As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - BTB DUE TO ENG1 CTL SYS FAULT AFTER ENG START. REMOVED VSV CONTROL UNIT IAW AMM75-33-51-000-801-A. INSTALLED VSV CONTROL UNIT PER AMM 75-33-51-400-801-A UP TO STEP 4.E. PERFORMED LEAK AND OPS CHECK OF #1 ENG VSVC PER AMM 71-00-00-700-827. LEAK AND OPS CHECK GOOD.