You will get all of the perks of a Silver Elite (1 free checked bag, early boarding, bonus miles, a shot at free upgrades) from day one and if you fly 7,500 miles or 10 segments (only US Airways/US Airways Express metal counts) in 90 days you will keep Silver Preferred until Feb 28, 2015.
To enter, leave a comment below and I will use a random number generator to select a winner. I have several months before I need to nominate someone so if the winner wants me to hold onto it until they know they can do the travel to keep it that is fine with me. Also, if you currently are preferred you cannot accept this trial, but since this is for the lowest level anyway it makes little difference.
Good Luck! Contest closes August 22, 2013 at 10 am Eastern