What was found
PDIS 525 31-61 6962 28JUL19 SEA OPEN U LOGPAGES:2964492 IMMEDIATELY AFTER TAKEOFF, DUS 4,5,6 RED X'D. MASTER WARNING AND MASTER CAUTION AURAL ALERTS-COULD NOT BE SILENCED. ENG OIL #2AMBER X. FO ON AUX RETURNED DUS. WARNINGS COULD NOT BE SILENCED. AFTER LANDING ENG FAILURE LIGHT ILLUMINATED. RELEASED FOR SERVICE PER MEL : 31-61-01-02 CATEGORY : B EXPIRATION : 31JUL19 "MEL 31-61-01-02: DEU 3 - INOP. ENG 3 OIL QTY - CONSIDERED INOPERATIVE. BEFORE EACH BLOCK OUT, SERVICE OIL TANK TO FULL AND RECORD IN AML/EAML." COMPLIED WITH MX ACTION. #2 AND #3 DEU SWAPPED. REF AMM 31-61-02-4. C/7194452 FACT 28JUL19 17:51 LAX REMOVED AND REPLACED #3 DISPLAY ELECTRONICS UNIT IN REF. TO AMM 31-61-02-4.PERFORMED OPS CHECK IN REF. TO AMM 31-61-02-5,OPS CHECKED NORMAL,A/C OK FOR SERVICE.