As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION/DECLARED EMERGENCY----------------------------------------------------------CLIMBING THROUGH FL360, HEAR A LOUD BANGING NOISE BEHIND COCKPIT DOOR AND REPORTED IN FORWARD CABIN AREA BY FLT ATTND. NO ABNORMAL INDICATIONS ON ENGINES OR PRESSURIZATION NOTED. PASSING FL380, / CABIN ALTITUDE HORN AND LIGHTS ILLUMINATED. INITIATED EMERGENCY DESCENT. CABIN ALTITUDE DID NOT EXCEED 11,000'. / R&R #1 CABIN PRESSURE CONTROLLER PER AMM.