This unit requires application of hand skills and the use of maintenance documentation/publications in the removal and installation of components of advanced instrument systems.

Applications include fixed and rotary wing aircraft that have advanced instrument systems.

MEA201B

Remove and install miscellaneous aircraft electrical hardware/components

ELEMENT

PERFORMANCE CRITERIA

1. Remove advanced aircraft instrument system components.

1.1. System is rendered safe and prepared in accordance with the applicable maintenance manual and isolation tags are fitted where necessary to ensure personnel safety.

1.2. Instrument component removal is carried out in accordance with the applicable maintenance manual.

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

1.4. Removed components are tagged and packaged in accordance with specified procedures.

2. Install advanced aircraft instrument system components.

2.1. Instrument components to be installed are checked to confirm correct part numbers, modification status, serviceability and shelf life.

2.2. Physical installation of instrument components is performed in accordance with the applicable maintenance manual and regulatory requirements, ensuring appropriate adjustment/alignment is carried out.

2.3. System is reinstated to correct operational condition in preparation for testing, as necessary.

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

Required skills

Look for evidence that confirms skills in:

Locating and identifying flight instrument system components comprising:

engine system temperature, pressure (including thermocouples, sensor units and transmitters), speed (including mechanical and electrical tachometers), thrust (fan, propeller, jet), torque, fuel flow and vibration

auxiliary systems including hydraulic pressure and temperature, transmission pressure and temperature, fuel storage quantities, fuel remaining/used, component position, ie flaps, landing gear, speed brakes, door/pylon locking

flight systems including attitude, altitude, air speed, outside air temperature (OAT), ground proximity warning system (GPWS)

Locating and identifying direct reading compasses, remote compass system components (flux valve, gyro, amplifier and indicator), and attitude heading reference system (AHRS) components

Locating and identifying flight data recorder (FDR) system components

Correct handling procedures and maintenance precautions relating to gyroscopes, gimbals, pitot/static systems (connections, heating and protrusions)

Applying relevant occupational health and safety (OHS) practices

Required knowledge

Look for evidence that confirms knowledge of:

Component attachment methods

Connection of hardware and plugs

Handling precautions for electrostatic sensitive devices

Relevant OHS practices

The use of approved maintenance documentation and aircraft publications relating to basic and advance instrument systems

Basic instrument system and component operating principles:

atmospherics and barometry

terminology and unit of measurement conversion

aircraft instrumentation requirements

instrument panel layout

pressure sensing elements

pitot static systems and testing requirements

gyroscopic principles

direct reading compasses

temperature sensors

fluid quantity indication systems

General layout and components of the following systems:

flight systems including:

altitude (direct reading, servo and encoding altimeters)

attitude including directional gyros (DG) and artificial horizons (AH) (both air and electrically driven) and turn and slip, AHRS

airspeed including air speed indicators (ASI), machmeters, air data systems

vertical speed indicators (VSI)

angle of attack and stall warning/avoidance

OAT

GPWS

engine indication systems including:

temperature and pressure (including thermocouples, sensors and transmitters)

speed including mechanical and electric tachometers

thrust including fan, propeller and jet

torque

fuel flow

vibration

auxiliary transmitter/indicator measuring systems including:

hydraulic pressure and temperature

pneumatic pressure

transmission oil pressure and temperature

fuel remaining/used

fuel quantity indication

component position

remote compass systems

FDR systems

Applying relevant OHS practices

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 remove and install the components of aircraft basic and advanced instrument systems while observing all relevant safety and component handling precautions

Critical aspects for assessment and evidence required to demonstrate competency in this unit

It is essential that cleanliness requirements and safety precautions applicable to the system being maintained are fully observed, understood and complied with, as well as work practices associated with electrostatic sensitive devices.

Evidence of transferability of skills and knowledge related to removal and installation is essential. This is to be demonstrated by application across a range of aircraft instrument system components as listed in the Range Statement. An understanding of the attachment methods, connection of hardware, and the need for adjustment or calibration and system operation as they relate to the work must be demonstrated 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 at least one component from each of Groups 1 to 7 (Groups 6 and 7 may be omitted where not applicable to the enterprise) 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 workplace or simulated workplace using tools and equipment specified in maintenance manuals. It is also expected that general-purpose tools, test and ground support equipment found in most routine situations would be used where appropriate.

Method of assessment

Guidance information for assessment

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

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

Instrument components

Instrument components may be:

1. Pitot/static system components, ASIs, VSIs, air data system components, machmeters, altimeters including servo and encoding altimeters, angle of attack and stall warning/avoidance systems

2. Turn and slip, DGs, AHs, AHRS components (where applicable to enterprise), remote reading gyro compass system components and direct reading compasses

3. Turbine engine indication systems

4. Transmitter/indicator measuring instrument systems (pressure, temperature, position)

5. Fuel quantity indication and flow systems components

6. GPWS

7. FDR.

Application of this unit may relate to:

Scheduled or unscheduled maintenance activities

Individual or team related activities

Procedures and requirements

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

Unit sector

Aviation maintenance

This unit contains employability skills.