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. ACCOMPLISHED AVM SIGNAL CONDITIONER BITE REF FIM 77-31, TASK 801, SHOWS "N2 TACHO LOSS E2" MSG. ACCOMPLISHED FIM 77-31, TASK 805 "N2 SPEED SENSOR DATA FAULT ISOLATION", CDS BITE PROCEDURE REF FIM 31-62, TASK 801 AND FIM 31-62, TASK 846 "ENG 2, N2 RPM INVALID" FAULT ISOLATION, SHOWS INTERMITTENT FAULT "ENGINE 2, N2 RPM INVALID MSG 31-63160" SINCE LAST LEG 14. ALSO ACCOMPLISHED FIM 31-62, TASK 846. R & R NR 2, ENGINE N2 SPEED SENSOR REF AMM TASK 77-11-02. ACCOMPLISHED TEST 3A IDLE POWER LEAK CK AND TEST 13 ENGINE RUN/EEC BITE CHECK, NO FAULTS. ALSO CHECKED AVM , NO FAULTS.