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Carrying out tests on aircraft passive warning and optical/surveillance systems

URN: SEMAE3137
Business Sectors (Suites): Aeronautical Engineering Suite 3
Developed by: Enginuity
Approved on: 2021

Overview

This standard identifies the competences you need to test aircraft passive warning and electronic optical/surveillance systems, in accordance with approved procedures. It covers both fixed wing and rotary winged aircraft, and includes passive warning and optical surveillance systems associated with acoustics, sound navigation and ranging (SONAR), radar homing and warning receivers (RHWR), collision and ground avoidance, wet, digital, video and infra-red cameras, recording and LASER systems, as applicable to the aircraft type.

You will be required to select the appropriate tools and equipment to use, based on the operations to be performed and the systems to be tested. The testing activities will include making all necessary checks and adjustments to ensure that components are correctly positioned and aligned and have the required range of movement, and will also include carrying out voltage checks, receiver sensitivity, range checks, video/media playback, built-in test equipment (BITE) tests, continuity checks, and functional checks.

Your responsibilities will require you to comply with organisational policy and procedures for the testing activities undertaken, and to report any problems with these activities that you cannot personally resolve, or that are outside your permitted authority, to the relevant people. You will ensure that all tools, equipment and materials used are correctly accounted for on completion of the activities, and that all necessary job/task documentation is completed, accurately and legibly. You will be expected to work with a minimum of supervision, taking personal responsibility for your own actions and for the quality and accuracy of the work that you carry out.

Your underpinning knowledge will provide a good understanding of your work and will provide an informed approach to applying appropriate testing techniques and procedures to aircraft passive warning and optical/surveillance systems. You will understand the passive warning and optical surveillance system under test, and its application, and will know about the tools and equipment used, and the testing requirements, in adequate depth to provide a sound basis for carrying out the activities, and for ensuring that the tested system performs to the required specification.

You will understand the safety precautions required when carrying out the testing activities and when using the associated tools and equipment. You will be required to demonstrate safe working practices throughout and will understand the responsibility you owe to yourself and others in the workplace.

Performance criteria

You must be able to:

  1. work safely at all times, complying with health and safety and other relevant regulations, directives and guidelines
  2. follow the appropriate procedures for use of tools and equipment to carry out the required tests
  3. set up and carry out the tests using the correct procedures and within agreed timescales
  4. record the results of the tests in the appropriate format
  5. review the results and carry out further tests if necessary
  6. leave the aircraft and the system in a safe and appropriate condition, free from foreign object debris on completion of the activities

Knowledge and Understanding

You need to know and understand:

  1. the specific safety practices and procedures that you need to observe when testing aircraft passive warning and optical/surveillance systems (including any specific legislation, regulations/codes of practice for the activities, equipment or materials)
  2. the importance of maintenance on, and impact upon (extended twin operations procedures) ETOpS systems, legislation and local procedures
  3. the health and safety requirements of the work area where you are carrying out the activities and the responsibility these requirements place on you
  4. the safety procedures that must be carried out before work is started on the aircraft
  5. the requirements and importance of understanding and applying human factors as defined by the regulatory requirements and the potential impact if these are not adhered to
  6. the protective clothing and equipment (PPE) to be worn and where it can be obtained

  7. hazards associated with testing aircraft passive warning and optical/surveillance systems, and with the tools and equipment used, and how to minimise them and reduce any risks

  8. what constitutes a hazardous voltage and how to recognise victims of electric shock

  9. how to reduce the risks of a phase to earth shock (such as insulated tools, rubber matting and isolating transformers)

  10. the correct operating procedures of the passive warning and optical/surveillance system being tested

  11. electrical bonding specifications and their importance
  12. how to extract and use information from engineering drawings and related specifications
  13. how to obtain the required test schedules and specifications for the system and aircraft type being tested, and how to check their currency and validity
  14. how to read and interpret the test schedules and specifications, and from whom you can seek assistance if you have problems or issues regarding the test schedules or specifications
  15. the methods and procedures to be used to carry out the various tests on the aircraft passive warning and optical/surveillance system components
  16. the importance of applying electrostatic discharge (ESD) procedures when working on sensitive equipment or devices
  17. the test equipment to be used, and its selection and application for particular tests 
  18. the calibration of test equipment (where applicable) and the requirement for currency/issue checks
  19. the techniques, methods and procedures to be used during the tests why tool/equipment control is critical and what to do if a tool or piece of equipment is unaccounted for on completion of the activities
  20. the principle of operation of the passive warning and optical/surveillance system under test and the function of the individual components within the system
  21. the importance of carrying out the tests in the specified sequence, checking all readings, movements and levels at each stage
  22. from whom to seek authorisation if you need to alter or change the test procedures
  23. how to record the results of each individual test and the documentation that must be used for this
  24. how to analyse the test results and how to make valid decisions about the acceptability of the system
  25. the procedures to be followed if the equipment or system fails to meet the test specification
  26. problems that can occur with the testing activities and how they can be overcome
  27. the problems that may cause errors or discrepancies with the test results and how to avoid these
  28. any required environmental controls relating to the testing
  29. the documentation to be completed at the end of the testing activities
  30. the extent of your own responsibility and to whom you should report if you have problems that you cannot resolve

Scope/range

Scope Performance

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  1. Carry out all of the following during the testing of the aircraft passive warning and optical/surveillance systems:

    1. obtain and use the appropriate documentation (such as job instructions, aircraft passive warning and optical surveillance test procedures, quality control documentation, history sheets, flight logbook, aircraft standards and specifications)
    2. adhere to procedures or systems in place for risk assessment, COSHH, personal protective equipment and other relevant safety regulations and procedures to realise a safe system of work
    3. provide and maintain a safe working environment for the testing activities
    4. obtain the correct tools and equipment for the activity, and check that they are in a safe, tested and usable condition and within current calibration date
    5. obtain clearance to work on the aircraft, and observe all relevant isolation and safety procedures
    6. ensure that safe working distance procedures are set up (where appropriate)
    7. where appropriate, apply electrostatic discharge (ESD) protection procedures
    8. carry out the tests using the specified techniques and procedures
    9. make any permitted adjustments to components and equipment, to bring the system to the specification requirements
    10. return all tools and equipment to the correct location on completion of the testing activities

  2. Carry out testing on three of the following aircraft passive warning and optical/surveillance systems:

    1. acoustics                      
    2. collision avoidance       
    3. video/media recording systems
    4. air data recording             
    5. ground avoidance         
    6. LASER systems
    7. cockpit voice recording systems              
    8. radar homing and warning receivers (RHWR)
    9. sound navigation and ranging (SONAR)
    10. camera systems (wet film, digital or infra-red)

  3. Test aircraft passive warning and optical/surveillance systems, using five of the following:

    1. oscilloscopes                                        
    2. signal generators
    3. multimeter                                       
    4. 'special-to-type' test equipment
    5. bonding tester                               
    6. inclinometer
    7. external power source (electrical/hydraulic)     
    8. video playback equipment
    9. internal power source (electrical/hydraulic)   
    10. photographic developers
    11. voltage standing wave ratio (VSWR) equipment

  4. Carry out six of the following types of test/check:

    1. voltage standing wave ratio (VSWR) checks
    2. bonding tests            
    3. continuity checks
    4. alignment checks                               
    5. voltage checks  
    6. 'special-to-type' tests
    7. soak test                                   
    8. range checks    
    9. receiver sensitivity
    10. functional check                         
    11. BITE test            
    12. video/media playback
    13. safety interlock checks                       
    14. signal injection tests    
    15. photographic development

Including the following:
16. a full system test that incorporates three of the above tests

  1. Carry out tests in compliance with one of the following:

    1. Civil Aviation Authority (CAA)/European Aviation Safety Agency (EASA)
    2. extended twin operations procedures (ETOpS) (where appropriate)
    3. Ministry of Defence (MoD)
    4. Military Aviation Authority (MAA)
    5. Aerospace Quality Management Standards (AS)
    6. customer standards and requirements
    7. Federal Aviation Authority (FAA)              
    8. company standards and procedures
    9. BS, ISO or BSEN standards and procedures  
    10. specific system requirements
    11. aircraft manufacturer's requirements

  2. Complete the relevant paperwork, to include one from the following, indicating the results of the tests and pass it to the appropriate people:

    1. computer records
    2. test records
    3. job cards
    4. aircraft service/flight log
    5. aircraft log
    6. permit to work/formal risk assessment

Scope Knowledge

Values

Behaviours

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You will be able to apply the appropriate behaviours required in the workplace to meet the job profile and overall company objectives, such as:

  • strong work ethic
  • positive attitude
  • team player
  • dependability
  • responsibility
  • honesty
  • integrity
  • motivation
  • commitment

Skills

Glossary

Links To Other NOS

External Links

Version Number

3

Indicative Review Date

2024

Validity

Current

Status

Original

Originating Organisation

Enginuity

Original URN

SEMAE3137

Relevant Occupations

Engineer, Engineering, Engineering and Manufacturing Technologies, Engineering Technicians

SOC Code

5234

Keywords

Aeronautical; engineering; aircraft passive warning; optical/surveillance systems; SONAR; RHWR; LASER systems