What was found
NR 1 ENGINE EXPERIENCED AN INCREASE IN DELTA EGT AND A DECREASE IN EGT HOT DAY MARGIN. DELTA FUEL FLOW AND CORE SPEED REMAIN THE SAME. GROUNDED - YES. CHECKED TEMP OF ALL FOUR SENSORS. FOUND LOWER RIGHT (S2) HAD ALL DASHES, NO OUTPUT. REPLACED S2 PROBE PER B737-800 AMM TASK 77-21-01-400-801-F00. ACCOMPLISHED TEST PER FIM SUBTASK 77-21-800-002-F00. OPS GOOD. NOTE THAT CONNECTOR TO PROBE THE TWO SOCKETS WERE A DULL GRAY. CLEANED WITH ALCOHOL.