What was found
#1 ENGINE EGT TREND DATA SHOWS RECENT INCREASE IN DELTA EGT/DECREASE IN EGTHDM. (#PRI2/ETOPS) TASK CARD 78273000CNR 20220325005. GROUNDED - YES. ALL LAST 10 FLTS AND FLT 0 SHOWS FAULT 77-20861 THE BOTTOM LEFT EGT SIGNAL (T495S3) OUT OF RANGE. AFTER CLEANING OF CJ10 HARNESS CONNECTORS, FOUND AT EEC CONN DP1010 WITH DP1012 REMOVED, RESISTANCE OF 25 MEG OHMS BETWEEN B- TO U- AND 7 MEG OHMS OF EACH PIN TO SHEILD. WITH DP1011 DISCONNECTED, RESISTANCE FOUND GOES AWAY. BAD CJ10 HARNESS. NIS SEATTLE. CJ9 HARNESS, EGT PROBES RESISTANCE CHECK WITHIN TOL. PER 77-21-01 AFTER CLEANING. STILL REQUIRES CJ10 HARNESS REPLACEMENT, OPS TEST, AND POST CLEANING READINGS. REPLACED CJ10 HARNESS ON #1 ENG REF MM 73-21-06-400-803-F00. OPS NML.