In late 2004 or early 2005, had an AB blow out shortly after t/o. and then in late 2004 had smoke in the cockpit. Smoke was reported to be coming from the ext light panel. Some how a CB had been tripped and was up against some wafer stacks. The wafer stacks only allowed the CB to pop about half way up which caused a power surge to the panel thus frying it. On that same trip we had to change the right speed brake assembly, right ventril fin, and left MLG tire.