There are now 23 Hawker 4000s in the completion pipeline as Hawker Beechcraft continues function and reliability testing, the last phase before the FAA issues final type approval. While Hawker Beechcraft predecessor Raytheon Aircraft did obtain FAA type certification for the super-midsize jet in November 2006, it came with a catch–the company’s certification tests took so long that the design would have to meet additional, new fuel tank and hydraulic requirements by this coming May. A spokesman said Hawker Beechcraft will start delivering Hawker 4000s “soon.”