As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LHR INFLIGHT MXP-JFK CREW REPORTED CABIN PRESS CONTROLLER 2 FAILED IN AUTO WITH CABIN PRESS CONTROLLER 1 AUTO ON MEL. FLIGHT DIVERTED LHR LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED RT FLOW CONTROL & SHUT-OFF VLV. SYS GND CHECKED NORMAL OPERATION CLOSED.