Mooney M20M Bravo — Normal Procedures

This document is a service bulletin issued by Hartzell Engine Technologies, specifically addressing issues related to turbocharger center housing rotating assemblies (CHRA) for certain aircraft engines. The bulletin outlines the necessary inspections and cleaning procedures to ensure the safe operation of affected turbochargers. It is crucial for maintenance personnel and aircraft operators to comply with the guidelines provided to prevent potential engine failures due to contamination. The document emphasizes the importance of adhering to the compliance timelines based on the hours of service of the turbocharger and provides detailed instructions for identifying affected parts, performing disassembly, cleaning, and reassembly of the turbocharger. The bulletin is particularly relevant for aircraft utilizing specific turbocharger models, including the Mooney M20M Bravo.

• Affected turbocharger models include those used in the Mooney M20M Bravo.
• Immediate inspection is required for turbochargers with 0-10 hours TIS.
• Turbochargers with 10-50 hours TIS must be inspected within the next 10 hours.
• No action is required for turbochargers with over 50 hours TIS.
• Cleaning and inspection procedures must be performed by qualified personnel.