How does foreign object damage (FOD) occur and how is it typically mitigated?

• A. Ingestion of debris into the inlet or components; mitigated by intake screens, periodic FOD checks, and proper ground handling.
• B. FOD occurs only during maintenance.
• C. FOD cannot be mitigated.
• D. FOD is not a concern.

Answer: (A)

Foreign object damage happens when debris or other objects enter the engine or critical components and strike blades or block passages, causing damage or degraded performance. The most common path is ingestion into the inlet or other airflow paths. To minimize FOD, use intake screens or barriers to prevent entry, perform periodic FOD checks to locate and remove debris, and enforce proper ground handling to keep the area clear and tools secured. This approach directly addresses how debris can get in and how to stop it from causing harm, which is why it’s the best choice. FOD can occur during operation and maintenance, and it is preventable with disciplined procedures; saying it’s limited to maintenance, cannot be mitigated, or isn’t a concern doesn’t reflect how prevention is practiced in the field.