What was found
NR 2 ENGINE ECM DATA SHOWS INTERMITTENT RECORDING OF CORE VIBRATION SENSOR. ACFT GROUNDED. ACCOMPLISHED BITE CHECK OF AVM. SELF TEST OK. FAULT HISTORY HAS 32 OCCURENCES OF N2 TACH LOSS E2. CHECKED RESISTANCE OF NR 2 ENG T422 N2 SPEED SENSOR. RESISTANCE OK. CHECKED RESISTANCE OF MW0312 ENGINE HARNESS BETWEEN DP1201 AND DP1234. HIGH RESISTANCE FOUND. REF FIM 77-31/805. REPLACED MW0312 ENGINE HARNESS. EEC TEST AND ACTUATORS TESTS PASS. REF AMM 71-51-03/401. REPAIR CONFIRMATION OF 77-31/805 COMPLETED. NO AVM FAULTS.