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Elements and Performance Criteria

  1. Select and lay out schematically aircraft mechanical systems
  2. Select and lay out schematically aircraft hydraulic systems
  3. Select and lay out schematically aircraft pneumatic systems
  4. Select and lay out schematically aircraft fuel storage and distribution systems
  5. Set up and operate a simple hydraulic system

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

Mechanical system applications include:

Flight controls

Flap operation

Nose wheel steering

Landing gear door operation

Entrance door mechanisms

Components of mechanical systems include:

Cables

Chains

Sprockets

Pulleys

Fairleads

Cable tensioners

Gearboxes

Screwjacks

Rods

Universal joints

Constant velocity joints

Clutches

Bearings and bushes

Hydraulic system applications include:

Flight controls

Flap and spoiler operation

Landing gear retraction and extension

Brakes (including anti-skid)

Nose wheel steering

Shimmy damping

Door operation

Components of hydraulic systems include:

Pumps

Plumbing

Valves (manual and electrically operated)

Actuators

Motors

Check valves

Pressure gauges (direct reading and electrical)

Electrical control circuit micro switches

Reservoirs

Accumulators

Filters

Pneumatic system applications include:

Landing gear retraction and extension

Pneudraulic emergency systems for landing gear extension and brakes

Engine bleed air

Engine starting

Anti-icing

De-icing

Pressurisation

Air cycle air conditioning

Components of pneumatic systems include:

Precoolers

Pressure regulator and shutoff valves

Temperature modulating valve

Check valves

Over-pressure valves

Temperature regulating valves

Underloading valves

Shuttle valves

Back pressure valves

Outflow valves

Heat exchangers

Moisture separators

Chemical driers

Filters

Mechanical compressors

Compressed air bottles

De-icing boots

Ducting

Components of fuel storage and distribution systems include:

Integral fuel cells

Rigid and flexible fuel cells

External fuel tanks

Rigid and flexible plumbing and couplings

Manifolds

Selector valves

Anti-surge valves

Anti-gravity valves

Fuel quantity indication

Fuel flow indication

Boost pumps

Transfer pumps

Filters

Strainers

Fuel heaters


Performance Evidence

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria under the specified conditions of assessment, and must include:

laying out a typical aircraft mechanical system

laying out a typical aircraft hydraulic system

laying out a typical aircraft pneumatic system

laying out a typical fuel storage and distribution system

setting up and operating a basic hydraulic system that includes:

hydraulic rig

manual selector valve

filter

accumulator

check valve

linear actuators

rigid and flexible plumbing

applying relevant WHS precautions, including the use of PPE and MSDS.


Knowledge Evidence

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:

fluid power principles

plumbing identification marking

mechanical, hydraulic and pneumatic aircraft systems, their components and maintenance requirements

the relative advantages and disadvantages of mechanical, hydraulic and pneumatic systems

hydraulic fluid types, characteristics and handling precautions

aircraft fuel storage and distribution systems and components thereof

aircraft fuels, their characteristics and handling precautions

WHS precautions relating to aircraft systems and their operation.