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Upgrading Your Jet Aircraft?

The rational that regulatory bodies use to develop requirements for adding or upgrading avionics…

Ken Elliott   |   22nd December 2016
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Ken Elliott Ken Elliott

Ken Elliott is an avionics veteran of 40 years and more recently has focussed on NextGen. His...
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From his experience on numerous advisory committees within government and private industry, Ken Elliott explains the laborious process of determining what equipment a jet must have to participate in airspace throughout the globe.

Regulatory authorities specify the rules by which aircraft can be operated within their flight regions. While regulations related to flight safety tend to be relatively stable, rules requiring equipment move as technology enables improved airspace management to accommodate an ever-increasing demand for transportation by air.

In the US, for example, increased traffic above FL290 led the Federal Aviation Administration to implement Required Vertical Separation Minima (RVSM), which specified equipment selection and certification procedures that enabled a reduction in vertical separation from 2,000 feet to 1,000 feet between FL290 and FL410 by January 20, 2005. Prior to the imposition of RVSM requirements, which began in the late 1990, the accuracy of altimetry was insufficient to safely reduce vertical separation of aircraft at the upper flight levels.

An increase in air traffic throughout European airspace led  EUROCONTROL to require the equipage of Controller Pilot Data Link Communication (CPDLC) capability for all new aircraft flying in European airspace after January 1, 2014, made possible in large part by advances in Very High Frequency datalink (VDL Mode 2) capabilities.

The requirement that nearly all aircraft must have Automatic Dependent Surveillance-Broadcast Mode (ADS-B-Out) by January 1, 2020 reflects a technology capable of decreasing the cost of ATC facilities.

Equipage mandates may be frustrating to Directors of Aviation and aircraft owners. Operations across the North Atlantic and to destinations in Europe that were well within the capabilities of the company aircraft in the past become unauthorized by ATC due to equipage issues, and the restoration of capability demands investments in upgrades or added avionics.

Take heart! Mandates are the result of careful thought by involved operators and dedicated government authorities working together to facilitate the safe and efficient flow of air traffic.

Operator Involvement & Eventual Consensus

For now, consensus is formed by participants from industry and contributed to by government representation. Various forums exist where everyone takes off their day job hat to focus solely on the best outcome for establishing a needed requirement. Many hours are spent by committee members working voluntarily. International representation is primarily from North America and Europe, with a sprinkling of others in the room. This process should and will expand to emerging economies later.

Authorities controlling the aviation industry prefer to term “requirements” as simply “guidance”.

There is some merit in that—at the end of the day, guidance is used to set the standard by which a certification or operational approval is granted.

It is important to understand that consensus-based guidance is developed and published as a technical standard for the development of a product. At the same time, operational guidance is developed to facilitate a product’s use in the aircraft’s flight environment by flight crews.

The following list covers representative technical guidance materials under consideration. For the most part, this represents aviation electronics-electrical aspects, as developed by RTCA (Radio Technical Commission for Aeronautics), an organization originally formed in 1935.

RTCA Special Committees currently developing standards:

  • SC-236 Standards for Wireless Avionics Intra-Communication System (WAIC) within 4200-4400 MHz;
  • SC-235 Non-Rechargeable Lithium Batteries;
  • SC-234 Portable Electronic Devices;
  • SC-233 Addressing Human Factors/Pilot Interface Issues for Avionics;
  • SC-231 TAWS;
  • SC-230 Airborne Weather Detection Systems;
  • SC-229 406 MHz Emergency Locator Transmitters (ELTs);
  • SC-228 Minimum Operational Performance Standards for Unmanned Aircraft Systems;
  • SC-227 Standards of Navigation Performance;
  • SC-225 Rechargeable Lithium Batteries and Battery Systems;
  • SC-224 Airport Security Access Control Systems;
  • SC-223 Internet Protocol Suite (IPS) and AeroMACS;
  • SC-222 AMS(R)S;
  • SC-217 Aeronautical Databases;
  • SC-216 Aeronautical Systems Security;
  • SC-214 Standards for Air Traffic Data Communication Services;
  • SC-213 Enhanced Flight Vision Systems & Synthetic Vision Systems;
  • SC-209 ATCRBS & Mode S Transponder;
  • SC-206 Aeronautical Information and Meteorological Data Link Services;
  • SC-186 Automatic Dependent Surveillance-Broadcast;
  • SC-159 Global Positioning System;
  • SC-147 Traffic Alert & Collision Avoidance System;
  • SC-135 Environmental Testing.

Other RTCA Committees include:

  • Drone Advisory Committee (DAC);
  • NextGen Advisory Committee (NAC)

Business Aviation Mandates

Identifying work on technical guidance material, focused on the aircraft and aviation in general, the next list is developed by the SAE (Society of Automotive Engineering), specifically by its International Aerospace sector. Note that SAE activity is so comprehensive that in aerospace alone, there are divisions of committees. One such (shown below) is centered on materials and another covers avionics. There are many more.

Two examples of the many SAE Aerospace Standards Divisions follow...

Aerospace Materials Division:

  • AMS AM Additive Manufacturing;
  • AMS AMEC Aerospace Metals and Engineering Committee;
  • AMS B Finishes Processes and Fluids Committee;
  • AMS CACRC Commercial Aircraft Composite Repair Committee;
  • AMS CE Elastomers Committee;
  • AMS D Nonferrous Alloys Committee;
  • AMS E Carbon and Low Alloy Steels Committee;
  • Editorial Committee;
  • AMS F Corrosion Heat Resistant Alloys Committee;
  • AMS G Titanium and Refractory Metals Committee;
  • AMS G8 Aerospace Organic Coatings Committee;
  • AMS G9 Aerospace Sealing Committee;
  • AMS J Aircraft Maintenance Chemicals and Materials Committee;
  • AMS K Non-Destructive Methods and Processes Committee;
  • AMS M Aerospace Greases Committee;
  • AMS Metals Multi-Committee;
  • AMS P Polymeric Materials Committee;
  • AMS P17 Polymer Matrix Composites Committee;
  • ASEC Aerospace Surface Enhancement Committee.

ASD Avionic Systems Division:

  • AS-1 Aircraft Systems and Systems Integration;
  • AS-2 Embedded Computing Systems Committee;
  • AS-3 Fiber Optics and Applied Photonics Committee;
  • AS-4 Unmanned Systems Steering Committee;
  • AS-5 Position, Navigation and Timing.

Next we offer a list of representative series of guidance, characteristics and specifications that primarily addresses data communication existing between airborne products. This list is developed by ARINC. Each numerical series below represents hundreds of carefully drafted documents.

ARINC Standards Document Series:

  • 400 Series: Includes guidelines for installation, wiring, data buses, databases, and general guidance.
  • 500 Series: Includes ARINC Characteristics defining analog avionics equipment still used in several wide-body legacy aircraft.
  • 600 Series: Specification and Reports defining enabling technologies that provide a design foundation for equipment specified per the ARINC 700 Series of digital avionics systems. Among the topics covered by Specifications are data link protocols.
  • 700 Series: Characteristics defining digital systems and equipment installed on current-model production aircraft. They include definitions of form, fit, function and interface for line replaceable units (LRUs) in a federated architecture.
  • 800 Series: Specifications and Reports defining enabling technologies supporting the networked aircraft environment. Among the topics covered in this series is fiber optics used in high-speed data buses.

These three independent sources of consensus based standards depicted above are the springboard for much of the background data used across the aerospace industry. Published data are used to develop and integrate products, as well as guide their use in flight. These data are fundamental to the many activities occurring throughout the global aviation community today.

Beyond this published guidance are several non-aviation commercial standards, used for the qualification of products, components and materials. Typically, these commercial recommendations and the components developed from them are common across multiple industries. A great example is the International Standards Organization (ISO) with over 250 technical committees, worldwide.

The Backbone of All We Do

The backbone aspects of technology development (guided by standards) are: software, hardware, individual technology performance, format of bus data, certification and finally flight operation. Developed standards form the basis of familiar industry documents and activities, such as:

  • Minimum Operational Performance Standards (MOPS), by RTCA;
  • Minimum Aviation Systems Performance Standards (MASPS), by RTCA;
  • Type and Supplemental Type Certificates (TC and STC), by FAA;
  • Document (as developed by RTCA) and a guidance for certification (DO), by RTCA;
  • Aerospace Standard (AS), by SAE;
  • Aerospace Information Report (AIR), by SAE;
  • Aerospace Material Specification (AMS), by SAE;
  • Aerospace Quality Standards (AS), by SAE;
  • Aerospace Recommended Practices (ARP), by SAE;
  • ARINC Standards.

In the spirit of globalization, new guidance material is initiated by a Terms of Reference (TOR) document, structuring the activity of a long-term committee. It is indeed long-term, because consensus-based documents are created through countless hours of sentence construction, where every word is carefully crafted.

This comprehensive approach ensures that the later development of products and their flight operation will be precisely what the industry requires, as well as safe to implement.

In the development and certification of products and aircraft, there are other key players beyond industry and government volunteers. Such organizational entities use standards material and act as facilitators, guiding our industry and its regulators in their exploratory path of innovation.

Specifically, these organizations exist as government entities, administrations and what are sometimes called “Dot Orgs”.

A visit to Washington, DC highlights the population of paid organizations that support (and lobby) government and to an extent industry, in their efforts. They are crucial to aviation, and although frequently working behind the scenes, facilitate product development. MITRE in DC is a significant participant in this regard, while NASA Langley simulates scenarios leading to guidance papers useful to the aviation sector. There are many others who operate in this way.

The same scenario plays out across the world with variations on structure. However, what is key to highlight, is the role of the International Civil Aviation Organization (ICAO), which is the branch of the United Nations that acts as the true Global torch bearer in both standards and certification.

From registration codes to emissions standards, ICAO covers most of the aviation sector. Although ICAO often leads the way, when it comes to aviation standards as well as operations and guidance material, the Organization usually follows the lead of the established committees mentioned above.

Private Jet Cockpit

Justification & Other Considerations

The end-product of all this work provides the basis for the new technology you see at the NBAA, EBACE, LABACE, ABACE and other shows. As you step aboard for your next flight, consider the depth of effort that is expended on the development of aircraft and systems, often voluntary.

Standards as guidance form the basis for the certification and operation of airports, traffic control, satellites, engines, airframes, cockpits and cabins.

The consensus process further guides the implementation of advanced technologies used to satisfy the requirements of NextGen (US) and SESAR (Europe). NextGen and SESAR are the platforms covering core technological and operational implementation, mapped out for aircraft and infrastructure over multiple year programs.

These core technologies are grouped under an ICAO term of CNS:

  • Communication (Data Communication - DataComm/FANS/CPDLC);
  • Navigation (Performance Based Navigation - RNP/WAAS-LPV/GBAS/4D Trajectory/Low Vision);
  • Surveillance (Automatic Dependent Surveillance - ADS-C/ADS-B/Tracking).

What to Expect

Throughout 2017, AvBuyer will be exploring the implementation of CNS and other technologies that satisfy the mandates and operational requirements of airspace regions throughout the globe. We will cover how mandates migrate to both pre-owned and new aircraft, and we will provide specific recommendations pertaining to upgrades, new aircraft implementations and operations.

However, none of these technologies, as certified equipment and aircraft, can be introduced without the efforts of RTCA, SAE, ARINC, ICAO, MITRE and NASA, along with many other industry enablers.

In the spirit of ‘the whole is greater than the sum of its parts’—the more aircraft equipped, the more airspace can function as an integrated whole. The workload of Air Traffic Controllers will be less and the stress on pilots reduced. On average, flight time and fuel use will also decline.

Corporate aircraft operators need to be assured that transport aircraft lobbyists do not sway the impact of NextGen/SESAR implementations in their favor. NBAA and others help to ensure equipage and operation requirements are fairly applied across the aviation sectors.

Summary

For all those who question, with justification, the requirements for new equipage, a consideration worth pondering is the depth of effort in product development. Published guidance is carefully constructed with both operators and pilots in mind. It is also developed with everyone’s interest best served, albeit with the odd sacrifice made here and there.

Hopefully, knowing the extent of technical due diligence and a systems approach serving global and national airspace interests, you will have one more check mark for a positive business case to upgrade.

Finally, Globalization (which often is forcing the need for mandates) will continue, including the beneficial tracking of all aircraft anywhere along with a fast-approaching Aviation Internet of Things (AIoT) and greater connectivity, the like of which has never been seen before. Aviation advancement will be served by carefully crafted standards, ensuring an exponential but safe growth in Business Aviation.

Read more about: Avionics | Avionics Mandates | Business Aviation Mandates

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