CESSNA 175 — Systems Description

This document provides Instructions for Continued Airworthiness for McFarlane Aviation, Inc. PMA replacement Cabin Door Hinge Assemblies, Hinge Halves, and Reusable Cabin Door Hinge Pins. It is applicable to various Cessna single-engine aircraft, specifically the Cessna Model Series 172 and 175. The document outlines the installation, removal, and maintenance procedures for these parts, ensuring that they meet airworthiness standards. It includes detailed descriptions of the hinge systems, part numbers, and installation instructions, as well as troubleshooting tips and inspection requirements for maintaining the cabin door hinges and pins.

• Cessna Model Series 172 and 175 aircraft have two cabin doors with hinge assemblies.
• McFarlane provides reusable hinge pins that can be removed and reinstalled, unlike original Cessna pins.
• Hinge assemblies consist of two halves and a hinge pin; the forward half attaches to the fuselage, and the aft half attaches to the door.
• Inspect hinges and pins for damage and ensure they are properly lubricated before use.
• Replace both upper and lower hinges simultaneously for best results.