Special Conditions: Honda Aircraft Company, Inc., HA-420 Airplane; Single-Place Side-Facing Lavatory Seat Dynamic Test

These special conditions are issued for the Honda Aircraft Company, Inc., HA-420 airplane. This airplane will have a novel or unusual design feature associated with a single-place side-facing seat in the lavatory that can be used as a passenger seat during taxi, takeoff, and landing. 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.