As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE (SN 802109) HAS SHORT TIME FAULT, MSG. 75-20571 HMU TBV CONTROL CURRENT IS OUT OF RANGE. REMOVED EEC IAW AMM REF 73-21-60-000-801. INSTALLED EEC IAW AMM 73-21-60-400-801. PERFORMED EEC TEST IAW AMM 73-21-60-400-801-F00, TEST PASSED. PERFORMED EEC DISCRETES TEST IAW AMM REF. 73-21-00-809-F00 TEST PASSED. PERFORMED FADEC SYSTEM TEST IAW AMM REF 73-21-00-700-802-F00, TEST PASSED. PERFORMED ACTUATORS TEST IAW AMM 71-00-00-700-807, TEST GOOD.