As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIAGNOSTICS REPORTS NR 1 ENGINE CORE VIBRATION DATA INTERMITTENTLY REPORTS ZEROS FROM THE FRONT AND REAR SENSORS. AAVM STILL LOGS LOSS OF N2 SIGNAL, ALSO CDS LOGGED 31-63150, ENGINE 1 N2 RPM INVALID ON BOTH DEUS AS INTERMITTENT AND ON VARIOUS FLT LEGS. VERIFIED ALL WIRES AT TB 3102 YA/YB 49 ARE SECURED REF WDM 77-12-21 IAW TSR R & R MW0312 REF MM 71-51-03-400-801-F00, EEC & ACTUATOR TEST PASSED.