The General Aviation Airport Coalition has posted a petition on the White House website protesting a proposed user fee. If the petition receives 25,000 signatures by May 16, the government will have to respond on how it determined that the proposed $100 fee is a fair amount. "In the interest of transparency and in order to maintain a healthy aviation industry, we request that the White House explain how it calculated that a $100 per flight segment user fee is a fair contribution to fund FAA," the petition says.