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Graham Greene

Graham Greene. Chairman JAA Occupant Survivability Project Advisory Group. Anthropometric Research Study. JAA Study Background Increasing body dimensions (eg 17mm UK male height increase 1981-1995) plus increasing obesity concerns Longer duration flights Travelling population ageing.

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Graham Greene

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  1. Graham Greene Chairman JAA Occupant Survivability Project Advisory Group

  2. Anthropometric Research Study • JAA Study • Background • Increasing body dimensions (eg 17mm UK male height increase 1981-1995) plus increasing obesity concerns • Longer duration flights • Travelling population ageing

  3. Regulatory impact • Concerns expressed by airlines v concerns expressed by pax • No explicit regulations with the exception of the UK • Regulations need to be based on sound (scientific) advice together with cost-effectiveness studies

  4. Study Terms of reference • Comfort not an issue – very subjective • Seating must be able to safely accommodate pax • Other relevant matters – holistic approach

  5. Contract Award • Invitations in European Journal • ICE Ergonomics, Loughborough UK • Substantial experience in transport ergonomics • Anthropometric studies background • Nottingham University of Medicine

  6. Study Methodology • Questionnaire – check all issues covered • Review of AN64 – only existing standard • dimensions • computer models for ergonomics • Safety implications and health • One year duration

  7. Study Report • Questionnaire – brief, 300 pax, long(22hrs) and short haul (4hrs) • Ages up to 76 years, height to 6’6’’ • Around 30% ‘experienced problems’ with seat spacing • Confirmed importance of AN64 measurements and identified other issues

  8. Study Report • Expert appraisal by 3 ergonomists • SAMMIE ergonomics design system (CAD) – developed over 25 years for seating arrangements • Up-to date anthropometric data

  9. Conclusions 1 • Recommended that (AN64) Dimension A be increased from 26ins (660mm) to at least 28.2ins (711mm) to accommodate 95%ile European seated pax. • Note that a 99%ile European male would need a space of 31.3 inches (795mm)

  10. Conclusions 2 • Substantial list of seating dimensions building on AN64 for consideration eg lower leg/foot space/clearance envelope. • Explore value of ‘flip-up’ seat squabs

  11. Conclusions 3 • Support for comprehensive research on the effects of prolonged seating/ability to move. • Egress trials to validate some recommendations • Full report on JAA website www.jaa.nl

  12. Way Forward • Results to JAA Cabin Safety Steering Group for regulatory consideration • Formation of a Working Group, Work plan approved by C-JAA

  13. JAA Working Group • Review spacing recommendations • Implications of reduced mobility • Accident implications • Benefit to European flying population • Regulatory impact assessment • EASA responsibility

  14. Review spacing recommendations • Straightforward in principle – physical dimensions of populations • Judgements – eg. 95 percentile? • Value of other spacing definitions

  15. Implications of Reduced Mobility • Evacuation implications –very little published work • How important is the issue compared with other evacuation issues? • Pax health

  16. Accident Implications • Impact • Brace position • Upper torso restraint?

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