RUN PER AMM 71-00-00 FMC SYS. TESTS PASSED ON GROUND PER AMM 34-61-00. NO OTHER DEFECTS NOTED. OK TO CONTINUE.