What was found
WHILE PEFORMING T/C 78273000, FOUND MAINT MSG 77-20862, "THE BOTTOM LEFT EGT SIGNAL (T495S3) IS OUT OF RANGE" ON #2 ENG ESN 963476. GROUNDED - YES. REF B737-900 FIM 77-21 TASK 803 FOLLOWING PREVIOUS CLEANING PERFORMED EARLIER, & FAULT HISTORY HIT ON EVERY LEG. REMOVED AND REPLACED ENG 2 CJ10 HARNESS REF B737-900 AMM TASK 73-21-06-400-803-F00. PERFORMED FADEC SYSTEM TEST, AMM TASK 73-21-00-700-802-F00. - ALL TESTS PASS.