Maintenance ManagersConference

2015

Maintenance ManagersConference

2015

Rich Bean

• 28 Years in Aviation

• 21 Years Active Duty Military

E&E Technician

QA

Field Instructor

• Director, Operations

1:30 pm – 2:20 pm

Session Time

Electrical Wiring Interconnect SystemEWIS

EWIS

Discussion Points

• What is Electrical Wiring Interconnect System(EWIS)?

• History

• Training

• Best Practices

• NextTech

• Summary

EWIS

• What is EWIS?

• The Electrical Wiring Interconnect System or“Electrical system” means those parts of the aircraftthat generate, distribute and use electrical energy,including their support and attachments

History

• In the late 1990’s wiring concerns were raised due toaccidents and incidents (TWA 800 mid-air explosion,Swiss Air 111 electrical arcing from an inflightentertainment system)

• These disasters prompted the review of commercialwiring policies and the formation of Aging TransportSystems Rulemaking Advisory Committee(ATSRAC) as well as small business fundedopportunities by the FAA, NASA, NAVAIR and others

Investigation

• ATSRAC Investigated 5 areas (phase I)

Fleet Condition

Fleet Service History

Maintenance Criteria

Standard Practices for Wiring

Inspection and Repair Training

• Investigation, findings and recommendationschanged the way we view EWIS

Investigation

• EWIS systems should be treated as a system

• General findings identified wiring is effected by:

Design

Maintenance

Repair

Environment

Age

Training

• Wiring is not immortal and degrades over time

Degradation

• EWIS Degradation is a process that is a function ofmany variables:

Age

Environment

Physical properties

Installation

Maintenance

Degradation

• Causes of EWIS Degradation

Time

Vibration

Moisture

Maintenance

Indirect damage

Chemical contamination

Heat

installation

Best Practices

• How do we apply the lessons learned to ensure one ofthe most critical systems (EWIS) is being properlymaintained and inspected?

• Training AC 120-94

• EWIS Best Practices Job Aid

• Standard Wiring Practice Manual

Training

• Developing a Training Program (AC 120-94)

Objective is to help organizations standardize anEWIS training program that ensures properprocesses and procedures when performingmaintenance, preventive maintenance and repairof EWIS

Developed for eight different target groups

Essential elements for the training program:

• Train to the appropriate level by providinginitial and refresher training

Training

• Target Groups 1-4

Group 1: Personnel performing EWISmaintenance

Group 2: Personnel performing EWISinspections

Group 3: Personnel performing EWISengineering on in-service aircraft

Group 4: Personnel performing generalmaintenance / inspections not involving EWIS

Training

• Target Groups 5-8

Group 5: Personnel performing otherengineering or planning work on in-serviceaircraft

Group 6: Other service staff with duties inproximity to EWIS

Group 7: Flight Deck Crew

Group 8: Cabin Crew

Training

• EWIS Curriculum

Module A: General EWIS practices

Module B: Wiring practices documentation

Module C: Inspection

Module D: Housekeeping

Module E: Wire

Module F: Connective devices

Module G: Connective devices repair

• Module C: Inspection

General visual inspection (GVI)

Detailed inspection (DET)

Special detailed inspection (SDI)

zonal inspection criteria and standards

Group 1 Training

• Module C: Inspection Cont.

Human factors in inspection

Zonal areas of inspection

Wiring system damage

Group 1 Training

Group 1 Training

• Module D: Housekeeping

Airplane external contamination sources

Airplane internal contamination sources

Other contamination sources

Contamination protection planning

Protection during airplane maintenance andrepair

Cleaning process

Group 1 Training

• Module E: Wire

Wire identification, type and construction

Insulation qualities and damage limits

Inspection criteria and standards for wire andwire bundles

Wire bundle installation practices

Group 1 Training

• Module E: Wire Cont.

Typical damage and areas found

Maintenance and repair procedures

Sleeving

Unused wires-termination and storage

Electrical bonding and grounding

Best Practices

• Aircraft Maintenance Manual

• Aircraft Standard Wiring Practices Manual

• FAA Aircraft Wiring Practices Job Aid

Federal AviationAdministration

AircraftWiringPractices(Job Aid)

NextTech What is the future for Aviation Technicians

Complex systems

Advanced Skill Requirements

Highly Integrated EWIS systems

SUMMARY

EWIS History

Organizational Training

Best Practices

NextTech

Nice picture with music

Thank you!