Caa Paper 2002/04
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Safety Regulation Group CAA PAPER 2002/04 A Benefit Analysis for Cabin Water Spray Systems and Enhanced Fuselage Burnthrough Protection FAA Reference: DOT/FAA/AR-02/49 www.caa.co.uk Safety Regulation Group CAA PAPER 2002/04 A Benefit Analysis for Cabin Water Spray Systems and Enhanced Fuselage Burnthrough Protection Report prepared by R G W Cherry & Associates Limited Important Note The CAA has made many of the documents that it publishes available electronically (in addition to traditional printed format). Where practical, the opportunity has been taken to incorporate a clearer revised appearance to the documents. Any significant changes to the content of this document will be shown in the Explanatory Note. If no such changes are indicated the material contained in this document, although different in appearance to the previously printed version, is unchanged. Further information about these changes and the latest version of documents can be found at www.caa.co.uk. 7 April 2003 CAA PAPER 2002/04 A Benefit Analysis for Cabin Water Spray Systems and Enhanced Fuselage Burnthrough Protection © Civil Aviation Authority 2003 ISBN 0 86039 902 8 Published 7 April 2003 Enquiries regarding the content of this publication should be addressed to: Research Management Department, Safety Regulation Group, Civil Aviation Authority, Aviation House, Gatwick Airport South, West Sussex, RH6 0YR. The latest version of this document is available in electronic format at www.caa.co.uk, where you may also register for e-mail notification of amendments. Printed copies and amendment services are available from: Documedia Solutions Ltd., 37 Windsor Street, Cheltenham, Glos., GL52 2DG. CAA PAPER 2002/04 A Benefit Analysis for Cabin Water Spray Systems and Enhanced Fuselage Burnthrough Protection List of Effective Pages Page Date Page Date iii 7 April 2003 Appendix 1 22 7 April 2003 iv 7 April 2003 Appendix 1 23 7 April 2003 v 7 April 2003 Appendix 1 24 7 April 2003 vi 7 April 2003 Appendix 1 25 7 April 2003 1 7 April 2003 Appendix 1 26 7 April 2003 2 7 April 2003 Appendix 1 27 7 April 2003 3 7 April 2003 Appendix 1 28 7 April 2003 4 7 April 2003 Appendix 1 29 7 April 2003 5 7 April 2003 Appendix 1 30 7 April 2003 6 7 April 2003 Appendix 1 31 7 April 2003 7 7 April 2003 Appendix 1 32 7 April 2003 8 7 April 2003 Appendix 1 33 7 April 2003 9 7 April 2003 Appendix 1 34 7 April 2003 10 7 April 2003 Appendix 1 35 7 April 2003 11 7 April 2003 Appendix 1 36 7 April 2003 12 7 April 2003 Appendix 1 37 7 April 2003 13 7 April 2003 Appendix 1 38 7 April 2003 14 7 April 2003 Appendix 1 39 7 April 2003 15 7 April 2003 Appendix 1 40 7 April 2003 16 7 April 2003 Appendix 1 41 7 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Appendix 1 113 7 April 2003 Appendix 1 161 7 April 2003 Appendix 1 114 7 April 2003 Appendix 1 162 7 April 2003 Appendix 1 115 7 April 2003 Appendix 1 163 7 April 2003 7 April 2003 Page iv CAA PAPER 2002/04 A Benefit Analysis for Cabin Water Spray Systems and Enhanced Fuselage Burnthrough Protection Page Date Page Date Appendix 1 164 7 April 2003 Appendix 2 1 7 April 2003 Appendix 2 2 7 April 2003 Appendix 2 3 7 April 2003 Appendix 2 4 7 April 2003 Appendix 2 5 7 April 2003 Appendix 2 6 7 April 2003 Appendix 2 7 7 April 2003 Appendix 2 8 7 April 2003 Appendix 2 9 7 April 2003 Appendix 2 10 7 April 2003 Appendix 2 11 7 April 2003 Appendix 2 12 7 April 2003 7 April 2003 Page v CAA PAPER 2002/04 A Benefit Analysis for Cabin Water Spray Systems and Enhanced Fuselage Burnthrough Protection Contents Executive Summary 1 Introduction 2 Objectives 2 Assumptions 2 General 2 Burnthrough 3 Cabin Water Spray 3 Selection of Accidents 4 Data Sources 4 Accident Selection Criteria 4 Selection of Accidents for Analysis 4 Method 4 Assessment of Benefit for Each Accident 4 Assessment of Benefit for all Accidents Analysed 6 Assessment of Benefit for the World Fleet of Western Built Aircraft 8 Analysis and Results 9 Method 1 Statistical Modelling 9 Method 2 Rate of Occurrence Methodology 11 Discussion 13 Accuracy of Predictions 13 Assessment of Benefit for Enhanced Fuselage Burnthrough Protection 13 Assessment of Benefit for Cabin Water Spray Systems 14 Assessment of Benefit for Cabin Water Spray Systems in Combination with Enhanced Fuselage Burnthrough Protection 15 Flight Time Prior to the Accident 17 Conclusions 19 References 19 Definitions 20 Appendix 1 Accident Rationales Appendix 2 Summary of Benefit Assessment 7 April 2003 Page vi CAA PAPER 2002/04 A Benefit Analysis for Cabin Water Spray Systems and Enhanced Fuselage Burnthrough Protection Executive Summary A benefit analysis has been carried out to derive the life saving potential of a Cabin Water Spray system in conjunction with enhanced Fuselage Burnthrough Protection from large external pool fires.