List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.
Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. |
1. | Inspect rotor and rotor control systems and components | 1.1 | 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 |
| | 1.2 | 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 |
| | 1.3 | Defects are identified and recorded in accordance with standard enterprise procedures |
2. | Ground test rotor and rotor control systems | 2.1 | 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 |
| | 2.2 | 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 |
| | 2.3 | System calibration or adjustments are performed in accordance with relevant aircraft publications/maintenance regulations/orders and standards and practices |
3. | Prepare for troubleshooting | 3.1 | Relevant aircraft publications and modification status, including system defect reports, are interpreted to identify an unserviceability |
4. | Troubleshoot rotor and rotor control systems | 4.1 | Available information from aircraft maintenance documentation, inspection and test results is used to assist in fault determination |
| | 4.2 | Relevant aircraft publication fault diagnosis guide and logical processes are used to ensure efficient and accurate troubleshooting to line replacement level |
| | 4.3 | Specialist advice is obtained to assist with the troubleshooting process |
| | 4.4 | 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 |
| | 4.5 | Fault rectification requirements are determined |
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.
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.
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 applicable general-purpose tools, test and ground support equipment found in most routine situations would be used where appropriate.
The application of ground testing procedures should clearly indicate knowledge of system operation. System operation knowledge, the relationship of individual components and the links with other systems will be necessary to supplement evidence of ability to troubleshoot the system within the limits of the aircraft/system fault-finding guide before undertaking any action. The work plan should take account of applicable safety and quality requirements in accordance with the industry and regulatory standards.
Functional testing of rotors and rotor control systems with engine/s running may be carried out with the applicant directing a pilot qualified on type.
The following conditions of assessment represent the requirements of the Regulators (ADF and CASA) and maintenance stakeholders and must be rigorously observed.
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 the following groups:
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.
This shall be established via the records in the Log of Industrial Experience and Achievement or, where appropriate, an equivalent Industry Evidence Guide (for details refer to the Companion Volume Assessment Guidelines).
Assessors must satisfy the requirements of the National Vocational Education and Training Regulator (Australian Skills Quality Authority, or its successors).
Where the unit is to be used for CASA licensing purposes the Assessor must also meet the criteria specified in the CASR Part 147 Manual of Standards.
Individuals being assessed who have already attained MEA352 Maintain basic rotary wing aircraft systems will have satisfied the requirements of this unit with regard to common Range of Conditions variables. The Log of Industrial Experience and Achievement records relating to MEA352 Maintain basic rotary wing aircraft systems may be accepted as also meeting the evidence requirements for this unit in the applicable common areas.