Piper PA-31 Navajo Chieftain — Airworthiness Directives

This Airworthiness Directive (AD) pertains to the Piper PA-31 series aeroplanes, specifically addressing safety concerns related to the wing spar splice plate in the PA31-350 Chieftain models. The directive mandates the replacement of the main wing spar splice plate and outlines the inspection requirements for any signs of damage such as fretting, corrosion, or cracks. The AD is issued by the Civil Aviation Safety Authority (CASA) and is effective from October 25, 2019. It is crucial for maintaining the airworthiness of the affected aircraft and ensuring safety in operations. Compliance with this directive is necessary for all operators of the specified models to prevent potential structural failures due to fatigue cracking.

• Replace the main wing spar splice plate as per Piper Service Bulletin 1003.
• Inspect the removed splice plate for fretting, corrosion, or cracks.
• Report any defects found in the splice plate to CASA.
• Compliance is required upon reaching 13,000 hours TIS or 2,000 hours after the last inspection, whichever is later.
• This AD is effective from October 25, 2019.