Maricopa Community Colleges  AMT284   19886-19935 
Official Course Description: MCCCD Approval: 09/21/93
AMT284 19886-19935 L+L 6 Credit(s) 12 Period(s)
Aircraft Fluid Power Systems
Fluid power system concepts including pressure, force, area, volume, flow and speed. Fluids, seals, hoses, tubing, connections, and component identification, function, inspection, installation and overhaul. Hydraulic, pneumatic, and landing gear system operation, inspection and troubleshooting. Prerequisites: AMT180.
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MCCCD Official Course Competencies:
 
AMT284   19886-19935 Aircraft Fluid Power Systems
1. Fabricate and install rigid and flexible fluid lines and fittings. (I)
2. Inspect, check, service, and repair landing gear, retraction systems, shock struts, brakes, wheels, tires, and steering systems. (II)
3. Repair hydraulic and pneumatic power systems components. (III)
4. Identify and select hydraulic fluids. (IV)
5. Inspect, troubleshoot, and repair hydraulic and pneumatic power systems. (IV)
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MCCCD Official Course Outline:
 
AMT284   19886-19935 Aircraft Fluid Power Systems
    I. Rigid and Flexible Lines
        A. Fluid lines, rigid
          1. Materials
          2. Construction
          3. Identification, selection, inspection of aircraft tubing
          4. Operations on aircraft tubing
          5. Fittings used to terminate aircraft tubing
          6. Installation of tubing, bend radius and support
        B. Fluid lines: flexible
          1. Purpose, desirable characteristics
          2. Construction size
          3. Materials
          4. Identification, selection, inspection of aircraft hose
          5. Operations on aircraft hose
          6. Removal and installation of hose
        C. Fittings of fluid connections
          1. Purpose, desirable characteristics - seal, removable, reliable
          2. Construction
          3. Materials
          4. Sealing methods
          5. Identification, selection, inspection of aircraft fittings
          6. Installation of fittings - in components, on fluid lines, positioning and torque
      II. Landing Gear Inspection and Repair
          A. Landing gear systems (Basic)
            1. Loads on landing gear - weight, momentum
            2. Landing gear design - fixed and retractable
            3. Shock absorbing
            4. Special landing gear design
            5. Landing gear configurations - conventional tricycle, fuselage and wingtip
            6. Identification of landing gear components
            7. Inspection, operation, servicing and alignment of retractable gear with air oil shock strut
            8. Removal, installation, inspection and servicing of elastic shock cord type gear
            9. Removal, installation, inspection, servicing, and alignment of spring steel conventional gear
          B. Wheels, tires, and bearings
            1. Classes of tires
            2. Sizes of wheels, tires
            3. Removal, installation, inspection, repair and servicing of tires and tubes
            4. Types of bearings, description of bearings
            5. Removal, cleaning, inspection, and installation of wheels and bearings
            6. Wheel bearing lubricants
          C. Aircraft brakes - unboosted
            1. Types of brakes - drum, disc
            2. Brake actuation
            3. Brake lining materials
            4. Hydraulic brake system components
            5. Removal, inspection, repair, servicing, installation of hydraulic brake systems and components
          D. Aircraft brakes - boosted
            1. Boosted brake system components
            2. Metering valve operation
            3. Debooster cylinder operation
            4. Anti-skid components and operation
            5. Removal, inspection, servicing, installation of power boosted, multiple disc brakes
        III. Hydraulic and Pneumatic Component Repair
            A. Aircraft hydraulic Pumps
              1. Pump basics - pressure vs resistance to flow
              2. Pump types - positive displacements
              3. Fixed and variable delivery pumps, variable delivery methods
              4. Pump failures
              5. Pump overhaul procedures
              6. Disassembly, inspection, parts identification and reassembly of piston and gear pumps
            B. Regulators
              1. Pressure regulation through flow diversion
              2. Single, dual, and triple-stage pressure regulators
              3. Pump unloading
              4. Troubleshooting aircraft pressure regulators
            C. Aircraft hydraulic reservoirs
              1. Design features
              2. Types of pressurization
              3. Servicing hydraulic reservoirs
            D. Aircraft hydraulic filters
              1. Filter construction
              2. Element types and ratings
              3. Filter features
              4. Filter placement
              5. Filter servicing
            E. Aircraft hydraulic accumulators
              1. Use of accumulators
              2. Accumulator design
              3. Accumulator features
              4. Servicing of accumulators
              5. Trouble-shooting accumulators using flight deck system indicators
            F. Control valves
              1. Use of control valves
              2. Valve construction
              3. Types of valves
              4. Valves in a system
              5. Mechanical feedback to control valves
              6. Summing levers and floating actuators
              7. Valve operation and troubleshooting
              8. Electro-hydraulic servo valve
            G. Actuators
              1. Actuator principles
              2. Resolution of forces in levers, bell cranks and quadrants
              3. Actuator construction, one way, two way, linear rotary, port arrangements, seals, and wipers, materials
              4. Disassembly, seal replacement, inspection and reassembly of actuators
              5. Trouble-shooting actuators
            H. Miscellaneous hydraulic components
              1. Check valves
              2. Hydraulic fuse
              3. Oriface restrictions
              4. One-way restrictions
              5. Pressure gauge
              6. Relief valves
              7. Purge valves
              8. Pressure reducing valves
              9. Priority valve
              10. Sequence valves
          IV. Hydraulic Fluids and Hydraulic and Pneumatic Power Systems
              A. Fluid power basics
                1. Types of fluid power
                2. Mass, weight, density, specific gravity, force and work definitions
                3. Pressure, force, area relationships
                4. Volume, flow, speed relationships
                5. Power, work, energy
                6. Pressure drop, flow resistance relationships
                7. Compressibility, head, hydraulic lock definitions
              B. Fluids
                1. Types of fluids: gas, liquid
                2. Fluid properties
                3. Aircraft fluids
              C. Seals
                1. Types of seals: gasket, packing
                2. Seal design
                3. Seal materials
                4. Seal identification and usage
                5. Seal installation, removal, storage, inspection, special tools
                6. Seal accessories: back-up rings, forming block, wipers, universal nuts
              D. Hydraulic systems
                1. Demand systems
                2. Full-time systems
                3. Multiple systems
              E. Pneumatic systems
                1. Pneumatic differences
                2. Pneumatic power system examples
                3. Pneumatic power sources
                4. Uses of pneumatic power
                5. Trouble-shooting pneumatic power system
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