What was found
GE DIAGNOSTICS REPORTS #2 ENGINE TREND DATA SHOWS A SHIFT IN EGT HOT DAY MARGIN, ALL OTHER PARAMETERS NORMAL. EGT INDICATION SYSTEM ERRORS ARE SUSPECT. GROUNDED - YES. PERFORMED EEC BITE TEST ON #2 ENGINE, REF B737-800 AMM 73-21-00-740-803-F00. FOUND FAULTS 77-20862 AND 77-020872 STILL ACTIVE, ALSO T49.5 S3 PROBE SHOWED DASHES DURING VIEWING OF INPUT MONITORING. PERFORMED EGT SYSTEM INSPECTION PER B737-800 AMM 77-21-01-200-801-F00, FOUND CJ10 HARNESS SHORTED TO SHIELDING. REMOVED AND REPLACED CJ10 HARNESS, REF B737-800 AMM 73-21-06/401. OPERATIONAL TESTS GOOD.