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Elements and Performance Criteria

1. Remove advanced aircraft instrument system components.
   • System is rendered safe and prepared in accordance with the applicable maintenance manual and isolation tags are fitted where necessary to ensure personnel safety.
   • Instrument component removal is carried out in accordance with the applicable maintenance manual.
   • Required maintenance documentation is completed and processed in accordance with standard enterprise procedures.
   • Removed components are tagged and packaged in accordance with specified procedures.
2. Install advanced aircraft instrument system components.
   • Instrument components to be installed are checked to confirm correct part numbers, modification status, serviceability and shelf life.
   • Physical installation of instrument components is performed in accordance with the applicable maintenance manual and regulatory requirements, ensuring appropriate adjustment/alignment is carried out.
   • System is reinstated to correct operational condition in preparation for testing, as necessary.
   • Required maintenance documentation is completed and processed in accordance with standard enterprise procedures.

Required Skills

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 remainingused component position ie flaps landing gear speed brakes doorpylon 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 pitotstatic 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 warningavoidance 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 transmitterindicator measuring systems including hydraulic pressure and temperature pneumatic pressure transmission oil pressure and temperature fuel remainingused fuel quantity indication component position remote compass systems FDR systems Applying relevant OHS practices

Evidence Required

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 to Groups and 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 generalpurpose tools test and ground support equipment found in most routine situations would be used where appropriate
Method of assessment
Guidance information for assessment

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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	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

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