Mooney M20C Ranger — Service Bulletins

This document is a service bulletin amendment for the Mooney M20B and M20C aircraft models, specifically addressing issues related to the Marvel-Schebler carburetors. It provides important inspection and maintenance instructions for the carburetors, particularly focusing on the drain plugs and the need for lubrication checks. The bulletin outlines compliance requirements and procedures for both attached and detached carburetors, ensuring that operators maintain safety and performance standards. The document is intended for all outlets servicing these aircraft models and emphasizes the importance of timely inspections and proper maintenance practices to prevent operational issues.

• Carburetors affected: Part No. A10-4953.
• Inspection compliance required within 25 flight hours or 90 days.
• Flush carburetor for 20-30 seconds during inspection.
• Torque specifications: 50-60 in-lbs for 1/8" plugs, 120-144 in-lbs for 1/4" plugs.
• Stamp nameplate with 'AI' to indicate compliance.