What was found
WHILE ACCOMPLISHING T/C 78273000, FOUND MESSAGE 77-20871, TOP LT EGT SIGNAL OUT OF RANGE, ON NR 1 ENGINE, ECONOMIC FAULT. ACFT GROUNDED. BEFORE CLEANING T49.5 TEMPS WERE S1 249.10, S2 226.50, S3 236.09, S4 421.05. ACCOMPLISHED FIM 77-21, TASK 804 INITIAL EVALUATION. PERFORMED EGT CLEANING IAW AMM 77-21-00-140-801. RAN ENGINE FOR 5 MINUTES T49.5, TEMPS: S1 287.91, S2 293.13, S3 293.19, S4 286.95. PERFORMED ELECTRONIC ENGINE CONTROL BITE TEST IAW 73-21-00-700-804-F00, FAULT MESSAGE IS NOT CURRENT. REF LOG PAGE 11490760 FOR ELECTRONIC ENGINE CONTROL BITE TEST RECENT FAULTS RECHECK: PERFORMED ELECTRONIC ENGINE CONTROL BITE TEST IAW AMM TASK 73-21-00-740-803-F00. NO FAULTS FOUND.