Presentation is loading. Please wait.

Presentation is loading. Please wait.

Aero Certification and Engineering LLC - Proprietary & Confidential Regulatory considerations for wireless aircraft systems April 17, 2007.

Similar presentations


Presentation on theme: "Aero Certification and Engineering LLC - Proprietary & Confidential Regulatory considerations for wireless aircraft systems April 17, 2007."— Presentation transcript:

1 Aero Certification and Engineering LLC - Proprietary & Confidential Regulatory considerations for wireless aircraft systems April 17, 2007

2 Aero Certification and Engineering LLC - Proprietary & Confidential This presentation will give an overview of regulatory considerations in broadband wireless system design and installation onboard commercial aircraft. Alternative technologies may offer solutions which deliver the promise of an internet in the sky.

3 Aero Certification and Engineering LLC - Proprietary & Confidential Introduction Overview to the Wireless Interference Issues History of PEDs on Commercial Aircraft Past Regulatory Reviews & Findings Types of Potential Interference Theoretical & Practical Incident Reports & Experience Industry & Regulatory Activities Near-Term & Long-Term Outlook

4 Aero Certification and Engineering LLC - Proprietary & Confidential History of Wireless Interference Issues - Concern Over PEDs on Aircraft Is Not New 1963 – RTCA SC-88, Report DO-119 - Dealt with FM Radio Receivers Resulted in FAR 91.19 controlled use of PEDs. Recommended prohibiting radios in flight 1988 – RTCA SC-156, Report DO-199 - Concluded PED EMI Exists but Is Low - Recommended FAA Advisory Circular for PEDs - Recommended FCC change classification for PED RF output

5 Aero Certification and Engineering LLC - Proprietary & Confidential History of Wireless Interference Issues - Concern Over PEDs on Aircraft Is Not New 1996 – RTCA-177, Report DO-233 - Improved Aircraft Path Loss Factor Measurements - Changed FAR 91.21 to Prohibit PED Use During Critical Flight Phases 2003 – RTCA SC-202 - Deals with Wireless RF LANs and Cell Phones (Intentional Tx)

6 Aero Certification and Engineering LLC - Proprietary & Confidential The U.S. Regulatory Situation Dual Regulatory Agencies - Cell Phone and Wireless Devices on Aircraft are governed by FCC and FAA Regulations The FCC and the FAA Are Coordinating their Activities in Examining the Use of Wireless Devices Onboard Aircraft. The FCC and the FAA Are Seeking Technical Guidance in the Regulatory Process from Various Organizations – Notably NASA and RTCA

7 Aero Certification and Engineering LLC - Proprietary & Confidential Non-FAA Regulatory Developments in the U.S. FCC Re-Examining Its Ban on Inflight Cell Phone Use April 6, 2007 – the U.S. FCC is seeking public comment on whether to permit the airborne operation of "off the shelf" wireless handsets and other devices under the following conditions: a.) The device operates at its lowest power setting under control of a "pico cell," which is a very small specialized cellular base station installed onboard the aircraft; and b.) The operation does not interfere with on-ground users.

8 Aero Certification and Engineering LLC - Proprietary & Confidential Non-FAA Regulatory Developments (Continued) Good News for U.S. Passengers Demanding Voice & Data Connectivity (Parity with European Passengers) Opposition by Pilot and Flight Attendant Unions After FCC Comment Period, FCC Likely to Lift Cell Phone Ban Under the Conditions: a.) Only onboard pico-cell technology allowed b.) Subject to FAA and Airline approval Good News for AirCell, the U.S. ATG License Holder Voice Services Complement to Broadband Service Offering

9 Aero Certification and Engineering LLC - Proprietary & Confidential Q: Why Is There A Concern? A: The Potential for Interference In a Growing Variety of PEDs Brought Onboard. Note the Range of Devices for Which Interference Was Reported in a 9/2004 FAA Incident Report Summary Extracted From NASA-ASRS.

10 Aero Certification and Engineering LLC - Proprietary & Confidential Q: What Systems Are Affected? A: Many Different Systems Ranging From Non-Essential to Flight Critical, Including Navigational, This FAA Chart Depicts Interference Reports from 1995 to 2002.

11 Aero Certification and Engineering LLC - Proprietary & Confidential NASA ASRS PED Interference Reports 1995- 2002

12 Aero Certification and Engineering LLC - Proprietary & Confidential What Causes Interference to Avionics from PEDs and Wireless Devices? Coupling of PED emissions with avionics antenna or components acting as an Antenna. Antennas - Leakage Thru Windows, Doors, Seams Any Cable (including Seat-to-Seat Cabling) Power cables Power Supplies Poorly Shielded Circuit Board Components

13 Aero Certification and Engineering LLC - Proprietary & Confidential What Causes Interference to Avionics from PEDs and Wireless Devices (Continued)? What Are the Factors Affecting Coupling? Frequency of Emissions Fundamental Frequencies (including Harmonic Frequencies) Spurious Frequencies Power of Emissions Sensitivity of Avionics Device (Shielding Issue)

14 Aero Certification and Engineering LLC - Proprietary & Confidential Front-Door Coupling Emissions radiated by portable electronic devices can radiate to aircraft antennas through: Windows Cargo and passenger door seams Hatches Aircraft Radio Receiver Antenna Portable electronic device RF emissions Radio receiver

15 Aero Certification and Engineering LLC - Proprietary & Confidential Back-Door Coupling Emissions radiated by portable electronic devices can couple directly to aircraft wiring and avionics RF emissions from portable electronic device

16 Aero Certification and Engineering LLC - Proprietary & Confidential NASA Studies on Cell Phones, PEDs & UWB Devices Multiple Studies Performed – Bluetooth, 802.11, GSM, CDMA, GMRS and FRS Radios Cell Phones – Some Small (But Not Zero) Interference Detected. On/Off Triggered Highest Spurious Emissions Laptops & PDAs – Emissions Generally Benign But Some Exceedances of DO160D Category M Emission Limits For TCAS and DME Bands GMRS and FRS Radios – Very Noisy – Exceeded Laptops By As Much As 30dB

17 Aero Certification and Engineering LLC - Proprietary & Confidential Cabin Wireless LAN (CWLAN) Certification The FAA Has Issued Several STCs for CWLAN Systems for: Gulfstream & Dassault Falcon 2000 Bombardier Global Express B777-200/300 & B747-400 A330 & A340 B757 B737

18 Aero Certification and Engineering LLC - Proprietary & Confidential Ground Test & Flight Test Methodologies Conduct EMI Assessment to Determine if EMI Flight Test Is Required. If Required (Likely) Perform a front-door and back-door transmission test to Validate intentional system transmission levels. Identify Average and Maximum Number of PEDs in Use on Aircraft and Associated Operational and Failure Mode Power Levels.

19 Aero Certification and Engineering LLC - Proprietary & Confidential Ground Test & Flight Test Methodologies (Continued) All Frequency Bands Used by the CWLAN System Need to Be Evaluated Aircraft Location Tests Required from various locations in the cabin where PED usage is expected (galley, passenger aisles, etc.). Verify CWLAN System and PED equipment meets the current edition of RTCA/DO-160E section 21, Category M, emission levels.

20 Aero Certification and Engineering LLC - Proprietary & Confidential What Should an Airline or System/Component Manufacturer Do to Prevent Wireless Interference? 5 Step Approach Ensure That All System Components Pass DO-160E, Category M Have Experienced Electrical or Systems DER Review The Aircraft Installation Plan for Potential EMI Issues Make Sure Aircraft Wiring Diagram and Electrical Load Analysis are Up-To-Date (Verify Current AC Configuration) Consider Existing Aircraft Antennae Wire Routing Careful Consideration for Component Installation Location for Potential EMI Issue with Antennas or Avionics.

21 Aero Certification and Engineering LLC - Proprietary & Confidential Summary The FAA Recognizes There Is A Small Risk to Sensitive Radio systems from PEDs. Intentional Transmitters May Interfere With Some Aircraft Systems That Are Not Qualified to HIRF Requirements.

22 Aero Certification and Engineering LLC - Proprietary & Confidential Special Thanks To: Rolfe Goedecke- Airbus Industrie Kiko Brenneisen- FAA DER & DAR, Aero Certification Roger Modeen, FAA DER, Boeing (retired) Kreg Doerr – Aero Certification Rich Salter – Lumexis, WAEA TC Ioan Leuca, Ph.D. – formerly Connexion By Boeing Bill Straus, Ph.D. – NASA/DOT

23 Aero Certification and Engineering LLC - Proprietary & Confidential References In-Flight Radio Frequency Spectrum Measurements of Commercial Aircraft Cabins, DOT/FAA/AR-06/41 Office of Aviation Research and Development Washington, DC 20591, Bill Straus, Ph.D. and M. Granger Morgan, Ph.D. Recent Developments in Aircraft Wireless Networks, Obi Orjih, Washington University, May 9, 2006 Ultrawideband Electromagnetic Interference To Aircraft Radios, Ely, Jay (NASA); Fuller (Eagle Wings Inc.); Shaver, Timothy (United Airlines) Electromagnetic Interference Assessment of CDMA and GSM Wireless Phones To Aircraft Navigation Radios, Ely, Jay (NASA), Nguyen, Truong (NASA), Koppen, Sandra (Lockheed Martin), Salud, Theresa (Lockheed Martin) Guidance on Allowing Transmitting Portable Electronic Devices (T-PEDs) on Aircraft, RTCA DO-294, December 13, 2006


Download ppt "Aero Certification and Engineering LLC - Proprietary & Confidential Regulatory considerations for wireless aircraft systems April 17, 2007."

Similar presentations


Ads by Google