Hi all, I realise the Team are working on SP1 and the aircraft is complex. I have managed to overcome the Freezes without using the Hotfixes just recently. Today I loaded a flight from EGPF-EBBR some 490mls. using the TUTORIAL but deviated from the descent using Vnav and used FLChange as I could manage the speed and FMC alt constraints, I passed the first constraint of 16,000ft and heading for the next still adhereing to the info on the FMC when suddenly the speed tape started increasing from 250knots to 300knots and no warnings given either on EICAS or FMC. Does anyone have some idea what might have caused this. Thanks in advance. richard welsh.

Were you in FMS SPD mode on the FMA at the time?Trevor

Were you in FMS SPD mode on the FMA at the time? Trevor

Yes, I entered the speed of 250 as per the FMC speed requirement. richard welsh.