Special Conditions: TTF Aerospace, LLC, Modification to Boeing Model 767-400 Series Airplanes; Aft Lower-Lobe Crew-Rest Module (CRM)

These special conditions are issued for Boeing Model 767-400 series airplanes. These airplanes, modified by TTF Aerospace, LLC (TTF), will have a novel or unusual design feature associated with an aft, 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.