PIPER PA31-350 Navajo Chieftain — Service Bulletins

This document is a service bulletin issued by Kelly Aerospace Power Systems regarding a potential interference issue with the turbocharger turbine exhaust outlet flange on the Piper PA31-350 Navajo Chieftain. It mandates inspection and/or replacement of affected turbocharger turbine housings to prevent exhaust leaks and potential engine damage.

• Inspection and/or replacement of turbocharger turbine housing is mandatory.
• Affected turbocharger part number is P/N 409170-0001.
• Turbocharger turbine housings manufactured between August 25, 2006, and October 12, 2007, are suspect.
• Compliance is required within 10 hours of service or at the next scheduled maintenance.
• The document includes a list of suspect serial numbers for affected turbochargers.
• Inspection must be performed by qualified personnel familiar with turbocharged aircraft.
• Warranty consideration is provided for affected turbine housings.
• Contact Kelly Aerospace for technical support regarding the bulletin.