An accountancy practice kamagra oral jelly was ist das Jefferies analyst Sandy Morris said sale of some or all of Spirit's wing systems division was possible. BofA Merrill Lynch analysts say the division is underperforming, with about $1.3 billion in revenue in 2013 and margins of 4.5 percent. About $1.3 billion of Spirit's 2013 estimated $6 billion in sales are from wing systems, the analysts said.