AD/PA-31/74 Amdt 1 - Hose Assembly - Inspection and Replacement - CANCELLED

This instrument officially cancels an older aviation safety rule (Airworthiness Directive AD/PA-31/74) that applied to Piper PA-31 series aircraft (including Navajo models).

What the original rule required: The 1974 directive mandated a one-time inspection and replacement of main landing gear (MLG) hydraulic hose assemblies. Operators had to complete this work within 25 flight hours after December 1978, following specific manufacturer guidelines (Piper Service Bulletin No. 629).

What this document does: It permanently removes that inspection requirement as of 31 July 2008. The Civil Aviation Safety Authority has cancelled the rule because all affected aircraft have already been modified, meaning the safety issue has been resolved across the entire fleet.

Why this matters: Aircraft owners and maintenance engineers no longer need to track or comply with this specific directive. However, they must still maintain records proving the original modification was completed.