What was found
AT THE ARRIVAL OF THE ACFT THE PILOT REPORTED ENG 1 BEARING 4 OIL SYS HIGH PRESS. CONSEQUENTLY, THE ACFT WAS DECLARED AOG FOR MX. IAW TSM 79-20-00-810-809A, BEARING NR 4 SCAVENGE VLV ON ENG 1 WAS REPLACED IAW AMM & ALL REQUIRED OPERATIONAL TEST PERFORMED WITH NOT FAILURE. AS PRECAUTIONARY ACTION, EIU WAS REPLACED IAW AMM & REQUIRED TEST PERFORMED WITH NOT FAILURE. THE ACFT WAS RETURNED TO SERVICE AFTER THE DESCRIBED MX ACTIONS.