The lengthy process of winding up bankrupt US budget carrier Spirit Airlines continues to rumble along, with AerCap haggling a deal with US giant Honeywell over aircraft parts in dispute in the collapse of the airline. The Irish lessor had been at loggerheads with Honeywell Aerospace in a New York bankruptcy court over spare aeroplane parts where the title of ownership was unclear. Honeywell was demanding the return of $24 million of spare parts. This includes several auxiliary power units (APUs) that were installed on planes in Spirit’s fleet, including aircraft owned by AerCap. The US company argued that the…