Special Conditions: TTF Aerospace, LLC, Modification to Boeing Model 767-300 Series Airplanes; Pilot Lower Lobe Crew Rest Module

These special conditions are issued for the Boeing Model 767- 300 series airplane. This airplane, as modified by TTF Aerospace, LLC, will have a novel or unusual design features associated with the pilot lower lobe crew rest module (CRM). The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.