As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - SHORTLY AFTER TAKEOFF DURING FLAP RETRACTION A VIBRATION AND RUMBLE SOUND STARTED FOLLOWED BY RIGHT ENGINE HYDRAULIC PUMP EICAS MESSSAGE AND PRESS LIGHT ON. RETURNED LAX WITHOUT INCIDENT. REPLACED ENGINE PUMP PRESS SWITCH S10541. ALSO PERFORMED AIRFRAME VIBRATION CONDITIONAL INSPECTION PROCEDURE A ITEM 18. SYSTEM GROUND CHECKED NORMAL OPERATION.