Final rule · 2026-10855

Special Conditions: Honeywell International Inc., Boeing Model 757-200 Series Airplanes; Electronic System Security Protection From Unauthorized External Access

These special conditions are issued for the Boeing Model 757- 200 series airplanes. This airplane, as modified by Honeywell International Inc (Honeywell), 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 the installation of a digital systems architecture that will allow increased connectivity to and access from external network sources to the airplane's previously isolated electronic assets. 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.