The FAA has issued a final notice of special conditions for some Learjet models. These conditions are issued for the Learjet Model 24/25 Series airplanes, modified by Avcon Industries Inc. The FAA claims these modified airplanes will have novel and unusual design features when compared to the state of technology envisioned in the airworthiness standards for transport category airplanes. The modification incorporates the installation of dual Innovative Solutions and Support Inc., Air Data Display Units, and a single Innovative Solutions and Support Inc., Analog Interface Unit that performs critical functions. The FAA says the applicable airworthiness regulations do not contain adequate or appropriate safety standards for the protection of these systems from the effects of high-intensity radiated fields (HIRF).
The FAA has published a Notice Of Proposed Rulemaking (NPRM) for the Falcon 900EX. This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Dassault Model Mystere- Falcon 900 and Falcon 900EX series airplanes. This proposal would require replacement of certain self-adhering soundproofing mats under the passenger consoles in the cabin, which are not sufficiently fire-retardant, with mats that are not self-adhering and are sufficiently fire-retardant. The FAA claims this action is necessary to prevent an uncontrolled fire in the cabin due to self-adhering soundproofing mats under the passenger consoles in the cabin, which are not sufficiently fire-retardant. The agency says is action is intended to address the identified unsafe condition. Public comments must be received by April 2, 2003.