While the standard duration of the B.Sc. Aeronautical Science course is 3 years, students may sometimes need additional time to complete the program. This can happen if a student fails to clear certain subjects and needs to reappear for exams or if they require more time to finish their projects or internships. In such cases, universities may grant extensions, allowing students to complete their degree requirements at their own pace. However, the total allowable extension period depends on the institution's rules and the specific circumstances.