Uçuş Emniyetini Tehdit Eden İrkilme Refleksi ve Operasyonel Yansımaları

Abstract

Uçuşlar sırasında gürültü, yıldırım çarpması, ani motor arızası gibi beklenmedik uyaranların aniden belirmesi karşısında açığa çıkan istemsiz bir tepki olarak irkilme refleksi (startle effect) üzerinde az durulmuş olmasına rağmen havacılık operasyonlarının en kritik unsurlarından biridir. Zira, bu refleks nefes kesilmesi, kas kasılması, çarpıntı, motor becerilerde kesinti, kontrol kaybı gibi fizyolojik, karar almada gecikme, düşünsel boşluk, durumsal farkındalık kaybı, kognitif tünelleme gibi bilişsel etkiler gösterebilmektedir. Tüm bunlar uçuş esnasında bilhassa ani, acil gelişen, hızlı ve doğru karar verilmesi gereken durumlarda kritik karar alma süreçlerini, dolayısıyla da emniyeti etkileyebilmektedir. Bu bağlamda sivil havacılık emniyet yönetimi, insan faktörleri açısından bu faktörün incelenmesi önem arz etmektedir. Ancak literatürde bu konu üzerine eğilen araştırmaların sınırlılık arz ettiği görülmektedir. Bu önemden ve literatür boşluğundan hareket eden bu çalışma spesifik olarak irkilme refleksine odaklanarak, bu olgunun sivil havacılık bağlamında çeşitli yönleriyle incelenmesini amaçlamıştır. Nitel araştırma yöntemine dayalı olarak doküman analizi vasıtasıyla sivil havacılık otoritelerinin yayınladığı resmi raporlar, ulusal ve uluslararası hava yolu şirketlerinin emniyet prosedürleri, eğitim müfredatları ve operasyonel kılavuzları ile ilgili literatürde konuya ilişkin olarak yürütülmüş olan araştırmalar taranmıştır. Veriler, uçuş operasyonları bağlamında değerlendirilmiştir. Uçuş operasyonlarında yalnızca anlık bireysel bir tepki değil, emniyet performansı ve kültürü açısından da kritik bir faktör olduğu tespit edilen irkilme refleksine ilişkin değerlendirmeler ile bu çalışmanın sivil havacılık yönetimi literatürüne özgün bir katkı sunması ve uygulamaya yönelik farkındalık oluşturması beklenmektedir.

Keywords

• İrkilme refleksi
• Havacılık emniyeti
• Havacılık yönetimi
• İnsan faktörleri
• Kokpit

The Startle Effect as a Threat to Flight Safety and Its Operational Consequences

Abstract

Although the startle effect—an involuntary response triggered by the sudden onset of unexpected stimuli such as noise, lightning strikes, or abrupt engine failures during flights—has received limited scholarly attention, it constitutes one of the most critical elements of aviation operations. This reflex may manifest through various physiological effects, including breath-holding, muscle contractions, palpitations, interruptions in motor skills, and loss of control, as well as cognitive effects such as delayed decision-making, cognitive blanking, loss of situational awareness, and cognitive tunneling. All of these factors can influence critical decision-making processes during flight, particularly in sudden and emergency situations that require rapid and accurate responses, thereby affecting overall operational safety. In this context, examining this factor from a human-factors perspective holds significant importance for civil aviation safety management. However, the extant literature on the subject remains limited. Motivated by this importance and the existing research gap, the present study specifically focuses on the startle effect and aims to examine this phenomenon from multiple perspectives within the context of civil aviation. Drawing on qualitative research methods, the study employed document analysis to review official reports published by civil aviation authorities, safety procedures of national and international airlines, training curricula, operational manuals, and relevant scholarly studies conducted on the topic. The data were evaluated within the scope of flight operations. It is anticipated that the assessments regarding the startle effect—identified as a critical factor not only as an instantaneous individual reaction but also in terms of safety performance and safety culture—will contribute uniquely to the civil aviation management literature and raise practical awareness on the subject.

Keywords

• Startle effect
• Aviation safety
• Aviation management
• Human factors
• Cockpit

References

1. Aero Safety World (2025). The Crash of AF447: Sustained Stall. Erişim adresi: https://flightsafety.org/wp-content/uploads/2012/08/asw_aug12.pdf
2. APS Training (2025). Pilot resilience: Stretching beyond the breaking point. https://blog.apstraining.com/resources/pilot-resilience-stretching-beyond-the-breaking-point
3. Aviation Safety Network (2025). Ural Airlines Flight 178. Erişim adresi https://asn.flightsafety.org/asndb/319362
4. Aviation Safety Network (2025). Accident Airbus A321-211-VQ-BOZ. https://aviation-safety.net/asndb/319362
5. Barnett, J., Wong, W., Westley, D., Adderley, R., & Smith, M. (2012). Startle reaction: Capturing experiential cues to provide guidelines towards the design of realistic training scenarios. In Proceedings of the Human Factors and Ergonomics Society Annual Meeting (Vol. 56, No. 1, pp. 2477-2481). Los Angeles, CA: SAGE Publications.
6. BBC (2025). Mucizevi kurtuluşları Sully filmine konu olan yolcular 10 yıl sonra aynı koltuklarında. Erişim adresi: https://www.bbc.com/turkce/haberler-dunya-46893834
7. Belcastro, C., & Foster, J. (2011). Aircraft loss-of-control accident analysis. In AIAA Guidance, Navigation, and Control Conference (p. 8004). 8-11 August 2011, Portland, Oregon, USA.
8. Blumenthal, T. D., Cuthbert, B. N., Filion, D. L., Hackley, S., Lipp, O. V., & Van Boxtel, A. (2005). Committee report: Guidelines for human startle eyeblink electromyographic studies. Psychophysiology, 42(1), 1-15.

9. Boland, E. (2019). Managing Startle and Surprise. NLR.
10. Bradley, M. M., Cuthbert, B. N., & Lang, P. J. (1993). Pictures as prepulse: Attention and emotion in startle modification. Psychophysiology, 30(5), 541-545.
11. Burande, S. V. (2024). Evaluating COOL Technique for Commercial pilots overcoming startle effect. In D. Golightly, N. Balfe & R. Charles (Eds.), Contemporary ergonomics and human factors. CIEHF.
12. Burki-Cohen, J. (2010). Technical challenges of upset recovery training: Simulating the element of surprise. In AIAA Modeling and Simulation Technologies Conference (p. 8008). 8-11 August 2011, Portland, Oregon, USA.
13. Civil Aviation Authority (CAA). (2013). Safety sense leaflet: Human factors for pilots. CAA.
14. Dekker, S. (2017). The field guide to understanding human error. CRC press.
15. Ekman, P., Friesen, W. V., & Simons, R. C. (1985). Is the startle reaction an emotion?. Journal of Personality and social Psychology, 49(5), 1416.
16. European Union Aviation Safety Agency (EASA). (2025). Startle effect management. Final Report EASA_REP_RESEA_2015_3.
17. Field, J. N., Boland, E. J., van Rooij, J. M., Mohrmann, J. F. W., & Smeltink, J. W. (Eds.), (2024), Erişim adresi: https://www.easa.europa.eu/sites/default/files/dfu/EASA_Research_Startle_Effect_Managements_Final_Report.pdf
18. Federal Aviation Administration (FAA). (2016). Pilot’s handbook of aeronautical knowledge. FAA-H-8083-25B.
19. Federal Aviation Administration (FAA) (2025). Startle response. Erişim adresi: https://www.faa.gov/sites/faa.gov/files/2022-01/Startle%20Response.pdf
20. Federal Aviation Administration (FAA). (2025). Turkish Airlines Flight 1951 Wreckage Photos. Erişim adresi: https://www.faa.gov/lessonslearned/turkish-airlines-flight-1951-wreckage-photos
21. Grillon, C., & Baas, J. (2003). A review of the modulation of the startle reflex by affective states and its application in psychiatry. Clinical Neurophysiology, 114(9), 1557-1579.
22. Helmreich, R. L., Klinect, J. R., & Wilhelm, J. A. (1999). Models of threat, error, and CRM in flight operations. In Proceedings of the tenth international symposium on aviation psychology (Vol. 10, pp. 677-682). University of Texas, USA.
23. International Civil Aviation Organization (ICAO). (2014). Manual on upset prevention and recovery training (Doc 10011). ICAO.
24. Klein, G., Phillips, J. K., Rall, E. L., & Peluso, D. A. (2007). A data–frame theory of sensemaking. In Expertise out of context (pp. 118-160). Psychology Press.
25. Koch, M. (1999). The neurobiology of startle. Progress in Neurobiology, 59(2), 107-128.
26. Kochan, J. A. (2005). The role of domain expertise and judgment in dealing with unexpected events. University of Central Florida.
27. Kochan, J. A., Breiter, E. G., & Jentsch, F. (2004). Surprise and unexpectedness in flying: Database reviews and analyses. In Proceedings of the Human Factors and Ergonomics Society Annual Meeting (Vol. 48, No. 3, pp. 335-339). Los Angeles, CA: SAGE Publications.
28. Kochan, J., Breiter, E., & Jentsch, F. (2005). Surprise and unexpectedness in flying: Factors and features. In 2005 International Symposium on Aviation Psychology (pp. 398-403). Wright State University, USA.
29. Landis, C., & Hunt, W. A. (1939). The startle pattern. Oxford, England: Farrar & Rinehart.
30. Landman, H. M. (2019). Managing startle and surprise in the cockpit (Doctoral dissertation), Delft University of Technology.
31. Landman, A., Groen, E. L., Van Paassen, M. M., Bronkhorst, A. W., & Mulder, M. (2017). Dealing with unexpected events on the flight deck: A conceptual model of startle and surprise. Human Factors, 59(8), 1161-1172.
32. Landman, A., Van Middelaar, S. H., Groen, E. L., Van Paassen, M. M., Bronkhorst, A. W., & Mulder, M. (2020). The effectiveness of a mnemonic-type startle and surprise management procedure for pilots. The International Journal of Aerospace Psychology, 30(3-4), 104-118.
33. Lang, P. J., Bradley, M. M., & Cuthbert, B. N. (1990). Emotion, attention, and the startle reflex. Psychological Review, 97(3), 377.
34. Martin, W. L. (2013). Training Interventions for Managing Startle During Unexpected Critical Events. In Proceedings of the 66th International Air Safety Seminar 2013 (pp. 116-125). Flight Safety Foundation.
35. Martin, W. L., Murray, P. S., & Bates, P. R. (2011). What would you do if....? Improving pilot performance during unexpected events through inflight scenario discussions. Aeronautica, 1(1), 8-22.
36. Martin, W., Murray, P., & Bates, P. (2012). The effects of startle on pilots during critical events: A case study analysis. EAAP.
37. Martin, W. L., Murray, P. S., Bates, P. R., & Lee, P. S. Y. (2016). A flight simulator study of the impairment effects of startle on pilots during unexpected critical events. Aviation Psychology and Applied Human Factors, 6(1), 24-32.
38. Oliver, N., Calvard, T., & Potočnik, K. (2025). The Tragic Crash of Flight AF447 Shows the Unlikely but Catastrophic Consequences of Automation. Erişim adresi: https://hbr.org/2017/09/the-tragic-crash-of-flight-af447-shows-the-unlikely-but-catastrophic-consequences-of-automation
39. Reason, J., Hollnagel, E., & Pariès, J. (2006). Revisiting the Swiss cheese model of accidents. Journal of Clinical Engineering, 27(4), 110-115.
40. Rivera, J., Talone, A. B., Boesser, C. T., Jentsch, F., & Yeh, M. (2014). Startle and surprise on the flight deck: Similarities, differences, and prevalence. In Proceedings of the human factors and ergonomics society annual meeting (Vol. 58, No. 1, pp. 1047-1051). Los Angeles, CA: SAGE Publications.
41. Salmon, P. M., Stanton, N. A., & Jenkins, D. P. (2020). Distributed situation awareness: Theory, measurement and application to teamwork. CRC Press.
42. Shappell, S., Detwiler, C., Holcomb, K., Hackworth, C., Boquet, A., & Wiegmann, D. A. (2017). Human error and commercial aviation accidents: an analysis using the human factors analysis and classification system. In Human error in aviation (pp. 73-88). Routledge.
43. Simons, R. C. (1996). Boo! Culture, experience, and the startle reflex. New York, NY: Oxford University Press.
44. Simons, R. C. (1997). FACS in the study of the latah syndrome. Paul Ekman Erika L. Rosenberg.
45. SkyBrary (2025). CRJ2, En-Route, Northern Sweden, 2016. Erişim adresi: https://skybrary.aero/accidents-and-incidents/crj2-en-route-northern-sweden-2016
46. SkyBrary (2025). Report of the Flight Crew Human Factors Investigation into accident of TK1951, B7378 near Amsterdam. Erişim adresi: https://skybrary.aero/bookshelf/report-flight-crew-human-factors-investigation-accident-tk1951-b7378-near-amsterdam
47. Swedish Accident Investigation Authority (2025). Final Report RL 2016:11e — Accident in Oajevágge, Norrbotten County, Sweden on 8 January 2016 involving the aeroplane SE-DUX (CL-600-2B19), operated by West Atlantic Sweden AB, 12 Dec 2016. Erişim adresi: https://shk.se/download/18.2d6f089b18faca29dc81cffa/1700491384504/RL-2016_11e.pdf
48. The Guardian (2025). Final minutes of Air France flight AF447 to be examined as trial opens. Erişim adresi: https://www.theguardian.com/world/2022/oct/10/air-france-flight-af477-2009-crash-trial-airbus
49. Vlasak, M. (1969). Effect of startle stimuli on performance. Aerospace Medicine, 40(2), 124-128.
50. Vlaskamp, D., Landman, A., van Rooij, J., & Blundell, J. (2025). Recovery from startle and surprise: A survey of airline pilots' operational experience using a startle and surprise management method. International Journal of Industrial Ergonomics, 107, 103733.
51. Wiegmann, D. A., & Shappell, S. A. (2017). A human error approach to aviation accident analysis: The human factors analysis and classification system. Routledge.
52. Woodhead, M. M. (1969). Performing a visual task in the vicinity of reproduced sonic bangs. Journal of Sound and Vibration, 9(1), 121-125.