FAA Exemption To Allow Citation Longitude Certification Soon Behind the scenes Textron Aviatoin's brand Cessna has been working hard on getting the Citation Longitude ready for Federal Aviation Administration (FAA) certification. "We continue to partner with the FAA as we work toward certification of the Citation Longitude in the third quarter," said Textron Aviation engineering senior vice president Brad Thress. The FAA appears to have given Cessna an exemption -for now- as it relates to certain issues of the flammability of the fuel tanks. Thus allowing them still have the aircraft certified by the next quarter. However, a concrete plan for the issue must be submitted by October 1st. Even so, the current exemption runs to the end of the first month in 2020.