As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE A LOUD RUMBLING WAS HEARD THROUGH THE PACK SYSTEM AND AN ODOR WAS NOTICED COMING THROUGH THE VENTS. CONDITIONAL INSPECTION WAS PERFORMED IAW MM 05-51-56 AND IT WAS CONFIRMED THERE IS A BAD PACK 1 ACM. PACK 1 WAS DEACTIVATED AND DEFERRED IAW MEL 21-51-1.