Assessment Requirements for MEA275 Maintain basic light aircraft instrument systems and components

Release: 1

Assessment Requirements for MEA275 Maintain basic light aircraft instrument systems and components

Modification History

Release 1 - New unit of competency

Performance Evidence

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:

using approved maintenance documentation and aircraft publications relating to basic instrument systems

locating and identifying flight instrument system components comprising:

engine system temperature and speed, including mechanical and electrical tachometers

auxiliary direct reading systems, including vacuum, fuel storage quantities

flight systems, including attitude, altitude, air speed and OAT

locating and identifying direct reading compasses

correct handling and observance of maintenance precautions relating to gyroscopes, gimbals and pitot/static systems (connections, heating and protrusions)

recognising system and component defects/external damage, correct installation, connection of plugs, terminations, attaching hardware, including cabling/harnesses, and security in:

flight instruments

pitot/static systems

direct reading compasses

piston engine and gas turbine engine indication systems

electrical systems indication

basic fuel quantity indication systems

vacuum indication systems

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

performing system functional tests and checks to isolate system faults and assess post-maintenance serviceability

applying WHS requirements relevant to instrument system maintenance.

It is essential that system testing procedures, cleanliness requirements and safety precautions applicable to the instrument system being maintained are fully observed, understood and complied with. Ability to interpret inspection procedures and specifications (allowable limits) and apply them in practice across a range of inspection, testing and troubleshooting applications (including the timely involvement of supervisors or other trades) 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 Assessment Conditions.

Knowledge Evidence

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:

component attachment methods

connection of hardware and plugs

handling precautions for electrostatic sensitive devices

relevant WHS practices

the basic layout (block diagram level), function and operation of the following systems as listed in the Range of Conditions:

pitot/static systems

piston engine and gas turbine engine direct reading indication systems

basic fuel quantity measurement systems

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

instrument construction and operation:

instrument groupings, panel layout and construction

pitot static instruments (ASI, VSI and counter-pointer altimeters), their operation, calibration, safe handling and related terminology

pitot pressure

static pressure

altimeter Q code settings:

QNH

QNE

QFE

indicated airspeed (IAS)

true airspeed (TAS)

vacuum system indication component construction and operation

air and electrically powered artificial horizon construction and operation

DG construction and operation

construction and operation of direct reading engine instruments

turn and bank and slip/turn coordinator construction and operation

direct reading compass construction and compass calibration

piston and gas turbine engine direct reading measuring instruments and temperature indication instruments construction and operation

voltage and current measuring instrument construction and operation

volumetric fluid quantity system components, construction and operation

instrument system maintenance requirements and troubleshooting procedures, including pitot/static system leak testing

relevant maintenance documentation and maintenance publications

relevant regulatory requirements and standard procedures.

Assessment Conditions

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 applicable general-purpose tools and test equipment found in most routine situations would be used where appropriate.

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 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.

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 a system and at least one major system component/line replaceable unit (LRU) from each of the following groups:

pitot/static systems and components, ASI, VSI and counter-pointer altimeters

DGs and AHs (air and electrically driven)

turn and bank and slip/turn coordinators

direct reading compasses

piston engine and gas turbine engine indication system components (direct reading measuring instruments and temperature indication)

electrical systems indication (voltage and current)

basic fuel quantity indication systems and components

vacuum indication components.

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.

Links

MSA Training Package Implementation Guides - http://mskills.org.au/training-packages/info/