GNRMatt

So, it seems you had about a 7 hour delay due to mechanical issues. You can write in via the AA website and ask for some compensation due to the lengthy delay. Make sure you just stick to the facts. Be specific of the type of compensation you want. Typically, for this, you may get basically 3 possible outcomes. Possibly a small voucher for a future flight for each person on the reservation ($50-$100). You may (most likely) get some miles thrown your way (5-10K). Or, also, you may just get nothing but a cold apology.

In general, for this to be successful in getting anything, keep it short and sweet. They don't want to read a novel.