As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF DEFECT 60349702. DURING EEC BITE TEST FOUND FAULT 77-20861. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 77-21 TASK 803 BOTTOM LEFT EGT SIGNAL OUR RANGE. REMOVED AND REPLACED CJ0 HARNESS REF B737-900 AMM 73-21-06. ACCOMPLISHED FADEC SYSTEM TEST REF AMM 73-21-00. ALL TEST PASSED. NO FURTHER DEFECTS NOTED.