Human error is often the result of complex interrelationships between
humans and computers. Despite the development for new technology in the
aviation domain, new types of human errors have been provoked in the
modern cockpit. This research applies Hierarchical Task Analysis (HTA)
and utilizes the - Human Error Template (HET) method - to predict pilots’errors during flight operations when performing a go-around in a large commercial transport aircraft. The method of HET is applied to each bottom level task step of the flight tasks in question based on HTA. A total of 67 pilots participated in this study including 25 captains and 42 first officers.The results show two inappropriate design-induced errors and three modes of pilots’ errors with high likelihood committed by pilots during performing go-around, ‘Fail to execute’; ‘Task execution incomplete’; and ‘Task executed too late’. Therefore, there is a increasing need to investigate further the impact to flight safety of such errors. The data gathered from this research will help to improve safety when performing a go-around by identifying potential errors on a step-by-step basis and allowing early remedial actions in procedures and crew coordination to be made.