As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INBOUND CREW REPORTED MAIN PASSENGER DOOR 4L SLIDE-RAFT INFLATION SYSTEM PRESSURE GAUGE INDICATED OUT OF GREEN BAND ON ARRIVAL. INITIALLY PROBLEM DEFERRED WITH SEATS BLOCKED OUT PER MEL PROCEDURES. LATER SLIDE AND BOTTLE WERE REPLACED IN HKG.