Special Conditions: Aerocon Engineering Company, Airbus Model A350-941 Airplane; Forward Lower Lobe Crew Rest Compartment Installation

These special conditions are issued for the Airbus Model A350- 941 airplane. This airplane, as modified by Aerocon Engineering Company (Aerocon), will have a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards for transport category airplanes. This design feature is an installation of a lower lobe crew rest (LLCR) compartment located under the passenger cabin floor in the cargo compartment. 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.