As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE ACMS DATA SHOWS INTERMITTENT, N2 VALUES FROM OIP REPORT 7. TAKEOFF AND CRUISE ACMS REPORTS SHOW NORMAL PARAMETER, ACFT GROUNDED. REPLACED NR 1 ENGINE N2 SPEED SENSOR. ACCOMPLISHED ENGINE IDEL LEAK CHECK NO LEAKS NOTED AT N2. ACCOMP. EEC BITE TEST. NO RECENT FAULTS FOUND. ACCOMPLISHED AAVM SIGNAL CONDITIONER BITE. SELF TEST PASS AND NO FAULT HISTORY. REF MM 77-11-02-400-801, FIM 77-31 TASK 801 & 77-31, TASK 801 & MM 71-00-00-800-811, TEST 13 & 3A.