As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE VIBRATION INDICATION DISAPPEARED INTERMITTENTLY DURING FLIGHT. PERFORMED FIM 77 05 00 810 805. BITE TESTED AVM REF FIM 77 31 00 810 801. SELF TEST SHOWS NO FAULTS. FAULT HISTORY HAS MULTIPLE FAULT NR 46. DIRECTS TO FIM 77 31 TASK 803 INDICATES INTERNAL POWER PROBLEM IN SIGNAL CONDITIONER UNIT. REPLACED SAME. OPS NORMAL REF AMM 77 31 00 810 803 F00 77 31 03 000 801 F00.