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 INTERMITTENTLY BLANKS NO INDICATION. ACFT GROUNDED. AVM LOGGED MULTIPLE N2 RPM SIGNAL LOSS NR 1 AND NR 2 ALSO LOGGED MULTIPLE ENG 2 N2 SIGNAL LOSS MAINT MSG 31-63160. R & R N2 SENSOR REF AMM 77-11-02, LEAK AND OPS CHECKED GOOD.