7232 Aircraft engine mechanics and fitters  

101409 Inspect aircraft hydro-mechanical, mechanical, gaseous and landing gear systems and 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:

•    Applying all relevant WHS procedures.

•    Using maintenance manuals to prepare the aircraft for testing and troubleshooting of hydraulic, fuel, gaseous, landing gear and mechanical systems and components.

•    Using hand skills, tools and systems knowledge in the testing, adjustment and troubleshooting of hydraulic, fuel, gaseous, mechanical and landing gear systems.

•    Using hand skills, tools and component knowledge in the adjustment and troubleshooting of hydraulic, fuel, gaseous and mechanical system components.

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

•    Using hand skills, tools and system/component knowledge in the adjustment and troubleshooting of landing gear components.

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

•    Recognising external defects in hydro-mechanical, gaseous, mechanical and landing gear systems and components. 

    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, gaseous, mechanical and landing gear systems and their components. It is crucial that system test procedures consider all safety precautions applicable to the system being maintained, 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 systems 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:

•    Hydraulic, fuel, gaseous, mechanical and landing gear system layout, operation and characteristics and system component operation and construction, including electrical system interfaces.

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

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

•    Fluid power theory.

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

•    Landing gear retraction systems.

•    Brake and anti-skid systems.

•    Nose wheel steering systems.

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

•    Gaseous (pneumatic, air conditioning, pressurisation and fire-extinguishing system and component layout, operation and characteristics (including electrical and instrument interfaces) and system component operation and construction.

•    Construction and operation of landing gear components, including:

•    Wheel assemblies.

•    Struts/oleos.

•    Uplocks and downlocks.

•    Mechanical systems and linkages, including those related to the above systems.

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

•    Maintenance requirements and troubleshooting procedures.

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

•    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:

(components of landing gear retraction, steering and braking systems are covered by hydro-mechanical and mechanical system components).

•    Retraction systems.

•    Steering systems.

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

     Landing gear components include:

•    Wheel assemblies.

•    Brake units.

•    Struts/oleos.

     Gaseous systems include:

•    Pneumatic.

•    Air cycle air conditioning.

•    Pressurisation.

•    Fire-extinguishing.

     Gaseous system components include:

•    Gauges (direct reading), temperature sensors, pressurisation controllers and temperature controllers.

•    Heat exchangers, pressure vessels, condensers, compressors, expansion turbines, humidifiers, valves and actuators.

•    Rigid and flexible pipelines and fittings.

•    Ducting.

     Mechanical systems include:

•    Mechanical operating and locking systems.

     Mechanical system components include:

•    Cables, pulleys, guides, fairleads, tension regulators, chains and sprockets.

•    Push/pull rods, torque tubes, bellcranks, screwjacks, clutches, springs, bearings and gears .

     Procedures and requirements include: 

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

•    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 and quality requirements according to the industry and regulatory standards.

•    A person cannot be assessed as competent until it can be demonstrated to the satisfaction of the approved aerospace assessor that the relevant elements and performance criteria of this unit of competency are being achieved under routine supervision on each type of system and on at least one       (1) component of each group, as follows:

•   Hydraulic systems – a system and at least one (1) component from each of the following hydro-mechanical system component groups:

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

•   Rigid and flexible pipelines, hoses and fittings.

•   Fuel systems – a system and at least one (1) component from each of the following fuel system component groups:

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

•   Rigid and flexible pipelines, hoses and fittings.

•   Landing gear systems – each of the following systems:

•   Retraction systems.

•   Steering systems.

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

•   Landing gear components – one (1) each of:

•   Wheel assemblies.

•   Brake units.

•   Struts/oleos.

•   Gaseous systems – each of the following systems:

•   Pneumatic.

•   Air cycle air conditioning.

•   Pressurisation.

•   Fire-extinguishing.

•   Gaseous system components - at least one (1) component from each of the following gaseous system component groups:

•   Gauges (direct reading), temperature sensors, pressurisation controllers and temperature controllers.

•   Heat exchangers, pressure vessels, condensers, compressors, expansion turbines, humidifiers, valves and actuators.

•   Rigid and flexible pipelines and fittings.

•   Ducting.

•   Mechanical systems – a mechanical operating and locking system and at least one (1) component from each of the following mechanical system component groups:

•   Cables, pulleys, guides, fairleads, tension regulators, chains and sprockets.

•   Push/pull rods, torque tubes, bellcranks, screwjacks, clutches, springs, bearings and gears.

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

•    Individuals being assessed who have already attained the following related units will have met the Performance Criteria and Range of Conditions variables for Elements listed:

•   Element 1 – any one of 101404 Inspect, test and troubleshoot aircraft hydro-mechanical and landing gear system and components, or MEA310 Inspect, test and troubleshoot aircraft pneumatic systems and components.

•   Elements 2 and 3 – 101404 Inspect, test and troubleshoot aircraft hydro-mechanical and landing gear system and components, for hydro-mechanical system variables, and 101405 Inspect, test and troubleshoot aircraft pneumatic systems and components, for gaseous system variables.

    The Log of Industrial Experience and Achievement records relating to the listed units may be accepted as also meeting the evidence requirements for this unit in the applicable Elements for systems and components as listed in the Range of Conditions variables.