7232 Aircraft engine mechanics and fitters 

101301 Interpret work health and safety practices in aviation maintenance

101302 Apply quality standards applicable to aviation maintenance processes

101303 Interpret and use aviation maintenance industry manuals and specifications

101304 Complete aviation maintenance industry documentation

101305 Perform basic hand skills, standard trade practices and fundamentals in aviation maintenance

(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 relevant WHS procedures, including the use of MSDS and PPE.

• Using relevant maintenance documentation and aircraft manuals.

• Recognising external and internal signs of defects in piston engines, components and system components visual/physical inspection.

• Assisting with testing of piston engine and engine system operation, be able to operate systems, monitor indications, record parameters and recognise correct function.

• Compiling engine condition monitoring records.

• Rigging and adjusting engine controls and systems.

• Using fault diagnosis guides and equivalent data to accurately and efficiently troubleshoot the causes of unserviceability in piston engines and engine systems, clearly record details and identify the required rectification actions.

• Correctly removing and installing piston engine, engine components and fixed pitch propellers, including spinners.

• Inspecting propellers for security, damage and deterioration.

• Blending out metal propeller nicks and dents that are within maintenance manual limits.



      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 engines, engine systems and fixed pitch propellers. It is essential that system testing procedures consider all safety precautions associated with piston engine system operation, and that awareness be demonstrated of dual inspection requirements associated with work on engine controls. This shall be demonstrated through application across a number of engine systems or types and propellers made from different materials.

    It is essential to be able to interpret inspection procedures and specifications (allowable limits) and apply them in practice. Knowledge of system operation related to

testing procedures and functional rigging checks should also be indicated.



(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:

• WHS procedures associated with engine and propeller maintenance, including lifting and handling of heavy objects.

• How to obtain MSDS.

• Use of PPE.

• Relevant maintenance manuals.

• Relevant regulatory requirements and standard procedures.

• Fault diagnosis techniques.

• Piston engine and engine system layout and operation:

• Four stroke engine theory of operation and performance.

• Cylinder configurations.

• Construction (components and materials).

• Carburetors and air induction systems.

• Fuel injection systems.

• Fuels and their characteristics.

• Ignition systems.

• Lubricating systems and lubricants.

• Cooling systems.

• Exhaust systems.

• Accessory drives and mounts.

• Normally aspirated piston engine maintenance requirements and troubleshooting procedures.

• System component operation. including electrical and instrument system interfaces:

• Magnetos and ignition harnesses.

• Spark plugs.

• Fuel pumps.

• Fuel filters.

• Oil pumps.

• Oil filters.

• Oil tanks.

• Vacuum pumps.

• Generators.

• Starter motors.

• Oil pressure gauges (direct reading).

• Temperature gauges (direct reading).

• Tachometers.

• Manifold pressure gauges.

• Maintenance requirements and troubleshooting procedures.

• Removal and installation procedures for piston engines and engine components:

• Removal procedures and handling.

• Control linkages.

• Electrical wiring.

• Engine instrument connections.

• Installation and rigging.

• Ground running.

• System component removal, installation and system testing.

• Propellers, materials and damage and deterioration criteria:

• Fixed pitch propeller types, terminology and theory:

• Tractor/pusher.

• Matching to engine and aircraft.

• Leading edge/trailing edge.

• Blade stations.

• Forces acting on a propeller.

• Propeller balance.

• Materials and construction methods:

• Metal propeller metals, construction and surface protection.

• Wooden propeller materials, construction and surface protection.

• Composite propeller materials, construction and surface protection.

• Damage and deterioration.

• Methods of blending out of minor damage to metal propellers.

• Propeller removal and installation 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

      Piston engines and components/systems include:

• Normally aspirated engine (all types), main components and accessories/drives.

• Control system.

• Starter system.

• Fuel and air systems.

• Exhaust system.

• Oil system (if dry sump) (where applicable to the enterprise).

• Engine and/or system operation includes:

• Testing of engines fitted to helicopters (where auxiliary drive is not available) shall be carried out through the applicant directing a pilot qualified on type



Fixed pitch propellers:

• Fixed pitch propeller may include a spinner and the propeller will be made from:

• Metal.

• Composite.

• Wood.



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 tools and equipment stated in maintenance documentation. It is also expected that general-purpose tools and test equipment found in most routine situations would be used where appropriate.

• Before undertaking any action, engine system operation knowledge, the relationship of individual components and the links with other systems will be necessary to supplement evidence of ability to carry out rigging checks and troubleshoot the system 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 workplace assessor that the relevant elements and performance criteria of the unit of competency are being achieved under routine supervision on at least one (1) item from each of:

• Normally aspirated engine (all types), main components and accessories/drives.

• Control system.

• Starter system.

• Fuel and air systems.

• Exhaust system.

• Oil system (if dry sump) (may be omitted where not applicable to the enterprise).

• And on at least one (1) type of fixed pitch propeller.



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