1. Comparing Runway Excursion Factors
 Scott R. Winter, Steven M. Leib, Robert C. Geske, Tyler B. Spence, Lauren A. Sperlak, Lukas Rudari, Craig D. Cestari
Flight Safety Foundation Student Chapter at Purdue University
October 30th, 2013
Flight Safety Foundation
66th International Air Safety Summit
Washington, D.C.
Special thanks to Founding Chapter Advisor: Stewart Schreckengast

2. Student Chapter Inaugural chapter at Purdue University
Research based student organization, consisting of both undergraduate and graduate students
Currently comprised of 11 active members

3. Introduction & Purpose
Review of factors of runway excursions 1
Comparison of reports 2
Analysis of FSF dataset for landing excursions 3

4. Comparing Reports FSF Report Boeing Report Reports are independent
Most causal factors contributing to runway excursions are similar

5. Comparing Reports

6. Database Exploration Type of Operator Aircraft Type Aircraft Class
After comparing reports, chapter members reviewed various other parameters:
Type of Operator
Aircraft Type
Aircraft Class
Factors after Stabilized Approaches

7. Type of Operator
Contaminated runway
Factors remained fairly constant across the Type of Operator
Unstable Approach
Landing long

8. Type of Operator Contaminated Runway Reverse Thrust Malfun.
Unstable Apph

9. Risk Factor by Aircraft Type
Aircraft type does not appear to play a role

10. Aircraft Class
Top 3 factors for business jets, commercial jets and turboprops:
Contaminated runways
Unstabilized approach
Landing outside touchdown zone

11. Aircraft Class
Excursion Factors of Aircraft Class by Percentage

12. Stabilized Approaches
Why do excursions happen after stabilized approaches?
183 out of 520 landing excursions from FSF Database ( ) we classified as stable approaches (50 were unknown)

13. Stabilized Approaches

14. Pilot Factors – Stabilized Approaches

15. Conclusions
Excursion factors appear to be fairly consistent across conditions 1
Most commonly cited factors were:
Runway contamination
Landing long/fast
Landing after unstabilized approach 2
Even after a stabilized approach, safe landing is not guaranteed 3

16. The End
Questions?