What was found
WHILE ACCOMPLISHING T/C 78273000 FAULT CODE APPEARED ON NR 1 ENGINE 77-10851, THE BOTTOM RIGHT EGT SIGNAL (T495S2) IS OUT OF RANGE, ECONOMIC MUST BE CORRECTED IN 500 HRS. GROUNDED - YES. PERFORMED FIM 77-05 TASK 801 AND FIM 73-00 TASK 801. FOUND FAULT CODE 77-10851 NR 1 ENGINE RIGHT BOTTOM EGT SIGNAL OUT OF RANGE. ACCOMPLISHED EGT INDICATION CLEANING REF AMM 77-21-00. ACCOMPLISHED RESISTANCE CHECKS OF EGT SYSTEM NO DEFECTS NOTED REF AMM 77-21-01. PERFORMED FIM 71-06 TASK 805. AFTER CLEANING OF EGT SENSORS ACCOMPLISHED AMM 71-00-00 POWER ASSURANCE CHECK. ENGINE PARAMETERS WITHIN LIMITS.