What was found
DURING CDU INTEROGATION FOUND MESSAGE 73-20772, PSS SIGNAL OUT OF RANGE NR 2 ENGINE ALL FLIGHT LEGS. ACFT GROUNDED. EEC TEST FAILS WITH SAME MAINTENANCE MESSAGE. REF FIM 73-26/803. REPLACED NR 2 ENGINE EEC IAW AMM 73-21-60-000-801-F00 AND 73-21-60-400-801-F00. ACCOMPLISHED PREPARE FOR THE TESTS TASK IAW AMM 73-21-00-840-801-F00, EEC TEST IAW AMM 73-21-00-700-804-F00, IDENT/CONFIG IAW AMM 73-21-00-700-808-F00, AND EEC DISCRETES TEST IAW AMM 73-21-00-700-809-F00, SYS RESTORED TO NORMAL. COMPLETED REMAINDER OF TEST. ACTUATORS TEST. TEST PASS. ALL OPS NORMAL. REF MM 73-21-00. VERIFYING PART INFORMATION.