As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ALT & CABIN ALTITUDE LIGHTS ILLUMINATED. EICAS MESSAGE CABIN ALTITUDE WAS DISPLAYED. UNABLE TO RESTORE CABIN PRESS. USING MANUAL MODE. DESCENDED TO FL 280 LIGHT WENT OUT. OXYGEN WAS USED. AICRAFT CONTINUED TO SCHEDULED ARRIVAL AIPORT. AIRCRAFT WAS GROUNDED BY MAINTENANCE UNTIL REPAIRS WERE MADE. RT PACK TEMP CONTROL VALVE WAS REPLACED IAW B767 AMM 21-51-12. RELAY K50 WAS REPLACED IAW SWPM 20-81-22 AIRCRAFT RETURNED TO SERVICE.