B787-900
Flight Crew Air Transport Pilot (ATP)
Confusion; Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew FLC Overrode Automation
Procedure; Aircraft
Random route over the Atlantic. Using SLOP (Strategic Lateral Offset Procedure); 1 mile right. After midpoint check and before N58W050; I performed a wind update. After wind update was executed; we noticed N58W050 waypoint was white on the navigation display and had dropped from the FMC. Our follow-on waypoint; N60W040 was now the active waypoint. Captain attempted to reload N58W50 as the active waypoint; but the FMC kicked it out. Captain used heading select to stay on track and fly over N58W050. Once reaching N58W050 he selected direct N60W040 and we proceeded on track.There is an [industry] posting referencing FMC anomaly BP3A that Boeing has not resolved. This anomaly is very similar to what we experienced. Upon arrival; Captain entered anomaly in the logbook. Until this anomaly is corrected by Boeing; I suggest not updating winds while on a track or random route over the Atlantic.
[Report narrative contained no additional information.]
B787 flight crew reported an anomaly with the navigation function of the FMC during an update of the winds on an oceanic route.