Would you purchase Frontier? Would you sell it right now? And what the OEMs are worrying about beyond the 787 battery.

  Frontier Airlines yesterday announced the appointment of Holly Nelson as chief accounting officer and treasurer. She arrives from ATP but prior to joining there, Nelson worked at Virgin America, where she served as senior vice president and chief financial officer.   Now this move could be a real winner for Holly as the separation of Frontier from parent company Republic Airways and its transformation into a LCC could well be given a real boost as Indigo Partners and Anchorage Capital Group are competing to take control of Frontier for a purchase price of around $20m to $50m.   It