SIO can investigate which classes of mishaps?

• A. A, B, and C
• B. C, D, and E
• C. A, D, and E
• D. B, C, and D

Answer: (B)

The Safety Investigation Office handles formal investigations for mishaps with higher safety significance. These are the cases that involve substantial consequences or potential systemic safety issues, typically categorized as the higher-severity classes. Therefore, the mishap classes investigated by SIO are the ones labeled as C, D, and E. Lower-severity categories (A and B) are generally managed at a more local level without the need for the formal SIO process.