As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT OIL PRESS INF FLUCTUATES INTO RED REGION DURING TAXI AS LOW AS 6 PSI. INFORMED BY CREW THAT PRESS IND FLUCTUATED TWICE AND RECOVERED NORMAL. CONTACTED MCC AND INFORMED OF 1 PREV W/U ON 20OCT. INSPECTED AND CLEANED CONNECTORS ON PRESS SW AND XMTR AND CONNECTOR ON FIREWALL D4198P. RAN RT ENG ALL PARA NML. MCC SET UP TO REPLACE XMTR AS PRECAUTION AT NEXT MTC STATION. ETOPS CATEGORY 'E': PROBLEMS WITH SYSTEMS CRITICAL TO ETOPS