Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

MEA404B Mapping and Delivery Guide
Disassemble and reassemble aircraft structure for major repair or modification

Version 1.0
Issue Date: May 2024


Qualification -
Unit of Competency MEA404B - Disassemble and reassemble aircraft structure for major repair or modification
Description This unit is part of the Aeroskills Structures Maintenance Certificate IV training pathway. It covers the competencies required to disassemble and reassemble aircraft structure for the purpose of major repair or modification. No licensing requirements apply to this unit at the time of publication.
Employability Skills This unit contains employability skills.
Learning Outcomes and Application This unit requires application of hand skills and use of maintenance publications, drawings, and appropriate jigs, fixtures and tools to disassemble and reassemble aircraft structure for major repairs or modifications.Applications include fixed and rotary wing aircraft.
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.
Prerequisites/co-requisites MEA403B Repair/modify aircraft structure
Competency Field Aviation maintenance
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Interpret specifications and organise materials.
  • Specifications and drawings or repair scheme documentation are interpreted to determine component and material requirements.
  • Procedure for assembly/disassembly of structure is determined in order to plan equipment use.
  • Appropriate jigs, fixtures or bracing requirements are determined to ensure maintenance of contour/structural integrity during disassembly/assembly operations.
  • All components and equipment are organised.
       
Element: Prepare aircraft or sub-assembly for structural disassembly.
  • Structure is supported and prepared with appropriate jigs, fixtures or bracing as required.
  • Structural component removal is undertaken to provide access as required.
       
Element: Disassemble aircraft structure or sub-assembly.
  • Aircraft standard practices are applied to the removal of structural hardware and fasteners.
  • Disassembled components are tagged to facilitate correct reassembly as required.
       
Element: Prepare components and tooling for assembly.
  • Jigs and fixtures are set up to ensure accuracy of component assembly.
  • Component alignment is checked for conformance to specifications prior to fastener hole generation.
  • Hole location/relocation is carried out in accordance with specification procedures and standard practices.
  • Standard practices are followed in hole generation sequencing to ensure that assembly stress defects are not built in.
  • Components are disassembled, cleaned, deburred and surface treatments are applied prior to final assembly.
       
Element: Assemble aircraft structure or sub- assembly.
  • Sealants and/or adhesives are selected and applied in accordance with assembly specifications or appropriate documentation.
  • Components are positioned and secured with appropriate temporary fastening devices for accurate assembly.
  • Fasteners are selected and installed in accordance with assembly specifications or appropriate manuals.
       
Element: Inspect completed assemblies.
  • Assembled components are inspected to confirm dimensional accuracy and specifications are met.
  • Checking or testing equipment is used where appropriate to ensure requirements are met.
  • Required documentation is completed and processed in accordance with standard enterprise procedures.
       


Evidence Required

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.

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, drawings and specifications and appropriate jigs, fixtures and tools to disassemble and reassemble aircraft structure 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 areas that require similar techniques. It is essential that procedures take into account all safety precautions and quality requirements, standards and practices, and processes associated with assembly.

Evidence of knowledge about repair techniques and the use of the standard repair manual in a range of different repair situations will be necessary to supplement evidence of ability to plan and undertake structure and component repair.

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 elements from each of Groups 1 to 3 listed 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, using tools and equipment specified by aircraft maintenance manuals. It is also expected that general purpose tools and ground support equipment found in most routine situations would be used where appropriate.

Method of assessment

Guidance information for assessment

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

Required skills

Look for evidence that confirms skills in:

application of relevant OH&S procedures

the use of approved maintenance documentation and aircraft publications relating to aircraft structure

correctly interpreting repair scheme/modification drawings (including third angle projection, isometric, sectional formats) and procedural instructions/specifications

correctly supporting the aircraft structure by jacking, trestling, bracing and/or jigging methods

identifying various aircraft metals/composite materials and their basic metallurgy properties by interpretation of markings, numbering systems or visual, chemical or mechanical means

handling and storing aircraft metals and composite materials to industry standards

identifying aircraft structural assembly fasteners (metal and composite) by interpretation of markings, numbering systems, size, shape and colour

using appropriate hand tools and machines to remove and assemble aircraft structural components, parts, sections and skin including riveting equipment, drilling equipment, aligning tools, reamers and material fasteners (grip pins)

applying correct removal and installation techniques for general and close tolerance fasteners (rivets, standard and oversize - hilocks) including hole preparation and location techniques

performing aircraft alignment and mensuration checks

restoring aircraft structure surface finishes

Required knowledge

Look for evidence that confirms knowledge of:

aircraft construction principles

describing the basic construction methods used to assemble:

fuselage (pressure and non-pressurised)

wings, vertical and horizontal stabilisers, rotary wing tail cones and pylons

engine nacelles/pylons

doors and windows, including seals, sealants and locking mechanisms

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

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

Scope

The competency applies to:

1. Assembly of aircraft sub-assembly or end items from detailed parts using jigs and fixtures

2. Repair or modification of aircraft structure through specific repair schemes defined in structural repair manuals and other relevant documentation

3. Repair by replacement of major structural load carrying members, for example, skins, longerons, spars, frames, bulkheads.

Assembly procedures will include:

Assembly procedures will include:

drilling, reaming, counter-sinking

fitting of fasteners and rivets

application of adhesives and sealants

fitting of hardware

application of corrosion inhibitors and protective coatings

Assembly stress defects can refer to:

oil canning, buckling, contour misalignment

Application of this unit may relate to:

scheduled or unscheduled maintenance

individual or team related activities

Procedures and requirements

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

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Specifications and drawings or repair scheme documentation are interpreted to determine component and material requirements. 
Procedure for assembly/disassembly of structure is determined in order to plan equipment use. 
Appropriate jigs, fixtures or bracing requirements are determined to ensure maintenance of contour/structural integrity during disassembly/assembly operations. 
All components and equipment are organised. 
Structure is supported and prepared with appropriate jigs, fixtures or bracing as required. 
Structural component removal is undertaken to provide access as required. 
Aircraft standard practices are applied to the removal of structural hardware and fasteners. 
Disassembled components are tagged to facilitate correct reassembly as required. 
Jigs and fixtures are set up to ensure accuracy of component assembly. 
Component alignment is checked for conformance to specifications prior to fastener hole generation. 
Hole location/relocation is carried out in accordance with specification procedures and standard practices. 
Standard practices are followed in hole generation sequencing to ensure that assembly stress defects are not built in. 
Components are disassembled, cleaned, deburred and surface treatments are applied prior to final assembly. 
Sealants and/or adhesives are selected and applied in accordance with assembly specifications or appropriate documentation. 
Components are positioned and secured with appropriate temporary fastening devices for accurate assembly. 
Fasteners are selected and installed in accordance with assembly specifications or appropriate manuals. 
Assembled components are inspected to confirm dimensional accuracy and specifications are met. 
Checking or testing equipment is used where appropriate to ensure requirements are met. 
Required documentation is completed and processed in accordance with standard enterprise procedures. 

Forms

Assessment Cover Sheet

MEA404B - Disassemble and reassemble aircraft structure for major repair or modification
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:

Assessment Record Sheet

MEA404B - Disassemble and reassemble aircraft structure for major repair or modification

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

Date: