As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT AFT EQUIPMENT FAN DAMAGED BY FAULTY CHECK VALVE FLAPPER AT STA 815. REMOVED AND REPLACED RT RECIRCULATION AIR FAN IAW B767 AMM. REMOVED & REPLACED RT RECIRCULATION AIR CHECK VALVE. OP CHECK RT RECIRCULATION AIR FAN IAW 767 AMM. OP CHECK RT RECIRC AIR CHECK VALVE.