AD/CF34/13 Amdt 1 - Uncontained Fan Disk Failure - CANCELLED

What this does This document officially cancels (revokes) a previous safety rule — Airworthiness Directive AD/CF34/13 Amendment 1 — that applied to General Electric CF34 aircraft engines.

Background Airworthiness Directives (ADs) are legally binding safety rules that require aircraft owners to fix unsafe conditions. The original rule required specific maintenance to prevent "uncontained fan disk failures" (where engine parts break apart and fly outward).

Why it matters The Australian rule is no longer needed because the United States aviation safety regulator (FAA) issued a new directive in January 2010 that supersedes the old requirements. The cancellation takes effect on 11 February 2010.

Who is affected Operators of aircraft with GE CF34 series engines are no longer required to comply with the specific requirements of the cancelled directive, provided they follow the new FAA directive instead.