As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TRANSIT CHECK, A HYDRAULIC LEAK WAS DETECTED IN RIGHT ENGINE. MAINTENANCE PERSONNEL PERFORMED REVISION DETECTING DRAIN MAST WITH HYDRAULIC LEAK OF 13 DROPS PER MINUTE; SO THE RIGHT ENGINE EDP WAS REPLACED IAW DMC-B787-A-29-11-02-00B-520A/720A-A, TESTED CORRECT.