As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS LOUD NOISE AND VIBRATION ON RIGHT SIDE OF AIRCRAFT BY ROW 15. *S/D* DUCTS IN AFT OF FORWARD CARGO COMPARTMENT (MIX MANIFOLD AREA) WERE CHECKED, BUT NO DISCREPANCIES WERE FOUND. AIR ON TEST WAS PERFORMED ON RIGHT HAND PACK, AND THERE WAS NO EICAS MESSAGE INDICTING THE RIGHT PACK. AIRCRAFT WENT BACK TO REVENUE SERVICE WITH NO FURTHER INCIDENT.