Piper PA-28 Warrior — Airworthiness Directives

This document is an Airworthiness Directive (AAD) concerning the Piper PA-28-161 Cherokee Warrior, specifically addressing issues related to the main landing gear's lower torque link bolt. The directive outlines the circumstances of an incident involving the aircraft, where a failure of the lower torque link bolt led to a landing gear malfunction. The report includes findings from a metallurgical examination of the failed components, recommendations for improved inspection procedures, and a discussion on the implications of recent regulatory changes regarding airworthiness oversight. It serves as a critical reference for maintenance organizations and regulatory authorities to ensure the continued safety of the PA-28 series aircraft.

• The incident involved a Piper PA-28-161 Cherokee Warrior during a training flight on October 28, 2003.
• The right main landing gear failed due to a broken lower torque link bolt, leading to a veering off the runway.
• The bolt failure was attributed to fatigue and corrosion, with inadequate lubrication noted as a contributing factor.
• Inspection of the lower torque link bolt is recommended every 100 flying hours, with lubrication every 50 hours.
• The document recommends that the FAA and EASA implement improved inspection procedures for the lower torque link bolt.