When approving ETOPS extensions, the reliability of the propulsion system is the primary focus of the regulators. Central to that is the demonstrated engine inflight shut-down rate (IFSD), which must not exceed specific thresholds.

The partnership between major airlines and regional carriers has long been based on the premise of “seamless service,” although the only thing seamless about it has been a common reservation system and a shared airline International Air Transport Association code. For passengers transferring to a regional airliner from an intercontinental jet, cabin comfort and amenities often defy comparison. But that could be changing, as global carriers vie for the lucrative first and business classes and some coach passengers show a willingness to pay more for greater room in economy.

Paul Scherrer, the airline's managing director, engineering & planning, reports that the carrier rents hangar facilities in Zurich and Geneva, but it has no overhaul shops of its own. It performs light maintenance up to and including A checks, and other tasks such as engine and APU changes. It sources all heavy maintenance.