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About two measures for overrun prevention in Volga-Dnepr Group

About two measures for overrun prevention in Volga-Dnepr Group. Valeriy Sharov , Deputy Director of Flight Accident Prevention Department v.sharov@volga-dnepr.com. Content. 1 . Research work for finding correlation between Russian Friction Coefficient and Canadian Runway Friction Index

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About two measures for overrun prevention in Volga-Dnepr Group

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  1. About two measures for overrun prevention in Volga-Dnepr Group Valeriy Sharov, Deputy Director of Flight Accident Prevention Department v.sharov@volga-dnepr.com

  2. Content 1. Research work for finding correlation between Russian Friction Coefficient and Canadian Runway Friction Index • Why it was important for us • Participants and methodology • Conducting of measurements • Results 2. Development of the special software for detection of "dangerous landings” • Idea of the method • The program interface and how it is used 3. Conclusion

  3. VOLGA-DNEPR GROUP includes two cargo airlines: Volga-Dnepr and AirBridgeCargo Volga-Dnepr Airline fleet Ten AN-124-100 Four IL- 76-TD-90-VD AirBridgeCargo Airline fleet Twelve Boeing -747: - one B747-300F, - five B747-400ERF, - three B-747-400F, - two B-747-8F. Volga-Dnepr flies to more than 1000 airports of 140 countries

  4. Overrun prevention has always been one of our main concerns because: • Several incidents of overrun with An-124-100 occurred from 1996 to 2007, all of them in Canada; • In all cases there was non sufficient pilot’s awareness of RW conditions; • There is no international standard for friction characteristics for RW surface conditions (Airport Services Manual. Doc. 9137, ICAO, 2002); • Pilots of Russian made aircraft have to transform friction indexes into Russian Standard Friction Coefficient to perform calculations according to AFCM. Windsor, 2000 Trenton, 1996 Gander, 1997 Gander, 2007

  5. Different systems of measurement and presentation information of RW conditions Canada: Aircraft Movement Surface Reporting includes the description of RW surface and digital Canadian Runway Friction Index –CRFI Aeronautical Information Manual TP-14371E, Transport Canada, 2007.) CRFI is measured by Electronic Decelerometer mounted on a special vehicle RF:description of RW surface and digital Standard Friction Coefficient-SFC(Civil Airport OM of RF Moscow, 1995). SFC can be measured by: • friction trolley ATT-2; • decelerometer ; • braking time or distance Several types of conflicting SFC/CRFI tables had been used in Russian airlines. In 2008 we decided toto clarify the situation in cooperation with …

  6. Gromov Flight Research Institute (FRI) and Gander International airport Specialists of Gromov FRI Daniel Byrne, Brian Hicks, Safety Senior Aerodrome Manager, (left) Inspector V.Sharov, Volga-Dnepr Dr. M. Pavlov, head of the research T. Zakharova, engineer

  7. Measurement procedures We failed to bring ATT-2 to Gander. Taking into account time limitation special methodology of measurements was developed and during 4 days 10 sets (175 runs) were executed TES MK-3 TES MK-3

  8. Results: CRFI/ SFC Correlation Within accuracy required for flight operation SFC=CRFI. Documented in OM We informed CAA RF & Transport Canada

  9. Overrun probability assessment in successful landing • Overrun – accidental event with non zero probability in every landing P [(D1+D2+D3)>LDA] >0 Full stop Beginning of use of wheel brakes RW threshold Touchdown point 50” (15м) D1 D1 D2 D3 LLDA D1 – воздушный участок D2– промежуточный участок D3 – участок торможения • D1 and D2 taken from FDM and only D3 is a random value. • Monte-Carlo method with number of modeling landings n=100000. • Levels of excessive probability: MEDIUM – HIGH - • If probability exceeds limitation – it is a “risky landing”.

  10. Algorithm of the program based on results of Canadian research of 1996-99 WGT Vbr FDM Ltd Lbr RW Wind Overrun probability Calculate The program finds “risky landings”

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