As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS: " L STRUT DUCT LEAK" FL 390, QRH ACCOMPLISHED L DUCT PRESS 5 PSI RT DUCT PRESS 31 PSI. FOUND LOOSE V-BAND CLAMP IN PYLON JUST FWD OF PRSOV RE-TORQUED V-BAND CLAMP AND RAN ENGINE, NO DUCT LEAK NOTED AT THIS TIME. REF AMM 70-50-00 AND 71-00-00.