Mad (Flt) Scientist..Thats a reasonable reply so if you and your listeners dont mind I would like to bring up the center of gravity on the Q400 then I will keep quiet.
IF there are 10 windows forward of the wings which could equate to 40 passengers each sitting 4 abreast AND if each passenger weighs 180 lbs the weight forward of the wings is 7200 lbs plus crew and engines lavatory/water. The plane is nose heavy.
In short I request someone to inspect the cables for the trim tabs on the elevators. I bet those tabs are used constantly when in flight to keep the nose up (trim the plane). Inspect the tension on those cables and check the turnbuckles. This craft is nose heavy and those cables can and do stretch. If theres no trim tabs--well there you have it.007