We speak with Norman Hecht, an aviation consultant with 38 years in the business, 37 of them with a major engine OEM. Norm explains the most important factors in engine selection - there are nuances and airlines frequently bring in consultants to assist even if they have a long term relationship with the OEM. We talk about Qantas and Rolls-Royce and the A330 which is unique in offering engines from all three OEMs.