As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND FAUL 77-10851 BOTTOM RIGHT S2 EGT SENSOR OUT OF RANGE ECONOMIC FAULT ON NR 1 ENGINE. GROUNDED - YES. ACCOMPLISHED FIM 77-21 TASK 802. PERFORMED EGT CLEANING OF NR 1 ENGINE REF AMM 77-21-00. PERFORMED EEC TEST OF NR 1 ENGINE EEC TEST PASS REF AMM 73-21-00 49.5 BEFORE S1: 58.37 S2: 32.75 S3: 36.50 S4: 74.97. 49.5 AFTER S1: 43.41 S2: 26.75 S3: 27.88 S4: 56.38.