When developing its flagship CSeries jet, Bombardier focused on the 100-150 seat plane segment, believing it would meet new demand for fuel-efficient jets. Ample demand never materialized. At last summer's Paris Air Show, a major source of customer orders for most jet manufacturers, the company left without a single CSeries order. Horizon Airlines, the regional arm of Alaska Airlines, recently ordered 30 Embraer E175 aircraft, a direct competitor to Bombardier's CSeries jet. Earlier this year, United Airlines agreed to buy 40 small planes from Boeing, a $3.2 billion deal that Bombardier had been vying for. Even some existing orders are in peril; Ilyushin Finance Co., a Russian company, is re-evaluating its order because it's now unable to secure financing due to economic sanctions.