Google Links

Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Inspect rotor and rotor control systems and components
   • Isolation and warning signs are fitted/installed to the system or related systems and the aircraft configured for safe system inspection and operation in accordance with relevant aircraft publications/maintenance regulations orders and standards and practices
   • Rotor and rotor control system is visually or physically checked/inspected for external signs of defects in accordance with relevant aircraft publications maintenance regulations/orders and standards and practices while observing all relevant work health and safety (WHS) requirements
   • Defects are identified and recorded in accordance with standard enterprise procedures
2. Ground test rotor and rotor control systems
   • Aircraft and system prepared in accordance with relevant aircraft publications/maintenance regulations orders and standards and practices for the operation of engine and rotor system
   • Rotor and rotor control system are functionally tested in accordance with relevant aircraft publications maintenance regulations/orders and standards and practices for evidence of malfunction
   • System calibration or adjustments are performed in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices
3. Prepare for troubleshooting
   • Relevant aircraft publications and modification status, including system defect reports, are interpreted to identify an unserviceability
4. Troubleshoot rotor and rotor control systems
   • Available information from aircraft maintenance documentation, inspection and test results is used to assist in fault determination
   • Relevant aircraft publication fault diagnosis guide and logical processes are used to ensure efficient and accurate troubleshooting to line replacement level
   • Specialist advice is obtained to assist with the troubleshooting process
   • Rotor and rotor control system faults are located and the causes of the faults are clearly identified and recorded in aircraft maintenance documentation in accordance with standard enterprise procedures
   • Fault rectification requirements are determined

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.
Rotor and rotor control systems include:	Main rotor blades and tail rotor blades Rotor heads, swash plates and tail rotor pitch control assemblies Mechanical, powered flight control components Main rotor, intermediate or tail rotor gearboxes Drive shafts and couplings
Procedures and requirements include:	Industry standard procedures specified by manufacturers, regulatory authorities or the enterprise

---

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 procedures

using relevant maintenance documentation and aircraft manuals to:

recognise through visual/physical inspection external signs of defects in the rotor, rotor head, tail rotor and flight control mechanical system components

ground test the rotor and control system and recognise correct function

rig and adjust rotor controls and systems

using fault diagnosis guides and equivalent data to accurately and efficiently troubleshoot the causes of unserviceabilities in rotor control systems, clearly record details and identify the required rectification actions.

The underlying skills inherent in this unit should be transferable across a range of inspection, testing and troubleshooting applications (including the timely involvement of supervisors or other trades) associated with the rotor control systems. It is essential that testing procedures take into account all safety precautions associated with ground testing of rotor and rotor control systems, and that awareness be demonstrated of dual inspection requirements associated with work on control systems.

Ability to interpret system performance specifications (allowable limits) and apply them in practice is critical and shall be demonstrated through application across the range of systems listed in the Assessment Conditions.

---

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:

fault diagnosis techniques

standard trade practices relating to tool and test/rigging equipment usage

theory of flight:

airflow

conditions of flight

lift and forces

drag

rotary flight principles:

terminology relating to:

aerofoils

main rotor blades

rotor discs

rotors – main and tail

aerodynamic characteristics:

aerofoil design

forces

rotor thrust and power requirements

vortex ring

autorotation

helicopter stability

helicopter dynamic components:

main rotors:

blades

heads

linkages

tail rotors

swash plates

transmissions and drive shafts

clutches and freewheeling units

system and component operation, including electrical and instrument system interfaces:

cyclic pitch control

collective pitch control

tail rotor control

mechanical and powered control systems

engine control interface

torque reaction and anti-torque devices

engine indication

vibration monitoring

helicopter maintenance procedures and troubleshooting

relevant maintenance manuals

relevant regulatory requirements and standard procedures including requirements for engine and rotor system operation

relevant WHS practices.

---