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Elements and Performance Criteria

1. Prepare for troubleshooting
   • Relevant maintenance documentation and modification status, including system defect reports, where relevant, are used to identify an unserviceability
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. 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:	Automatic pilot Flight director Automatic trim Yaw damper Automatic throttle and automatic landing (where applicable to the enterprise)
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 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

automatic throttle components and interface (where applicable to the enterprise)

automatic pilot system 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

performing system testing 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 testing and troubleshooting is essential. This is to be demonstrated through application across a range of aircraft 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 and include knowledge of:

component attachment methods

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

flight director components and interface

flight control components and interface

automatic throttle components and interface

automatic pilot system and interface

flight management system interface

navigation system interfaces

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

basic AC and DC circuit theory

digital fundamentals

analogue fundamentals

fixed wing flight theory

inner and outer loop control

fixed 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

relevant regulatory requirements and standard procedures.

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