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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 while observing all relevant work health and safety (WHS) requirements
   • 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
3. Prepare for financial transactions
   • Float, goods and services are prepared in accordance with workplace policies and procedures
   • Point of sale is established to meet workplace requirements and standards
4. Promote products and services
   • Strategies to promote products and services are developed in accordance with workplace policies and procedures
   • Strategies to promote products and services are implemented in accordance with workplace procedures
5. Sell products or services
   • Product knowledge is applied when answering customer inquiries
   • Sales transactions are conducted in a courteous manner to the customer’s satisfaction
   • Price is correctly calculated and charged, and correct change and receipt are issued
6. Process refunds
   • Claim for refund is substantiated in accordance with company procedures
   • Refund claim application processes are completed to ensure transaction details are recorded
   • Refunds are correctly calculated and issued in a courteous manner
7. Reconcile financial transactions
   • Value of money and vouchers issued and refunded are calculated to enable reconciliation against total sales to validate cash on hand
   • Money, goods, service entitlements and reconciliation documents are secured in accordance with workplace requirements

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions can be found in the Companion Volume Implementation Guide.

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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:

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 and 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, i.e. flaps, landing gear, speed brakes and door/pylon locking

flight systems, including attitude, altitude, air speed, OAT and GPWS (where applicable to the enterprise)

locating and identifying direct reading compasses, remote compass system components (flux valve, gyro, amplifier and indicator), and AHRS components

locating and identifying FDR system components (where applicable to the enterprise)

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

applying relevant WHS practices.

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 Assessment Conditions.

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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 use of approved maintenance documentation and aircraft publications relating to basic and advanced 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 DG and AH (both air and electrically driven) and turn and slip, and AHRS

airspeed, including ASI, machmeters and air data systems

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

application of relevant WHS practices.

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