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ICAO Update- High Tire Pressure Revision to Annex 14 FAA Working Group Meeting

ICAO Update- High Tire Pressure Revision to Annex 14 FAA Working Group Meeting . Michael J. Roginski, P.E. Principal Engineer – Boeing Airport Technology, Pavement Lead April 21-23, 2012, Atlantic City, New Jersey. Work Structure of the ICAO Aerodromes Panel. Air Navigation Commission.

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ICAO Update- High Tire Pressure Revision to Annex 14 FAA Working Group Meeting

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  1. ICAO Update- High Tire Pressure Revision to Annex 14FAA Working Group Meeting Michael J. Roginski, P.E. Principal Engineer – Boeing Airport Technology, Pavement Lead April 21-23, 2012, Atlantic City, New Jersey

  2. Work Structure of the ICAO Aerodromes Panel Air Navigation Commission Aerodromes Panel Aerodromes Panel Working Group of the Whole (APWGoW) Aerodrome Design Working Group Visual Aids Working Group Rescue & Fire-fighting Working Group Airport Operations & Services Working Group Heliport Design Working Group • PSG - Pavement Sub-Group • FTF - Friction Task Force

  3. Origin of Proposal Proposal for Action Development Phase ANC First series of FAA/Boeing tests in 2005. Second series of tests and Airbus tests 2009-2010 timeframe ANC Panel Secretariat Divisional Meeting 0 - 5 years AN Study Group Technical Proposal Direct Submission ANC Preliminary Review Review Phase International Organizations Contracting States 3 Months Secretariat Validation Secretariat Analysis Current phase ANC Final Review ANNEX Adoption/ Publication Phase PANS 10 Months Approximately ANC Approves ANC Recommends Adoption Date Council Adopts (Usually March) 2 weeks Green Edition Green Edition 4 Months States States Effective Date (Amendment becomes effective if not disapproved by majority of States) Secretariat Notification of Differences PANS ANNEX 4 Months minimum Blue Edition Blue Edition Applicability Date Applicability Date Applicability Date (Usually November)

  4. Origin of Proposal Proposal for Action Development Phase ANC First series of FAA/Boeing tests in 2005. Second series of tests and Airbus tests 2009-2010 timeframe ANC Panel Secretariat Divisional Meeting 0 - 5 years AN Study Group Technical Proposal Direct Submission ANC Preliminary Review ● After completion of both the FAA/Boeing and Airbus high tire pressure tests technical reports were written to justify the proposed increase in the ICAO tire pressure categories used in the ACN/PCN system. ● Technical proposal drafted by the Pavement Sub-group (PSG) was presented by the Aerodromes Operations and Services Working Group (AOSWG) to the Aerodrome Panel (AP)- October, 2010. ● Aerodrome Panel approves- amendment to Annex 14, Volume 1, Aerodrome Design and Operations is required Current phase (Usually March) at (Amendment becomes effective if not disapproved by majority of States) (Usually November)

  5. Conclusions Increase in tire pressure had an insignificant effect on the amount of rutting, with the observed difference between 254 psi and 218 psi being in the range of 0-4%.. Test results indicate that rutting can be significantly reduced by using improved asphalt binders. Rut depth variation increases simultaneously with temperature independent of tire pressure. Both tests results clearly indicate that the tire pressure effect resulting from an increase from 1.5 MPa (218 psi) to 1.75 MPa (254 psi) will not affect adversely surface or base asphalt concrete layers, nor the structural capacity and life duration of typical airfield pavement structures. Page 5

  6. Review Phase ANC Preliminary Review May, 2011 SL 11-41 issued Review Phase International Organizations Contracting States 3 Months Secretariat Sept. 15, 2011 Comments received Validation Current phase Secretariat Analysis ANC Final Review ● Air Navigation Commission issues state letter SL 11-41 stating proposed changes to Annex 14, Vol 1- May 30, 2011. Start of review phase. ● Member states (191 total) and recognized international organizations (~10) are given 3 months to respond- Due date Sept. 15, 2011. ● Current status- ICAO Secretariat (Joseph Cheong) is collating and analyzing all responses received from member states and intl organizations. After coordination with various ICAO sections (i.e. Flight Ops, ATC, Aeronautical Information Services, etc) all analyses will be consolidated into a single Air Navigation Working Paper (ANWP).

  7. Comments Received • ● Responses received from 62 contracting states and 5 international organizations. • ● ICAO must respond to each and every comment. Note: ICAO provisions are minimum provisions, meaning that member states are free to adopt provisions more stringent in the interest of safety, regularity and efficiency. If ICAO were to mirror US requirements then ~ 90% of the world would not be able to comply. • ● Most comments received are in favor of revision to higher tire pressure categories. • Some exceptions: • Tests did not consider pavement types other than asphalt • Note making reference to potential damage to pavement due to higher tire pressures infers that if accepted as a standard then states will be mandated to implement a maintenance program to ensure safety. • PCN example for all up mass rating in annex 14 based on older 747-400. Possibly replacing with 747-8 or A380 is more practical. • ● Secretariat opinion is that the revision will be approved.

  8. Proposal Adoption Phase ● The ANC will review the ANWP prepared by the ICAO Secretariat-May/June of 2012. The ANC is comprised of experts nominated by 19 countries, acting as technical advisors to the ICAO Council. ● Adoption by the ICAO Council follows. Council consists of members nominated by 36 states, simple majority needed to go forward. ● Member states are given 4 months to register disapproval after adoption date. If approved by simple majority of states the proposal becomes ‘effective.’ If disapproved it’s ‘back to the drawing board’ ● Once approved (i.e. ‘effective’) then 4 additional months given before applicability date- estimated to be November, 2013. ANC Final Review ANNEX Adoption/ Publication Phase PANS 10 Months Approximately ANC Approves ANC Recommends May/June 2012-review of ANWP begins Adoption Date Council Adopts (Usually March) 2 weeks Green Edition Green Edition 4 Months Review by member states States States Effective Date (Amendment becomes effective if not disapproved by majority of States) Secretariat Notification of Differences PANS ANNEX Estimated November, 2013 4 Months minimum Blue Edition Blue Edition Applicability Date Applicability Date Applicability Date

  9. Annex 14, Vol 1 Chapter 2, section 2.6Revision to tire pressure categories Both the ACI airport survey and the full-scale tests demonstrate that the proposed change of tire pressure limitations can be ratified without putting aircraft or airfield pavement at risk. They allow the ICAO tire pressure limit codes to be formally and permanently changed to be more consistent with both the performance of real world pavement and new generation aircraft.

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