nearly one year later (june 2009), 96% of billable materials had been allocated, with the company settling on various companies for remaining components and systems: shenyang aircraft corporation for the centre fuselage; zodiac aerospace for the interiors; parker hannifin for the flight control, fuel and hydraulics systems; liebherr aerospace for the air management system; and united technologies corporation for the air data system, flap and slat actuation systems, and engine nacelles.