CESSNA 172P SKYHAWK — Service Bulletins

This document is a service bulletin for the Cessna 172 aircraft, specifically detailing the installation of the Skybolt SK2003-42 Gen IV Platemount Conversion Kit. The bulletin addresses issues related to the cowling fastener system, aiming to replace a light-duty fastener system with a heavy-duty alternative. It provides step-by-step instructions for the installation process, including necessary tools and precautions to ensure proper alignment and functionality. The document is intended for maintenance personnel and aircraft owners looking to improve the durability and reliability of their Cessna 172 cowlings. It emphasizes the importance of following the outlined procedures to avoid costly mistakes and ensure compliance with FAA regulations.

• The Skybolt SK2003-42 conversion kit is designed for Cessna 172 aircraft to enhance cowling fastener reliability.
• Installation typically requires 9.5 to 10 hours of labor, depending on the specific aircraft condition.
• Alignment of the engine mounts is critical; deviations greater than 5 degrees can lead to mount failures.
• The allowable gap between the aft cowling skin and fuselage skin is 0.03 to 0.25 inches, with 0.12 inches preferred.
• Proper documentation, including filing Form 337 with the FAA, is required after installation.