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Elements and Performance Criteria

1. Inspect automatic flight control system and components
   • Isolation tags are checked and aircraft configured for safe system inspection and operation in accordance with the applicable maintenance manual
   • Automatic flight control system is visually or physically checked for external signs of defects in accordance with applicable maintenance manual
   • Defects are correctly identified and reported
2. Test/adjust automatic flight control system
   • Aircraft and system are prepared in accordance with applicable maintenance manual for the application of power/system operation
   • Automatic flight control system is functionally tested in accordance with maintenance manual for evidence of serviceability or malfunction while observing all relevant work health and safety (WHS) requirements
   • System calibration or adjustments are performed in accordance with maintenance manual, as appropriate
3. Prepare for troubleshooting
   • Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify an unserviceability
4. Troubleshoot automatic flight control system
   • Available information from maintenance documents and inspection and test results is used, where necessary, to assist in fault determination
   • Maintenance manual fault diagnosis guides and logic processes are used to ensure efficient and accurate troubleshooting to line replacement level
   • Specialist advice is obtained, where required, to assist with the troubleshooting process
   • Automatic flight control system faults are located and the causes of the faults are clearly identified and correctly recorded in maintenance documentation, where required
   • Rectification requirements are determined

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.
Automatic flight control systems include:	Flight director –indicators, computers, control boxes and interfaces with other systems Flight controls –servo actuators (roll, pitch, yaw and trim) computers and sensors Autopilot system –computers, sensors (gyros and/or accelerometers), controllers, mode selectors and system interface, control wheel steering (CWS), disconnect, go around and trim switches
Procedures and requirements include:	Industry standard procedures specified by manufacturers, regulatory authorities or the enterprise

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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:

applying relevant WHS practices

using approved maintenance documentation and aircraft publications relating to the automatic flight control and data system being maintained

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

flight director components and interface

flight control components and interface

flight data recorders and interface

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

testing systems to isolate system malfunctions and assess post-maintenance serviceability.

It is essential that system testing procedures, cleanliness requirements and safety precautions applicable to the automatic flight control 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 rotary wing automatic flight control systems and components 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 under the specified conditions of assessment, and include:

component attachment methods

explaining the basic layout (block diagram level), function and operation of:

flight director components and interface

flight control components and interface

flight data recorders and interface

explaining basic principles/functions relating to the above systems and associated with:

basic AC and DC circuit theory

digital fundamentals

analogue fundamentals

rotary wing flight theory

inner and outer loop control

rotary wing flight control system (mechanical, hydraulic and electro-mechanical types, trim and stabilisation)

flight control modes/channels

WHS requirements

system and component maintenance requirements and troubleshooting procedures

relevant maintenance manuals.

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