As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER ONE ENGINE SPOOLED DOWN AND THEN BACK UP TO DIFFERENT POWER SETTING, NO EICAS MESSAGES. PERFORMED GENERAL ELECTRIC FAULT ISOLATION MANUAL LABEL BIT 350-20 AND ABD355-26. PERFORMED ENGINE STARTS ON BOTH CHANNEL A AND B WITH NO DEFECTS. PERFORMED HIGH POWER RUNS FOR THREE MINUTES WITH NO DEFECTS NOTED. RETURNED AIRCRAFT TO SERVICE.