Required skills

Look for evidence that confirms skills in

recognition of system and component defectsexternal damage correct installation connection of plugs terminations attaching hardware including cablingharnesses and security in

flight instruments

pitotstatic systems

direct reading compasses

piston engine indication systems

electrical systems indication

basic fuel quantity indication systems

pneumaticvacuum indication systems

applying logic processes taking and interpreting system measurements using test equipment and appropriate wiring diagrams and manuals to isolate instrument system malfunctions in the above systems

performing system functional tests and checks to isolate system faults and assess postmaintenance serviceability

applying OHS requirements relevant to instrument system maintenance

Required knowledge

Look for evidence that confirms knowledge of

the basic layout block diagram level function and operation of

flight systems including

altitude direct reading altimeters

attitude including directional gyros and artificial horizons both air and electrically driven turn and slip and turn coordinator

airspeed

OAT

engine indication systems including

direct reading temperature

direct reading pressure eg oil pressure

speed including mechanical and electric tachometers

manifold pressureboost including aneroid sylphon bellows and dual compartment types

auxiliary direct reading systems including

electrical

hydraulic pressure

pneumatic pressure and vacuum

basic fuel quantity indication

basic instrument system maintenance and testing requirements and troubleshooting procedures

OHS requirements relevant to instrument system maintenance

the operating principles of the above systems and associated with

atmospheric conditions properties and effects on aircraft instruments and systems

pressure and temperature sensing elements and their use in aircraft instruments

gyroscopes and their use in aircraft instrument systems

electrical fundamentals

direct reading compass installations and calibration

relevant maintenance manuals

relevant regulatory requirements and standard procedures

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 inspect test and troubleshoot basic instrument systems and components while observing 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 across a range of inspection testing and troubleshooting applications including the timely involvement of supervisors or other trades associated with aircraft basic instrument systems and components It is essential that system testing procedures cleanliness requirements and safety precautions applicable to the system being maintained are fully observed understood and complied with Ability to interpret inspection procedures and specifications allowable limits and apply them in practice is critical

Evidence of transferability of skills and knowledge related to inspection testing and troubleshooting is essential This is to be demonstrated through application across a range of basic aircraft instrument systems and components listed in the Range Statement

The application of testing procedures should clearly indicate knowledge of system operation the relationship of individual components and the links with other systems if applicable within the limits of the aircraftsystem 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

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 a system and at least one major system componentLRU from each of Groups to 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 Evidence Guide

Context of and specific resources for assessment

Competency should be assessed in the workplace or simulated workplace using tools and equipment specified in the maintenance manuals It is also expected that general and special purpose tools test and ground support equipment would be used where appropriate

Method of assessment

Guidance information for assessment

Individuals being assessed who have already attained MEAA Maintain basic light aircraft instrument systems and components will have satisfied the requirements of this unit with regard to common Range Statement variables Log of Industrial Experience and Achievement records relating to MEAA Maintain basic light aircraft instrument systems and components may be accepted as also meeting the evidence requirements for this unit in the applicable common areas

Individuals being assessed who have already attained MEA275A Maintain basic light aircraft instrument systems and components, will have satisfied the requirements of this unit with regard to common Range Statement variables. Log of Industrial Experience and Achievement records relating to MEA275A Maintain basic light aircraft instrument systems and components, may be accepted as also meeting the evidence requirements for this unit in the applicable common areas.

Note

Instrument systems and components

Troubleshooting

Procedures and requirements