This unit requires application of hand skills and the use of maintenance publications to remove and install rotors and associated flight control system components.

Applications include rotary wing aircraft.

MEA302C

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

ELEMENT

PERFORMANCE CRITERIA

1. Remove rotary wing rotor

1.1. System is rendered safe and prepared in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices. Isolation and warning signs are installed/fitted to ensure personnel safety.

1.2. Rotary wing rotor removal is carried out in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices.

1.3. Required aircraft maintenance documentation is completed and processed in accordance with standard enterprise procedures.

1.4. Removed components are labelled, sealed and packaged in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices.

2. Remove rotary wing flight control system components.

2.1. System is rendered safe and prepared in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices. Isolation and warning signs are installed/fitted to ensure personnel safety.

2.2. Rotary wing flight control system component removal is carried out in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices.

2.3. Required aircraft maintenance documentation is completed and processed in accordance with standard enterprise procedures.

2.4. Removed components are labelled, sealed and packaged in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices

3. Install rotary wing rotor

3.1. Rotor to be installed is checked to confirm correct part or model numbers, modification status and serviceability.

3.2. Mass balance of rotor blades/head is checked in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices.

3.3. Installation is carried out in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices.

3.4. Support/safety equipment is removed at the appropriate time to ensure personnel safety and freedom from structural damage.

4. Install rotary wing flight control system components.

4.1. Rotary wing flight control system components to be installed are checked to confirm correct part or model numbers, modification status and serviceability.

4.2. Installation is carried out in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices.

4.3. Support/safety equipment is removed at the appropriate time to ensure personnel safety and freedom from structural damage.

4.4. Required aircraft maintenance documentation is completed and processed in accordance with standard enterprise procedures.

Required skills

Look for evidence that confirms skills in:

Application of relevant occupational health and safety (OHS) practices including lifting and handling heavy components

The use of relevant maintenance documentation and aircraft manuals to:

correctly remove and install main rotors and rotor heads

check the mass balance of rotor blades and heads

correctly remove and install tail rotor blades and pitch control assemblies

locate and correctly remove and install mechanical flight control system components

locate and correctly remove and install drive train components such as gearboxes and drive shafts and couplings

identify the requirements for component balancing

Identifying the requirements for adjustment and rigging of systems after component removal and installation

Required knowledge

Look for evidence that confirms knowledge of:

Component attachment methods

Removal and installation procedures for:

main rotors and rotor blades

rotor heads

tail rotors and tail rotor blades

swash plates

tail rotor pitch control assemblies

Requirements for the checking and adjustment of blade tracking after rotor maintenance

Control system layout, linkages and operation (operation only to the extent necessary for the specified tasks) including the requirement for rigging and the independent inspection of work performed

Power train layout and assembly:

main rotor gearboxes

intermediate gearboxes

tail rotor gearboxes

drive shafts

couplings

Relevant OHS practices including those relating to lifting and handling of heavy items

Relevant maintenance manuals

Relevant regulatory requirements and standard procedures

The Evidence Guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

A person who demonstrates competency in this unit must be able to apply hand skills and use maintenance publications to remove and install rotary wing aircraft rotors and flight control system components while applying all relevant safety precautions.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

The underlying skills inherent in this unit should be transferable into other units that require similar techniques. It is essential that safety precautions applicable to the rotary wing rotor and flight control system components being maintained, including allowance for the effect on weight and balance (ie cg) when heavy components are removed, are fully observed, understood and complied with.

Evidence of transferability of skills and knowledge related to removal and installation is essential. This may be demonstrated through removal and installation of a representative range of the rotary wing rotor and flight control system components. An understanding of component attachment methods, the need for adjustment or rigging and system operation as it relates to the work must be demonstrated before undertaking any action. The work plan should take account of applicable safety and quality requirements in accordance with 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 of the Unit of Competency are being achieved under routine supervision on at least one item from each of Groups 1 to 6 in the Range Statement. This shall be established via the records in the Log of Industrial Experience and Achievement or, where appropriate, an equivalent Industry .

Context of and specific resources for assessment

Competency should be assessed in the work environment or simulated work environment using tools and equipment specified in aircraft maintenance manuals. It is also expected that general purpose tools, test and ground support equipment found in most routine situations would be used where appropriate.

Method of assessment

Guidance information for assessment

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Note

Range statements listed below are numbered to facilitate specification of the assessment requirements included in the Evidence Guide.

Rotary wing rotors and flight control system components

Rotary wing rotors and flight control system components may include:

1. Main rotor blades, tail rotor blades

2. Rotor heads

3. Swash plates, tail rotor pitch control assemblies

4. Mechanical flight control components (i.e. cables, pulleys, guides, fairleads, tension regulators, control rods, bellcranks, torque tubes, control sticks or columns, tail rotor pedals) and mechanical components of powered flight control systems

5. Main rotor, intermediate or tail rotor gearboxes

6. Drive shafts, couplings.

Powered flight controls

In the case of hydraulically powered rotor control system components and related plumbing, maintenance work should be assessed against MEA302B Remove and install aircraft hydro-mechanical and landing gear system components

Application of this unit may relate to:

Scheduled or unscheduled maintenance activities

Individual or team related activities

Procedures and requirements

Refer to industry standard procedures specified by manufacturers, regulatory authorities or the enterprise

Unit sector

Aviation maintenance

This unit contains employability skills.