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The Federal Aviation Administration (FAA) has issued special conditions for Universal Avionics to add a new digital systems architecture to specific airplanes. This change involves allowing more connections and access from external network sources like operator networks and the internet to the airplane's electronic systems, which were previously isolated. These conditions are necessary because current airworthiness standards do not address the security risks posed by this increased connectivity, such as potential unauthorized access and cyber threats. The special conditions outline safety measures to ensure that these risks are managed, maintain the safety of the aircraft, and apply only to the specific airplane models affected by these changes.

The Federal Aviation Administration (FAA) issued special conditions for Airbus Models A321 neo ACF and A321 neo XLR airplanes due to their unique design, which includes oblique (side-facing) seats potentially equipped with 3-point restraint systems with pretensioners. These seats are installed at angles between 18 and 45 degrees from the aircraft's centerline, raising safety concerns not covered by existing airworthiness standards. The special conditions aim to ensure a safety level equivalent to traditional forward and aft-facing seats by addressing elements like neck and spine protection, pretensioner functioning in different scenarios, and ensuring the system's effectiveness throughout a flight. Airbus S.A.S. must comply with these conditions for type certification of the new aircraft models.