WHAT IS AVIONICS? A Presentation at the WAMEA Meeting Jock McTavish - 23 Mar 2007

1

WHAT IS AVIONICS?

A Presentation at the WAMEA MeetingJock McTavish - 23 Mar 2007

22

The Vanishing Specialty - 1

• Aviation technology has developed over the last few decades into a family of specialized technologies and trades and companies – leading to our current rules for AMEs and AMOs.

• Indeed the CARs replaced the older system partly because of the emergence of the new and inter-related trades.

• Change is again disturbing this equilibrium.

33

Some Avionics HistoryHere are some cockpits that tell the story.

• Once there were no avionics.• Then a little avionics showed up.• Then avionics filled up the available space.• Then avionics started getting smaller.• Presently, avionics is integrated into most of

the aircraft systems.

1212

The Glass Cockpit• A revolution in cockpit display concepts

has occurred. Designers have blended ideas from airline flight decks and the computer industry.

• What's unique is the integration of virtually all aircraft functions, including non-avionics systems … funneled through the glass displays.

1717

Definitions of Avionics

• Surprisingly there isn’t a clear definition. Just various sensible attempts to describe present applications of electronics to aviation.

• Before we consider the Canadian situation, let’s see what some authorities say.

- FAA, EASA, EIA, NASA, and Wikipedia. - and a practical definition from BAAE.

1818

Electronic Industries Association

• Avionics is not defined by EIA, but “System” is, and systems are a basic consideration in the engineering of aviation.

• A System is the composite of equipment, material, computer software, personnel, facilities and information/procedural data that satisfies a user need.

1919

Wikipedia• Avionics literally means aviation electronics. It

comprises all electronic systems designed for use on an aircraft.

• This includes communications, navigation and the display and management of multiple systems.

• It also includes systems as various as a search light for a police helicopter to a tactical system for an Airborne Early Warning.

2020

BAAE Avionics Repair Centre - Cardiff

• Avionics is broadly defined now. • In addition to the usual flight deck systems for

navigation, communication, collision and terrain avoidance, and instrumentation, it now includes equipment for the galley and cabin, including passenger entertainment systems and test equipment, headsets, defibrillators, cabin sales computers and lights.

2121

FAA• Avionics and electrical systems cover a broad

discipline of engineering that represents dramatic advances in modern science and technology.

• Navigation systems that operate on satellite signals, enhanced and synthetic vision that is completely constructed from electrical and infrared sensors, and aircraft performance controlled by digital electronics are examples.

2424

NASAAvionics Generic Architecture Definition

Faced with the pervasive nature of avionics, NASA decided avionics was the primary engineering perspective for control systems and subsystems but would exclude sensors, effectors and hardware systems outside a given boundary in a given situation. The next slide is a graphic of this boundary method of definition.

2727

Electronic Change Rate• Avionics changes simply because

electronics changes not even at a linear but a logarithmic rate.

• “Moore’s Law” has become the expression of this rapid change.

“Each 18 months, electronics becomes twice as capable and half as expensive.”

2828

Accelerating Change• Ray Kurzweil is a futurist and respected inventor

(Scanners and OCR). He points out to us that biology evolves and technology changes at an exponential rate. This is very counter-intuitive, for we exist in, and think in, linear time.

• This is precisely the difficulty between planners and regulators (linear thinkers the lot) on the one hand and those living with technical realities of accelerating change.

• Here then are some graphs from Kurzweil to illustrate the log/linear nature of change.

3333

The smallest transistor University of Manchester scientists have made a

transistor of carbon 1 atom thick that switches one electron. But Isn’t carbon a Structures thing?

3434

TCCA - CAR 571.10Maintenance Release

5. No person shall sign a maintenance release in respect of specialized maintenance unless the requirements of section 571.04 have been met.

3535

TCCA - CAR 571.04Specialized Maintenance No person shall perform the

specialized maintenance set out in Schedule II … except IAW an MPM of an approved AMO.

3636

TCCA - CAR 571 Schedule II

Specialized Maintenance• Here are listed the definitions for all the

specialties including avionics. • They are definitions by exceptions, and so

confusing and easily outdated.

3737

Avionics Is & Isn’t1. The repair of avionics components and

systems is avionics specialized maintenance, except for:

a. repairs of wiring and connectors;

replacement of:b. connectors and electrical components; c. antennasd. integral fuses and lighting components

3838

Avionics Isn’te. replacement of an avionics LRU

provided that any testing required can be done using standard test equipment, built-in test equipment (BITE) or equipment specified in the aircraft manufacturer’s instructions for continuing airworthiness;

3939

Avionics Isn’tf. on-site management of passenger

entertainment systems performed in accordance with the applicable instructions in the maintenance manual of the aircraft or systems manufacturer or the manufacturer’s instructions for continuing airworthiness; and

4040

Avionics Isn’tg. routine maintenance that is described

in the aircraft manufacturer’s maintenance manual or instructions for continuing airworthiness or performed in accordance with currently recognized industry practices for service in the field.

4141

Avionics Is2. Any avionics system installation or

modification is avionics specialized maintenance except for:(a few odd things befitting small aircraft)

Whether STC or LSTC or SB or AMM.

4242

Non-Required Avionics• Now there's a strange term. • It’s wiggle room for new technologies not involved

directly in support of the aircraft. • Things not essential. Optional helps. • Items with enough purpose to be in the aircraft

but not so much as to concern the regulators. • Includes computers, Electronic Flight Bags,

Radios for other than aircraft nav/com, entertainment, customer or mission electronics.

4444

The Vanishing Specialty - 2

• Electronics is now pervasive in every field of engineering.

• Avionics is a specialty that is dissolving at its traditional boundaries.

• Technically avionics maintenance is becoming associated with every aircraft system.

• Regulation wise, avionics is disappearing, as a clear distinct act of maintenance.

4545

Practical Example• Avionics clearly MEANS to include Air Data

and Transponder Testing and Recertification.• Under the CARs, on older aircraft like Malibu,

Dash 8 or Falcon 20, such work IS avionics. Because the task IS NOT described in the aircraft continuing airworthiness data.

• Yet, on newer aircraft like Meridian, CRJ or Falcon 700, such work IS NOT avionics because the task IS described in the aircraft CAW data.

4646

Where Now?• When specialties were recognized in aviation

it was primarily to make the person who did the work responsible for the work and the AMO he/she worked for, responsible for the release of that work.

• It breaks the chain of accountability for Specialty AMO’s not to be accountable for release of their workers.

4747

What is Avionics?• Avionics is the acquisition,

communication, processing, storage and display of data; and the interface and control of aviation systems.

• It is that work of maintenance and modification and also it’s release.

WHAT IS AVIONICS? A Presentation at the WAMEA Meeting Jock McTavish - 23 Mar 2007

Documents

Transcript of WHAT IS AVIONICS? A Presentation at the WAMEA Meeting Jock McTavish - 23 Mar 2007