Piper PA-25 Pawnee — Service Bulletins

This service bulletin addresses mandatory inspections for the Piper PA-25, PA-25-235, and PA-25-260 aircraft models, focusing on the detection of corrosion and cracks in the forward and aft wing spars. It highlights the importance of routine inspections due to severe corrosion found in these areas. The document outlines the necessary actions to be taken, compliance times, and detailed inspection procedures to ensure the structural integrity of the aircraft. It serves as a critical reference for maintenance personnel and aircraft operators to maintain safety and compliance with airworthiness standards.

• Initial inspection required at 500 hours or 5 years, whichever comes first.
• Repetitive inspections every 100 hours or 12 months.
• Corrosion detected on wing spars must be addressed immediately.
• Use rust inhibitor LPS3 for protection after inspections.
• Contact LAVIASA for repairs if corrosion or cracks are found.