As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE PRV STATUS ILLUMINATED. PERFORMED FIM 36-10 FAULT TREE 847. FOUND ONE OF PRV TERMINAL LUG NUT LOOSE. RE-TIGHTENED PRV TERMINAL NUT PER AMM 36-11-18. PERFORMED IDLE RUN ON LEFT ENGINE PER AMM 71-00-00. OPS CHECK GOOD. NO MESSAGES ETOPS VERIFICATION COMPLIED WITH AC REMAINS ETOPS 180