B777 VNAV Descent page problem
Can someone please shed some light for me. I've seen this on 3 occasions during STARs with multiple AT or ABOVE restrictions with no manually inserted restrictions. While clearly very low on profile the FMC Descent page V/B was showing very high descent FPA angles required to meet the At or Above restriction in magenta while the V/S went up until reaching 9999 (highest value). As I said, no At or At or Below restrictions in the FMC. Aircraft Modes VNAV SPD, and resetting VNAV (cycling waypoint restrictions) did not fix the problem.
Has anyone seen this before and can enlighten me as to what is going on.