What was found
FAULT CODE NR 2 ENGINE 73-21272 ALTERNATOR VOLTAGE INPUT TO THE EEC OUT OF RANGE SHORT TERM FAULT FLIGHT LEGS 0, 1, 5, 10. ACFT GROUNDED. ACCOMPLISHED EEC BITE ON NR 2 ENGINE AND VERIFIED FAULT CODE 73-21272 IS ACTIVE ON LEG 0. PROCEDURE USED IAW CHAPTER 5 TABLE 3 ITEM 9. REMOVED CONNECTORS DP0707 & DP0808 AT EEC AND CONNECTORS AT EEC ALTERNATOR DP0702 & DP0802. COMPARED RESISTANCE CHECKS FROM BOTH CHANNEL A & B OF WIRE HARNESS. ALL CHECKED GOOD. CHECKED RESISTANCE VALUES AT ALTERNATOR OF BOTH CHANNELS BOTH READ SAME. RECONNECTED DP0702 & DP0802. CHECKED RESISTANCE VALUES AT DP0707 & DP0808 TO ALTERNATOR RESISTANCE READINGS ARE WITHIN LIMITS. DUE TO HISTORY OF THIS FAULT AND FIM TASK, REPLACED EEC ON NR 2 ENGINE WITH SERVICEABLE ONE. CLOSED ENGINE COWLS. ACCOMPLISHED FADEC SYSTEM TEST ALL PASS. VERIFIED SOFTWARE COMPARES WITH #1 ENGINE. ACCOMPLISHED EEC TEST, TEST PASS NO EEC TEST FAULTS. ACCOMPLISHED ACTUATORS TEST, TEST PASS NO ACTUATORS TEST FAULTS. ACCOMPLISHED EEC DISCRETES TEST, TEST PASSES. IAW AMM 73-21-00-700-802, 73-21-60-400-801 REPAIR CONFIRMATION TEST PASSES. NO RECENT FAULTS STORED. FIM 73-27 TASK 804.