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. | Prepare to undertake repair | 1.1 | Extent of damage is correctly assessed to assist in determining repair procedure |
| | 1.2 | Appropriate repair scheme is identified in accordance with structural repair manual and/or approved data |
| | 1.3 | Specialist advice is obtained in establishing an approved repair scheme where a standard repair scheme cannot be identified or damage is out of limits |
| | 1.4 | All materials and equipment required are organised |
2. | Repair aircraft structure | 2.1 | Structural repairs are performed in accordance with approved repair scheme ensuring that aircraft standard practices are used and process requirements are carried out while observing all relevant work health and safety (WHS) requirements, including the use of material safety data sheets (MSDS) and items of personal protective equipment (PPE) |
| | 2.2 | Preventative maintenance techniques are employed to preserve the integrity of aircraft structure |
| | 2.3 | Work area is cleaned of all waste material or contaminants |
| | 2.4 | Required maintenance documentation is completed and processed in accordance with standard enterprise procedures |
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 all relevant WHS procedures, including the selection and use of MSDS and applicable items of PPE
identifying damage to aircraft metallic (ferrous and non-ferrous) structures and/or components by way of impact, fatigue or the various types of corrosion
inspecting damage and assessing composite components/structures
identifying various aircraft metals and their basic properties
identifying composite materials used in aircraft construction, associated safety precautions and hazards
correctly interpreting repair scheme drawings, including third angle projection, isometric, sectional formats and hand sketches
using appropriate hand tools and machines, including riveting equipment, drilling equipment, aligning tools and material fasteners (grip pins)
applying correct removal, installation and repair techniques for:
a range of rivets (blind and solid) using hand, squeeze and pneumatic situations
a range of close tolerance fasteners (standard and oversize – hillocks and taper locks), including hole preparation
threaded devices, including internal and external thread cutting, Helicoil inserts and damaged stud replacement
hardware assembled by close tolerance fits using heat, cooling and force methods, including bearings, bushes and inserts
performing a range of metal structure and composite material repair techniques, including:
metal scab patch, flush, splice, lap and formed section repair
composite external patch, scarf, stepped and bolted repairs
metal to metal and metal to composite bonding
applying structural corrosion removal/treatment techniques
restoring aircraft structure sealing and surface finishes.
It is essential that the procedures take into account all aircraft and personal safety precautions relating to aircraft structure.
Evidence of transferability of skills and knowledge related to inspection, testing and repair of aircraft structure is essential. This may be demonstrated through application across a number of aircraft structures or aircraft types. Ability to interpret inspection and repair procedures and specifications and apply them in practice is critical. The application of the procedures should also clearly indicate knowledge of structural flight loads and aerodynamic requirements.
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:
applicable WHS procedures, including the use of PPE and MSDS
requirements for handling and storing aircraft metals and composite materials, including sealing agents, to industry standards
means of identifying aircraft structural assembly fasteners (metal and composite) by interpretation of markings, numbering systems, size, shape and colour
structural and non-structural component methods of attachment, faying surface treatment and fuel tank sealing
assessment of structural damage:
types and classes of mechanical damage
types of corrosion and determining the extent of damage
relevant documentation and manuals
damage limits and repair schemes for metallic and non-metallic structure
procedures for the fabrication and fitment of metal repairs:
scab patch
flush patch
splice
lap
formed section
corrosion removal and passivation
procedures for performing composite repairs:
external patch
scarf patch
stepped repairs
bolted repairs
repair of integral fuel tanks and sealing of faying surfaces, including specific WHS and PPE requirements
surface finishes and methods of restoration, including specific WHS and PPE requirements
how to obtain MSDS
relevant maintenance and structural repair manuals
relevant regulatory requirements and standard procedures.
Competency should be assessed in the work environment or simulated work environment using tools and equipment specified in maintenance documentation. It is also expected that general-purpose tools and test equipment found in most routine situations would be used where appropriate.
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 across the variables in the Range of Conditions as follows:
recognition of each type of damage:
impact damage
fatigue cracking
corrosion
delamination of composites and bonded structures
one (1) repair task from each of the following groups:
remove corrosion by chemical and mechanical methods
restore protective coatings
apply sealants and jointing compounds
freehand precision hole generation
remove and install structural hardware and fastening devices
remove and replace bushes, bearings and bearing surfaces
metal scab patch, flush, splice, lap and formed section repair
composite external patch, scarf and stepped repairs.
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.
The competency elements and performance criteria also cover a significant portion of those required for unit MEA339 Inspect, repair and maintain aircraft structures. Refer to that unit for details of credits that may be granted during assessment.