Figure 2.
The bar chart presents the distribution of documented human errors across four H F A C S categories. The x-axis lists unsafe acts, preconditions for unsafe acts, unsafe supervision, and organisational influences, while the y-axis represents the number of documented errors. Unsafe acts record 42 errors, preconditions for unsafe acts record 28 errors, unsafe supervision records 15 errors, and organisational influences record 10 errors.Frequency Distribution of Maintenance Errors by HFACS Category