EWIS TG 4, 5 & 6 Initial

The aviation industry is continuously improving when it comes to safety.

As bad as it is, lessons are learned with every incident or accident, big or small. The cause of it is analyzed and procedures are drawn up or changed on the basis of this. One of the results of such an analysis can be that there is a need for training, to create or increase awareness for a certain matter for example. One such training is EWIS.

Following EWIS training is set mandatory by the aviation authorities. If you don’t follow this course, you won’t be allowed to practice your passion: working on the Aircraft.

This initial training is custom made to meet the requirements given by the aviation authorities for Target Group 4, 5 and 6.

Target Group 4: Qualified staff performing general maintenance/inspections not involving wire maintenance.

Target Group 5: Qualified staff performing other engineering or planning work on in-service aeroplanes.

Target Group 6: Other service staff with duties in the proximity of electrical wiring interconnection systems.

The training consist of the following modules:

• Module A: General EWIS Practices.
• Module C: Inspections.
• Module D: Housekeeping.
• Module E: Wire.

Detailed Learning Objectives and Topic Overview per Module

---

Module A: General EWIS Practices

Learning Objectives:

• Know the safety procedures of normal and non-normal maintenance procedures so that the person can protect himself/herself and the aeroplane.
• Recognize ESDS equipment and demonstrate standard anti-static procedures so that no damage occurs to that equipment.

Detailed Topic Overview:

1. Safety Practices
   • Current is lethal – first aid
   • Applying power to the aeroplane
   • Isolating the circuit
   • Aeroplane warnings
   • Human factors
2. ESDS device handling and protection
   • Sources of electrostatic discharge
   • Soft and hard failures
   • ESDS safety procedures
   • ESDS handling/packing procedures

---

Module C: Inspections

Learning Objectives:

• Know the different types of inspections: general visual inspection (GVI), detailed inspection (DET), zonal inspection and enhanced zonal analysis procedure (EZAP).
• Know the criteria and standards of inspection so that the person knows which tools are used to ensure inspection procedures and standards are achieved, which leads to all defects being found.
• Know the effects of fatigue and complacency during inspection and how to combat these effects (human factors).
• Know the specific zonal inspection requirements related to system affiliation and environmental conditions.
• Recognize typical wiring system damage, such as hot gas, fluid contamination, external mechanically induced damage, chafing, corrosion, signs of overheating of wire, wire bundles, connective and control device assemblies.

Detailed Topic Overview:

1. Special inspections
   • General visual inspection (GVI)
   • Detailed inspection (DET)
   • Zonal inspection
   • Enhanced zonal analysis procedure (EZAP)
2. Criteria and standards
   • Tools
   • Criteria/standards
   • Procedures of inspection
3. Human factors in inspection
   • Fatigue
   • Complacency
4. Zonal areas of inspection
   • Zonal areas of inspection
   • Zonal inspection procedures and standards
5. Wiring system damage
   • Swarf/FOD/metal shavings
   • External mechanically induced damage
   • Hot gas
   • Fluid contamination
   • Vibration/chafing
   • Corrosion
   • Signs of overheating

---

Module D: Housekeeping

Learning Objectives:

• Recognize external contamination and other damage due to external environmental conditions.
• Know the aeroplane internal contamination sources so that inspection processes can be effectively carried out and contamination damage easily recognized.
• Recognize other possible contamination sources.
• Know the planning procedures to be followed, on EWIS areas in different parts of the aeroplane.
• Know the protection procedures and processes to protect the EWIS during maintenance and repair.
• Know the process of cleaning wiring systems during maintenance and repair.

Detailed Topic Overview:

1. Aeroplane external contamination sources
   • De-ice fluids
   • Water and rain
   • Snow and ice
   • Miscellaneous (e.g. Cargo/beverage spillage)
   • Air erosion
2. Aeroplane internal contamination sources
   • Hydraulic oils
   • Engine and APU oils
   • Fuel
   • Greases
   • Galleys and toilets
   • Lint/dust
   • Bleed air and hot areas
   • Hazardous materials
3. Other contamination sources
   1. Paint
   2. Corrosion inhibitor
   3. Drill shavings/swarf
   4. Foreign objects (screws, washers, rivets, tools, etc.)
   5. Animal waste
4. Contamination protection planning
   • Have a plan/types of plan/area mapping
   • Protection and caution recommendations
   • Procedures
   • Keep cleaning
5. Protection during aeroplane maintenance and repair
   • Recommended general maintenance protection procedures
   • Recommended airframe repair protection procedures
   • Recommended powerplant repair protection procedures
6. Cleaning processes
   • Fluid contamination
     • snow and ice
     • de-ice fluid
     • cargo spillage
     • water and rain
     • galleys
     • toilets water waste
     • oils and greases
     • pressure washing
   • Solid contamination
     • drill shavings/swarf
     • foreign objects
   • Environmental contamination
     • lint and dust
     • paint
     • corrosion inhibitor
     • animal waste

---

Module E: Wire

Learning Objectives:

• Know typical damage that can be found.
• Know the correct installation practices for electrical bonds and grounds.

Detailed Topic Overview:

1. Typical damage and areas found
   • Vibration
   • Heat
   • Corrosion
   • Contamination
   • Personnel traffic passage
2. Electrical bonding and grounds
   • Inspection standards
   • Primary bonding (HIRF protection)
   • Secondary bonding (system grounding)
   • Lightning strikes

---