As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOW OIL QTY INDICATION WITH LOW PRESSURE INDICATION, UNSCHEDULED LANDING, VFSG LH OF ENGINE NR 1 WAS REPLACED IAW AMM DMC B787-A-24-21-09-00B-520A-A/720A-A. ENGINE VENTS AND DRAINS INSPECTION WAS PERFORMED IAW DMC-B787-A-G71-00-00A-280A-A, REPLACEMENT OF ENGINE ACCESSORY GEARBOX SEAL AT THE VFSG DRIVE PAD IAW AMM DMC-B787-A-G72-64-01-00A-520/720A-A.