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

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

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

What evidence can you provide to prove your understanding of each of the following citeria?

Interpret specifications and organise materials.

  1. Specifications and drawings or repair scheme documentation are interpreted to determine component and material requirements.
  2. Procedure for assembly/disassembly of structure is determined in order to plan equipment use.
  3. Appropriate jigs, fixtures or bracing requirements are determined to ensure maintenance of contour/structural integrity during disassembly/assembly operations.
  4. All components and equipment are organised.
Specifications and drawings or repair scheme documentation are interpreted to determine component and material requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Procedure for assembly/disassembly of structure is determined in order to plan equipment use.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Appropriate jigs, fixtures or bracing requirements are determined to ensure maintenance of contour/structural integrity during disassembly/assembly operations.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

All components and equipment are organised.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare aircraft or sub-assembly for structural disassembly.

  1. Structure is supported and prepared with appropriate jigs, fixtures or bracing as required.
  2. Structural component removal is undertaken to provide access as required.
Structure is supported and prepared with appropriate jigs, fixtures or bracing as required.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Structural component removal is undertaken to provide access as required.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Disassemble aircraft structure or sub-assembly.

  1. Aircraft standard practices are applied to the removal of structural hardware and fasteners.
  2. Disassembled components are tagged to facilitate correct reassembly as required.
Aircraft standard practices are applied to the removal of structural hardware and fasteners.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Disassembled components are tagged to facilitate correct reassembly as required.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare components and tooling for assembly.

  1. Jigs and fixtures are set up to ensure accuracy of component assembly.
  2. Component alignment is checked for conformance to specifications prior to fastener hole generation.
  3. Hole location/relocation is carried out in accordance with specification procedures and standard practices.
  4. Standard practices are followed in hole generation sequencing to ensure that assembly stress defects are not built in.
  5. Components are disassembled, cleaned, deburred and surface treatments are applied prior to final assembly.
Jigs and fixtures are set up to ensure accuracy of component assembly.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Component alignment is checked for conformance to specifications prior to fastener hole generation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Hole location/relocation is carried out in accordance with specification procedures and standard practices.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Standard practices are followed in hole generation sequencing to ensure that assembly stress defects are not built in.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Components are disassembled, cleaned, deburred and surface treatments are applied prior to final assembly.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assemble aircraft structure or sub- assembly.

  1. Sealants and/or adhesives are selected and applied in accordance with assembly specifications or appropriate documentation.
  2. Components are positioned and secured with appropriate temporary fastening devices for accurate assembly.
  3. Fasteners are selected and installed in accordance with assembly specifications or appropriate manuals.
Sealants and/or adhesives are selected and applied in accordance with assembly specifications or appropriate documentation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Components are positioned and secured with appropriate temporary fastening devices for accurate assembly.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Fasteners are selected and installed in accordance with assembly specifications or appropriate manuals.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Inspect completed assemblies.

  1. Assembled components are inspected to confirm dimensional accuracy and specifications are met.
  2. Checking or testing equipment is used where appropriate to ensure requirements are met.
  3. Required documentation is completed and processed in accordance with standard enterprise procedures.
Assembled components are inspected to confirm dimensional accuracy and specifications are met.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Checking or testing equipment is used where appropriate to ensure requirements are met.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Required documentation is completed and processed in accordance with standard enterprise procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

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

Required Skills and Knowledge

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

Range Statement

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