As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE ACMS DATA SHOWS INTERMITTENT N2 VALUES FROM OIP REPORT 7. TAKEOFF AND CRUISE ACMS REPORTS SHOW NORMAL PARAMETERS. ACFT GROUNDED. REPLACED THE N2 SPEED SENSOR ON THE NR 2 ENGINE IAW AMM 77-11-01. ENGINE IDLE LEAK CHECKED GOOD AND BITE CHECK SHOWED NO FAULTS.