AD/DH 89/3 - Interplane Strut - Inspection - CANCELLED

What this does This document officially cancels an old aircraft safety rule. Specifically, it cancels Airworthiness Directive (AD) DH 89/3, which previously required owners of DH 89 Dragon Rapide aircraft to inspect the interplane struts (the structural supports connecting the upper and lower wings of this vintage biplane).

Why it matters The Civil Aviation Safety Authority (CASA) — Australia's aviation safety regulator — regularly reviews safety directives to remove requirements that are no longer necessary. This cancellation acknowledges that the inspection requirement (originally issued before 1968) has been satisfied by all affected aircraft over the preceding 40 years.

Who is affected Owners and operators of DH 89 Dragon Rapide series aeroplanes, a twin-engine biplane design from the 1930s. In practice, this is largely administrative housekeeping, as compliance would have been achieved decades ago.