EASA Regulations for Israel Aerospace Industries CAA Israel STC SA151

Potential of arcing, fire and/or loss of crew oxygen supply due to insufficient clearances between electrical wiring and flexible oxygen hose

Airworthiness Directive AD ISR I-35-26-01-01 issued by the Civil Aviation Authority of Israel addresses a safety issue on Boeing 747-400 freighter aircraft converted under CAAI STC SA-151 or SA-152 and their validated equivalents. The directive highlights the risk of arcing, fire, and loss of crew oxygen supply caused by insufficient clearance between electrical wiring and the flexible crew oxygen hose. It requires inspection and corrective action to prevent potential hazards related to chafing and damage to oxygen hoses and electrical wiring.