Just did my first class two flight 2002 EGLL - LFPG using the class two EHM aircraft Dornier 328-120 for the first time. Every thing was good except the IAS speed hold in AP. Suppose if I enter 280 IAS for AP, and activate the IAS speed hold it simply starts decreasing the speed. Suppose I'm at 300, It'll start decreasing to 280..but it won't stop there (it's supposed to!) it just keeps decreasing the speed. Then I have to turn IAS speed hold off and maintain the speed my self. Any idea what's wrong?
[Off-topic: Also I was just wondering, can I do a same flight twice? Like I did flight 2002 right now, can I do it again and again whenever I want? Or I can fly one flight only once and then only the remaining flights can be done by me?]