Why is "AC 25.1309-1" trending?
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- Date: 2026-03-07 18:19:28
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Wikipedia Overview
AC 25.1309–1 is an FAA Advisory Circular (AC) that identifies acceptable means for showing compliance with the airworthiness requirements of § 25.1309 of the Federal Aviation Regulations, which requires that civil aviation equipment, systems, and installations "perform their intended function under foreseeable operating conditions." The present Revision B was released in August 2024. AC 25.1309–1 establishes the principle that the more severe the hazard resulting from a system or equipment failure, the less likely that failure must be. Catastrophic failures must be extremely improbable.
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