AVMT 103 - General Group III: Cleaning and Corrosion Control / Aircraft Materials, Hardware and Processes / Fluid Lines and Fittings:

(3 credits)

Lecture:

Aircraft cleaning procedures. Corrosion theory and causation. Types and effects of corrosion. Corrosion prone areas in aircraft. Corrosion identification and inspection. Improper use of cleaners on aluminum or composite materials. Identification of materials and processes to be used for cleaning or corrosion treatment on a given part or structure to prevent further damage. Corrosion preventive maintenance procedures.

Corrosion removal and treatment procedures. Corrosion preventive compounds. Selection of optimal CPC and frequency of treatment. Dissimilar metals causing accelerated corrosion and role of protective barriers to mitigate this risk. Conversion coatings. Materials used for protection of airframe structures. Identification of materials and processes to be used for cleaning or corrosion treatment on a given part or structure to prevent further damage. SDS PPE instructions for products during removal and treatment of corrosion. Working with flammable chemicals. Disposal of chemicals and waste materials. Use of high pressure application equipment. Materials used for protection of airframe structures. Primer materials. Topcoat materials. Surface preparation for a desired finishing materials. Effect of ambient conditions on finishing materials. Effects of improper surface preparation on finishing materials. Regulatory requirements for replacing identification, registration markings, and placards. Inspection of aircraft finishes. Safety practices/precautions when using finishing materials. Finishing materials application techniques and practices. Control surface balance considerations after refinishing. Health concerns when using paints, solvents, finishing materials, and processes. Ventilation. Use of PPE when working with paints and solvents. Application of finishing materials.

Lab:

Perform a portion of an aircraft corrosion inspection. Inspect finishes and identify defects. Inspect an aircraft compartment for corrosion. Identify, select, and use aircraft corrosion prevention/cleaning materials. Apply corrosion prevention/coating materials. Apply etch solution and conversion coating. Identify finishing materials and appropriate thinners. Lay out and mask a surface in preparation for painting. Prepare metal surface for painting. Determine what paint system can be used on a given aircraft. Identify types of protective finishes. Prepare composite surface for painting. Determine location and size requirements for aircraft registration numbers. Identify procedures to clean and protect plastics.

This class consists of 3 lessons and 6 labs.

Aircraft Materials, Hardware and Processes

Lecture:

Materials commonly used in aircraft and their general application. Heat treatment and metal working processes. Forces placed on aircraft materials. Suitability and compatibility of materials and hardware used for maintenance. Identification markings on materials and hardware. Hardware commonly used in aircraft. Safety wire and safety clips requirements and techniques. Torquing tools, principles, and procedures. Suitability and compatibility of materials and hardware used for maintenance. Relationship between torque and fastener preload. Identification markings on materials and hardware. Improper torque. Used hardware or suspected unapproved parts. Torquing techniques on critical, highly stressed fasteners. Precision measurement tools, principles, and procedures. Use of personal protective equipment. Soldering preparation, types of solder, and flux usage. Characteristics of acceptable welds. Characteristics of unacceptable welds. Procedures for weld repairs. Use of personal protective equipment.

Lab:

Install safety wire on nuts, bolts, and turnbuckles. Determine and properly torque aircraft hardware. Identify aircraft materials and hardware based on manufacturer’s markings. Select and install aircraft bolts. Install safety wire on nuts, bolts, and turnbuckles. Identify aircraft control cable components. Fabricate a cable assembly using a swaged-end fitting. Make precision measurements with an instrument that has a Vernier scale. Check the concentricity of a shaft. Check for proper calibration of a micrometer. Inspect and check welds. Identify aircraft materials and hardware based on manufacturer’s markings. Select the correct aluminum alloy for a structural repair. Identify rivets by physical characteristics. Determine suitability of materials for aircraft repairs. Distinguish between heat-treated and non-heat-treated aluminum alloys.

This class consists of 4 lessons and 4 labs.

Fluid Lines and Fittings

Lecture:

Tubing and hose materials. Applications, sizes, and fittings. Rigid line or flexible hose material identification. Rigid line fabrication, installation and inspection techniques/practices. Importance of using a torque wrench when securing fluid hose and line fittings. Use of torque seal or similar witness techniques after installing critical fluid hose and line fittings. System configuration prior to and during maintenance. Use of required safety equipment. Hazardous fluids. High pressure fluid systems. A loosened fitting or a hose that has moved out of position. Use of tools while applying torque to a fluid line. Tubing and hose materials. Applications, sizes, and fittings. Flexible hose fabrication, installation, and inspection techniques/practices. Importance of using a torque wrench when securing fluid hose and line fittings. Use of torque seal or similar witness techniques after installing critical fluid hose and line fittings. System configuration prior to and during maintenance. Use of required safety equipment. Hazardous fluids. High pressure fluid systems. A twisted hose. A loosened fitting or a hose that has moved out of position. Use of tools while applying torque to a fluid line.

Lab:

Fabricate a rigid line with a flare and a bend. Install an aircraft rigid line. Fabricate a flareless-fitting tube connection. Install an aircraft flexible hose inspection. Fabricate a flexible hose. Perform a rigid line or flexible hose inspection. Identify installation and security requirements for rigid lines and flexible hoses. Identify fluid lines, pneumatic lines, and fittings.

This class consists of 2 lessons and 3 labs.