What was found
FOUND SHORT TERM FAULT CODE 75-20401 VSV POSITION SIGNALS DISAGREE ON THE NR 1 ENGINE. ACFT GROUNDED. NR 1 ENGINE EEC TEST COMPLETED IAW AMM 73-21-00-700-804-F00. NO FAULTS FOUND. FAULT HISTORY SHOWS HEAVY FAULT HISTORY. WIRES FROM CONNECTORS DP1010 & DP1002 RANG OUT GOOD IAW WDM 75-31, TASK 804 STEP G5. CONNECTOR DP1010 AND DP1002 RECONNECTED. REMOVED AND REPLACED LEFTH VSV ACTUATOR ON THE NR 1 ENGINE IAW AMM 75-31-01-400-801-F00. OPS TESTED AND LEAK CHECKED GOOD IAW AMM 71-00-00-700-807-F00, TEST 12. GROUND VERIFICATION SUCCESSFUL.