MEAAVI0045 — Maintain basic light aircraft instrument systems and components

Elements & performance criteria

Performance evidence

• maintain basic light aircraft instrument systems and components 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, air speed indicator (ASI), vertical speed indicator (VSI) and counter-pointer altimeters  directional gyros (DGs) and artificial horizons (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)  electronic flight and engine instrument system components (may be omitted if not relevant to the enterprise)  electrical systems indication (voltage and current)  basic fuel quantity indication systems and components  vacuum indication components
• locate and identify flight instrument system components during maintenance and 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 outside air temperature (OAT)
• locate and identified direct reading compasses during above maintenance
• correctly handle and use observed maintenance precautions relating to gyroscopes, gimbals and pitot or static systems (connections, heating and protrusions) during the above maintenance
• recognise system and component defects or external damage, correct installation, connection of plugs, terminations, attaching hardware, including cabling/harnesses, and security in each of the following:  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
• perform functional testing by applying logic processes, taking and interpreting system measurements and using test equipment and appropriate wiring diagrams and manuals to isolate malfunctions in the above systems and assess post-maintenance serviceability
• apply testing procedures, cleanliness requirements and safety precautions at all times, and as relevant to the system/s being maintained
• locate and identify at least one of the following:  electronic flight instrument system (EFIS)  engine indicating and crew alerting system (EICAS)  electronic central aircraft monitoring (ECAM)  data linkage and transmission systems

Knowledge evidence

• component attachment methods
• connection of hardware and plugs
• handling precautions for electrostatic sensitive devices
• work health and safety (WHS) practices for basic light aircraft instrument systems and components
• the basic layout (block diagram level), function and operation of:  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, including:  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 or static system leak testing
• maintenance documentation and maintenance publications for basic light aircraft instrument systems and components
• relevant regulatory requirements and standard procedures
• for electronic flight and engine instrument systems, including:  the layout and operation (to block diagram level) of EFIS, EICAS and ECAM systems and related data linkage and transmission systems  interpretation of display data  component removal and installation procedures  testing of system operation using on-board testing procedures and/or simple external test equipment with a go or no-go outcome  software management control requirements.

Foundation skills

• Reading: Reading skills to interpret maintenance manuals, inspection procedures and specifications (allowable limits).
• Writing: Writing skills to record and report on defects and faults and their causes.
• Numeracy: Numeracy skills to interpret and communicate technical information and take and interpret system measurements and instrument displays.

Unit content sourced from training.gov.au — © Commonwealth of Australia, licensed under CC BY 4.0. Auditori is not affiliated with the Department of Employment and Workplace Relations.

Questions about assessing MEAAVI0045