Module 7. Maintenance Practices (Part-66)

Content: Part-66 Module 7. Maintenance Practices

1. Safety Precautions-Aircraft and Workshop

• Aspects of safe working practices including precautions to take whenworking with electricity, gases especially oxygen, oils and chemicals.Also, instruction in the remedial action to be taken in the event of a fireor another accident with one or more of these hazards includingknowledge on extinguishing agents.

2. Workshop Practices

• Care of tools, control of tools, use of workshop materials;
• Dimensions, allowances and tolerances, standards of workmanship;
• Calibration of tools and equipment, calibration standards.

3. Tools

• Common hand tool types;
• Common power tool types;
• Operation and use of precision measuring tools;
• Lubrication equipment and methods.
• Operation, function and use of electrical general test equipment;

4. Avionic General Test Equipment

• Operation, function and use of avionic general test equipment.

5. Engineering Drawings, Diagrams and Standards

• Drawing types and diagrams, their symbols, dimensions, tolerances andprojections;
• Identifying title block information;Microfilm, microfiche and computerised presentations;
• Specification 100 of the Air Transport Association (ATA) of America;
• Aeronautical and other applicable standards including ISO, AN, MS,NAS and MIL;
• Wiring diagrams and schematic diagrams.

6. Fits and Clearances

• Drill sizes for bolt holes, classes of fits;
• Common system of fits and clearances;
• Schedule of fits and clearances for aircraft and engines;
• Limits for bow, twist and wear;
• Standard methods for checking shafts, bearings and other parts.

7. Electrical Cables and Connectors

• Continuity, insulation and bonding techniques andtesting;
• Use of crimp tools: hand and hydraulic operated;
• Testing of crimp joints;
• Connector pin removal and insertion;
• Co-axial cables: testing and installation precautions;
• Wiring protection techniques: Cable looming andloom support, cable clamps, protective sleevingtechniques including heat shrink wrapping, shielding.

8. Riveting

• Riveted joints, rivet spacing and pitch;
• Tools used for riveting and dimpling;
• Inspection of riveted joints.

9. Pipes and Hoses

• Bending and belling/flaring aircraft pipes;
• Inspection and testing of aircraft pipes and hoses;
• nstallation and clamping of pipes.

10. Springs

• Inspection and testing of springs.

11. Bearings

• Testing, cleaning and inspection of bearings;
• Lubrication requirements of bearings;
• Defects in bearings and their causes.

12. Transmissions

• Inspection of gears, backlash;
• Inspection of belts and pulleys, chains and sprockets;
• Inspection of screw jacks, lever devices, push-pull rod systems.

13. Control Cables

• Swaging of end fittings;
• Inspection and testing of control cables;
• Bowden cables; aircraft flexible control systems.

14. Material handling

• 14.1 Sheet Metal
  • Marking out and calculation of bend allowance;Sheet metal working, including bending and forming;
  • Inspection of sheet metal work.
• 14.2 Composite and non-metallic
  • Bonding practices;
  • Environmental conditions
  • Inspection methods

15. Welding, Brazing, Soldering and Bonding

• 15.1 Soldering methods; inspection of soldered joints.
• 15.2 Welding and brazing methods;
  • Inspection of welded and brazed joints;
  • Bonding methods and inspection of bonded joints.

16. Aircraft Weight and Balance

• 16.1 Centre of Gravity/Balance limits calculation: use of relevant documents;
• 16.2 Preparation of aircraft for weighing;
  • Aircraft weighing;

17. Aircraft Handling and Storage

• Aircraft taxiing/towing and associated safety precautions;
• Aircraft jacking, chocking, securing and associated safety precautions;
• Aircraft storage methods;
• Refuelling/defuelling procedures;
• De-icing/anti-icing procedures;
• Electrical, hydraulic and pneumatic ground supplies.
• Effects of environmental conditions on aircraft handling and operation.

18. Disassembly, Inspection, Repair and Assembly Techniques

• 18.1 Types of defects and visual inspection techniques;
  • Corrosion removal, assessment and reprotection.
• 18.2 General repair methods, Structural Repair Manual;
  • Ageing, fatigue and corrosion control programmes;
• 18.3 Non destructive inspection techniques including, penetrant,radiographic, eddy current, ultrasonic and boroscope methods.
• 18.4 Disassembly and re-assembly techniques.
• 18.5 Trouble shooting techniques

19. Abnormal Events

• 19.1 Inspections following lightning strikes and HIRF penetration.
• 19.2 Inspections following abnormal events such as heavy landings andflight through turbulence.

20. Maintenance Procedures

• Maintenance planning;
• Modification procedures;Stores procedures;
• Certification/release procedures;
• Interface with aircraft operation;
• Maintenance Inspection/Quality Control/Quality Assurance;
• Additional maintenance procedures;
• Control of life limited components.