Analysis of the Influence of Fatigue Factors ...

Analysis of the Influence of Fatigue Factors on Decision-Making by Flight Crews

Author Name : Nurbol Yeshmanov

ABSTRACT The article examines how fatigue factors influence flight‑crew decision‑making, with special attention to the additional stresses posed by mountain‑airport operations and the terrain‑induced workload they generate. High‑altitude approaches over complex terrain demand continuous vertical‑profile monitoring, rapid power‑setting changes, and precise energy management; when pilots are tired, these tasks amplify risk. The study integrates physiological, professional, socio-behavioral, and terrain-specific fatigue drivers based on a systematic review of 17 sources, regulatory‑standard analyses, accident cases, and the author’s line‑flying experience. Key findings show that cumulative fatigue slows reaction time, narrows attention, and heightens risk‑taking; these effects are magnified during mountain operations by density‑altitude performance changes, wind‑shear threats, and limited go‑around options. Circadian disruption, sleep apnea, and heavy caffeine use further degrade recovery. Current regulations that cap daily flight time at 10–12 hours mitigate—but do not eliminate—hazards; crews must still align rosters with individual biorhythms and the unique demands of mountainous terrain. Practical countermeasures include strategic ―recovery‑sleep‖ naps, optimized team communication in high‑terrain environments, and proactive medical screening. The results assist regulators, airline managers, mountain‑airport operators, and researchers in crafting fatigue‑risk‑management systems that account for human limits and terrain challenges.