AVMT 201 - Airframe Group I: Landing Gear Systems / Hydraulic and Pneumatic Systems

(2 credits)

Lecture:

Fixed and retractable landing gear systems. Fixed and retractable landing gear components. Landing gear strut servicing/lubrication. Inspection of bungee and spring steel landing gear systems. Steering systems. Landing

gear position and warning system inspection, check, and servicing. Landing gear and tire and wheel safety and inspection. Alternative landing gear systems. Landing gear and tire and wheel practices/precautions. Use of aircraft jacks. High pressure fluid and gasses. Storage and handling of hydraulic fluids. High pressure strut or system disassembly. Operation of retractable landing gear systems around personnel. Wheel, brake, and tire construction. Tire storage, care, and servicing. Landing gear and tire and wheel safety and inspection. Brake assembly servicing and inspection. Antiskid system components and operation. Wheel, brake, and tire construction. Brake actuating systems. High pressure fluid and gasses.

Lab:

Inspect and service landing gear. Jack aircraft (**perform in project 3 if using Avotek AL45 trainer here**). Troubleshoot a landing gear retraction check. Identify landing gear position and warning system components. Troubleshoot landing gear position and warning systems. Inspect and repair landing gear position indication system. Adjust the operation of a landing gear warning system. Remove, install, and adjust a landing gear down lock switch. Inspect wheels, brakes, bearings, and tires. Remove and replace brake linings. Bleed air from a hydraulic brake system. Troubleshoot hydraulic brake systems. Remove, inspect, and install a wheel brake assembly. Replace master brake cylinder packings seals. Inspect a brake for serviceability. Jack aircraft (**perform here if using systems trainer in project 1**). Inspect wheels, brakes, bearings, and tires. Inspect a tire for defects. Locate tire storage practices. Inspect, check, and service an antiskid system. Locate and explain procedures for checking operation of an antiskid warning system. Locate and explain troubleshooting procedures for an antiskid system. Service a nose wheel shimmy damper. Inspect nose wheel steering system for proper adjustment. Troubleshoot aircraft steering system. Troubleshoot nose wheel shimmy. Inspect and service landing gear. Service landing gear air/oil shock strut. Replace air/oil shock strut air valve. Troubleshoot an air/oil shock strut. Locate and explain the process for checking landing gear alignment. Inspect tube landing gear for damage.

This class consists of 3 lessons and 6 labs.

Hydraulic and Pneumatic Systems

Lecture:

Hydraulic systems components and fluids. Hydraulic systems servicing requirements. Types of hydraulic/pneumatic seals and fluid/seal compatibility. Hoses, lines, and fittings. Storage and handling of hydraulic fluids. Cross contamination of hydraulic fluids. Compatibility between hydraulic seals and hydraulic fluids. Hydraulic systems components and fluids. Hydraulic system operation. Hydraulic systems servicing requirements. Hydraulic system inspection, check, servicing, and troubleshooting. Servicing, function, and operation of accumulators. Pressure regulators, restrictors, and valves. Filter maintenance procedures. Relieving system pressure prior to system servicing or disassembly. High pressure gasses and fluids. Pneumatic system types and componentsK6. Pneumatic system servicing requirements.

Lab:

Identify different types of hydraulic fluids. Identify different packing seals. Install seals and backup rings in a hydraulic component. Service a hydraulic system reservoir. Purge air from a hydraulic system. Inspect a hydraulic or pneumatic system for leaks. Locate and explain hydraulic fluid servicing instructions and identify/select fluid for a given aircraft. Locate installation procedures for a seal, backup ring, or gasket. Remove and install a selector valve. Check a pressure regulator and adjust as necessary. Remove, clean, inspect, and install a hydraulic system filter. Service a hydraulic system accumulator. Remove, install, and perform an operational check of a hydraulic pump. Remove and install a system pressure relief valve. Troubleshoot a hydraulic or pneumatic system for leaks. Locate procedures for checking pneumatic/bleed air overheat warning systems. Inspect a hydraulic or pneumatic system for leaks(** optional -requires the Avotek AS86 Trainer).

This class consists of 3 lessons and 3 labs.