As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE TREND DATA CONTINUES TO SHOW GREATER THAN EXPECTED EGT DATA SCATTER. ACFT GROUNDED. REPLACED J9 AND CJ9 HARNESSES ON NR 1 ENG REF MM 73-21-06-400-802-FOO AND MM 73-21-06-400-803-FOO. ACCOMPLISHED FADEC SYS TEST IAW AMM 73-21-700-802 AND EEC DISCRETES TEST IAW AMM 73-21-00-700-809.