Bombardier Aerospace has missed its January 31 target for converting a letter of interest (LOI) for “up to” 60 C Series airliners from Lufthansa, leaving the program devoid of orders some seven months after the official launch during last year’s Farnborough Air Show. However, Bombardier and Lufthansa continue to assert that plans remain in place to convert the LOI in due course. Lufthansa remains the only announced customer, but the manufacturer said it has engaged in “promising discussions with a number of airlines worldwide.”