As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING T/C 08031001. AEVM HAD FAULT N2 TACHO LOSS E1. GROUNDED - YES. REF B737-900 FIM 77-31 TASK 805 CDS BITE DID NOT SHOW RELATED RPM FAULT. CLEARED AVM BITE FAULTS. REMOVED AND REPLACED #1 ENG N2 SENSOR IAW B737-900 AMM 77-11-02. N2 SPEED SENSOR INSTALLATION TEST/ ENG RUN + LEAK CHECK GOOD. AVM BITE SHOWS NO FAULTS. REPAIR CONFIRMATION SUCCESSFUL.