What was found
TECH SERVICES REQUEST TO REPLACE NR 1 ENGINE J9 HARNESSES DUE TO PERSISTENT EGT INDICATION SYS ERRORS. ACFT GROUNDED. REPLACED J9 HARNESS REF MM 73-21-06-802-F00. NO DEFECTS NOTED FOR CJ9 HARNESS. FOUND S2, T49.5 PROBE SIGNAL OUT OF RANGE ON ALL FLT LEGS. INITIAL READINGS: S1- 116.37, S2- 156.75, S3- 81.37, S4- 137.37. AFTER READINGS: S1- 28.62, S2- 18.75, S3- 19.75, S4- 33.87. REPLACED S2 T49.5 PROBE REF MM 77-21-01-400-801-F00. ACCOMPLISHED ACTUATORS TEST REF MM 71-00-00-700-807-F00. OPS CK GOOD. ACCOMPLISHED ELECTRONIC ENGINE CONTROL DISCRETES TEST REF MM 73-21-00-700-809-F00. OPS CK GOOD. ACCOMPLISHED IDENT/ CONFIG TEST REF MM 73-21-00-700-808-F00. OPS CK GOOD. ACCOMPLISHED ELECTRONIC ENGINE CONTROL TEST REF MM 73-21-00-700-804-F00. OPS CK GOOD.