I saw it often on my bike repaired and it also happened to lose a pedal arm while I was riding on my bike. A simple preventive remedy for this kind of thing is to tighten the bolt that attaches the pedal arm to an axle times a year with a 14mm socket.
By cons, when your pedal arm has already fallen and you have reinstalled, here's a possible scenario. You walk very proud to have solved a problem my faith very simple and you ride on a beautiful summer day, the wind in your hair, sun on the skin, the birds sing, life is beautiful ... PAF suddenly ..! The pedal arm is cursed again picks up the ground. Of course this happens in the middle of nowhere and you are taken to walk home. The problem is this: If you rode a little bit with the pedal arm debunk, this causes wear in the game that connects to the axle. The corners are rounded off standards and that your neighbor has put bodybuilder all his strength to tighten the bolt is screwed, it will rid itself quietly each time. You should replace this part. Be sure to bring your pedal arm to your local dealer to have the same length, unless you have one leg shorter than that suits you. :) See you
Gerald
