As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE TREND DATA SHOWS A SUDDEN SHIFT IN EGT AND EGTHDM ALONG WITH EXTENSIVE HISTORY OF FAULT MESSAGE 77-10851 BOTTOM RIGHT EGT SIGNAL IS OUT OF RANGE INDICATION ERRORS ARE SUSPECT (#PRI 2) ETOPS SIGNIFICANT SYSTEM. GROUNDED - YES. REMOVED & REPLACED CJ9 HARNESS IAW AMM 73-21-06-400-803-F00. ACCOMPLISHED FADEC SYSTEM TEST IAW AMM 73-21-00-700-802-F00.