sounds like something is bent.
You should be able to fly straight and level and in balance and trim to keep it there in a PA28.
If you trim so you are straight and level and in balance, it sounds like you are then having to use the ailerons to hold the wings level, or perhaps not level, to keep it straight.
If you trim so you are wings level, and straight, then you are not in balance.
Something is wrong if this is happening in a PA28, get it looked at. There may be a tab on the ailerons which can be adjusted on the ground (technically should be done by an engineer) to stop it from rolling when you have wings level and in balance.
Last edited by RTN11; 28th Jul 2013 at 22:06.