after 6 years on the 146/RJ 100 / 85 flaps are very big and powerful and that`s why its got so many flap problems. You have flap computers that give low rate flaps at the drop of a hat with any problems, i think any driver knows the ground reset procedure off by heart! and other problems and the safety lanes kick in to lock flaps in position to prevent asymmetric flap as this will kill you!. The RJ had a better drive shaft than the 146 to stop it breaking if you made a flap reversal selection but still retained the same safety system, with flap fail you had hyd safety brakes activate. With any flap down reduced flap landing not a problem but flapless was very fast and expect to have brake overheat / fire. You needed a very long runway at high weights. Turb use to "re rack" the flap computers and cause problems. also incorrect selection, not being positive with what you wanted also created a flap fault. Faulty sensors on flaps or selection lever would generate failures also electrical spikes would give you a flap fault. Its one of those RJ things!. Just like the air system! lots of dings to keep you awake!. May find that the start of winter ops is causing problems, liberal use of De-ice in the wrong places often causes problems.