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Elements and Performance Criteria

1. Remove rotary wing rotor
   • 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
   • Rotary wing rotor removal is carried out in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices while observing all relevant work health and safety (WHS) requirements
   • Required aircraft maintenance documentation is completed and processed in accordance with standard enterprise procedures
   • 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
   • 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
   • Rotary wing flight control system component removal is carried out in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices while observing all relevant WHS requirements
   • Required aircraft maintenance documentation is completed and processed in accordance with standard enterprise procedures
   • Removed components are labelled, sealed and packaged in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practice
3. Install rotary wing rotor
   • Rotor to be installed is checked to confirm correct part or model numbers, modification status and serviceability
   • Mass balance of rotor blades/head is checked in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices
   • Installation is carried out in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices while observing all relevant WHS requirements
   • 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
   • Rotary wing flight control system components to be installed are checked to confirm correct part or model numbers, modification status and serviceability
   • Installation is carried out in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices while observing all relevant WHS requirements
   • Support/safety equipment is removed at the appropriate time to ensure personnel safety and freedom from structural damage
   • Required aircraft maintenance documentation is completed and processed in accordance with standard enterprise procedures

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.
Rotary wing rotors and flight control system components include:	Main rotor blades and tail rotor blades Rotor heads Swash plates, and tail rotor pitch control assemblies 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 Main rotor, intermediate or tail rotor gearboxes Drive shafts and couplings
Powered flight controls	In the case of hydraulically powered rotor control system components and related plumbing, maintenance work should be assessed against MEA302 Remove and install aircraft hydro-mechanical and landing gear system components
Procedures and requirements include:	Industry standard procedures specified by manufacturers, regulatory authorities or the enterprise

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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:

applying relevant WHS practices, including lifting and handling heavy components

using 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.

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 (i.e. centre of gravity) 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 as listed in the Assessment Conditions.

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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:

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 WHS practices, including those relating to lifting and handling of heavy items

relevant maintenance manuals

relevant regulatory requirements and standard procedures.

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