7232 Aircraft engine mechanics and fitters  

101313 Remove and install aircraft hydro-mechanical system and landing gear components

(ก) ความต้องการด้านทักษะ

See Appendix A

(ข) ความต้องการด้านความรู้

See Appendix A

(a) Performance Evidence

      Evidence required to express competency in this unit must be related to and fulfil all of the requirements of the elements and performance criteria under the indicated conditions of assessment, and must include:

• Using hand skills and tools in the inspection, adjustment and troubleshooting of hydraulic, fuel and landing gear systems.

• Using hand skills and tools in the inspection, adjustment and troubleshooting of hydraulic and fuel system components.

• Jacking of the aircraft, as required, for landing gear system inspection, testing and troubleshooting.

• Using hand skills and tools in the inspection, adjustment and troubleshooting of landing gear components.

• Using maintenance manuals to prepare the aircraft for inspection, testing and troubleshooting of hydro-mechanical and landing gear systems and components.

• Effectively using maintenance documentation and relevant fault diagnosis guides in the troubleshooting process.

• Recognising external defects in hydro-mechanical and landing gear systems and Components. 

• Applying standard procedures.

• Observing all relevant WHS practices, including the use of MSDS and PPE.

    The fundamental skills inherent in this unit should be transferable across a range of inspection, testing and troubleshooting tasks (including the timely involvement of supervisors or other trades) associated with aircraft hydro-mechanical and landing gear systems and their components. 

    It is crucial that system test procedures consider all safety precautions relevant to the maintained system, especially where system operation/switching interrelates to other systems being maintained.

    It is essential to be able to interpret inspection procedures and specifications (allowable limits) and apply them in practice. This shall be demonstrated through application across a range of airframe systems and components as specified in the Assessment Conditions.



(b) Knowledge Evidence

      Evidence required to express competency in this unit must be related to and fulfil all of the requirements of the elements and performance criteria and include knowledge of:

• Standard trade practices relating to tool usage and installation/securing of aircraft hardware.

• Fluid power theory.

• Hydraulic system layout, operation and characteristics (including electrical system interfaces) and system component construction and operation for:

• Flight control systems including primary controls, flaps, speed brakes and spoilers.

• Landing gear retraction systems.

• Brake and anti-skid systems.

• Nosewheel steering systems.

• Fuel system and component layout, operation and characteristics (including electrical system interfaces) and system component operation and construction.

• Construction and operation of landing gear components, including:

• Wheel assemblies.

• Skids.

• Floats.

• Struts/oleos.

• Uplocks and downlocks.

• Mechanical linkages.

• How to configure the aircraft for inspection, testing and troubleshooting of hydraulic, fuel and landing gear systems and components.

• Maintenance requirements and troubleshooting procedures.

• Relevant WHS practices relating to hydraulic systems, fuel systems and landing gear components, including lifting and handling of heavy items.

• How to obtain MSDS.

• Selection and use of PPE.

• Relevant maintenance manuals.

• Relevant regulatory requirements and standard procedures.



(c) Assessment recommendation

      N/A

(a) Recommendation

     Different working environments and conditions that may affect performance are admissible in this field. Crucial 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.



(b) Description

      Hydro-mechanical systems include:

• Hydraulic systems.

• Fuel systems.

   Components of hydro-mechanical systems include:

• Hydraulic accumulators, filters, reservoirs, valves, pumps, motors, actuators, regulators and direct reading gauges. 

• Fuel system filters, valves, pumps, rigid and flexible storage cells/tanks.

• Rigid and flexible pipelines, hoses and fittings. 

   Landing gear systems include:

• Retraction systems.

• Steering systems.

• Brake systems, including anti-skid, where applicable.

Landing gear components include:

(Components of landing gear systems are included in hydro-mechanical system components). 

• Wheel assemblies, skids and floats.

• Brake units.

• Struts/oleos.

   Procedures and requirements include:

• Industry standard procedures specified by manufacturers, regulatory authorities or the enterprise.

  Electrical interface includes:

• Associated electrical loom terminations and/or plugs.

• The assessment are based on combination of paper exams, interviewing, and practical demonstrations depending on the assessors’ judgement.

• Competency should be assessed in the work environment or simulated work environment, using procedures, tools and equipment stated in maintenance documentation. It is also expected that applicable general-purpose tools, test and ground support equipment found in most routine situations           would be used where appropriate.

• Before undertaking any action, the application of testing procedures should clearly indicate knowledge of system operation, the relationship of individual components and the links with other systems (if applicable) within the limits of the aircraft/system fault-finding guide.The work plan should consider applicable safety (including safe handling of heavy components) and quality requirements according to the industry and regulatory standards.

• The level of troubleshooting is restrictedto its application to the use of fault diagnosis guides or other similar information.

• A person cannot be assessed as competent until it can be demonstrated to the satisfaction of the workplace assessor that the relevant elements and performance criteria of this unit of competency are being achieved under routine supervision on each type of system:

• Hydraulic systems.

• Fuel systems.

• Retraction systems.

• Steering systems.

• Brake systems, including anti-skid, where applicable and on at least one (1) component from each of the following groups:

• Hydraulic accumulators, filters, reservoirs, valves, pumps, motors, actuators,regulators, direct reading gauges.

• Fuel system filters, valves, pumps, rigid and flexible storage cells/tanks rigid and flexible pipelines, hoses and fittings.

• Wheel assemblies, skids and floats.

• Brake units.

• Struts/oleos.

    Where the aircraft is rotary wing and is fitted with skids or floats, coverage of retractionsystems, steering systems and brake systems and their components is not required. Wherea rotary wing aircraft is fitted with a fixed undercarriage with wheels, coverage ofretraction and steering systems and their components is not required.

    This shall be proven via the records in the Log of Industrial Experience andAchievement or, where appropriate, an equivalent Industry Evidence Guide.