AD/CHA/4 - Fuel Lines in Engine Compartment - CANCELLED

This document cancels an obsolete aviation safety rule for specific light aircraft.

What it does

• Revokes Airworthiness Directive AD/CHA/4, which mandated that owners of American Champion, Aeronca and Bellanca series aeroplanes replace aluminium fuel lines with fire-resistant assemblies in the engine compartment.

Why it matters

• The original directive achieved its safety purpose long ago, with all affected aircraft required to comply by 1971.
• This cancellation formally removes the spent rule from the books, confirming that owners no longer have a legal obligation to perform this specific modification.

Who it affects

• Owners and maintainers of American Champion (including Aeronca and Bellanca) series aircraft. While these operators have been complying with this rule for decades, this document officially ends the requirement.