What safety precautions must be observed when performing a borescope inspection?

• A. Borescope inspections can be performed with the engine running.
• B. Lockout/tagout, ensure energy sources are isolated, verify engine is at zero speed, wear appropriate PPE, and follow procedure to avoid blade damage.
• C. Only wear gloves; no need to isolate energy sources.
• D. No PPE required.

Answer: (B)