Which action should you perform before starting an engine on a narrowbody?

• A. Engage ignition before selecting power source.
• B. Set parking brake and verify the area is clear.
• C. Start engines without any checks.
• D. Begin with a high-power start while the aircraft is not secured.

Answer: (B)

Before starting an engine on a narrowbody, the priority is to secure the aircraft and ensure the area around it is clear. Setting the parking brake keeps the aircraft from moving during the start, which is crucial because thrust, engine response, or a small unintended movement could otherwise cause damage or injuries. Verifying the area is clear protects everyone from jet blast or propwash and from hazards like ground equipment or obstacles that could be struck as the engine spools up. Once these safety checks are confirmed, you follow the established start procedures for power source and ignition. Skipping checks, starting with the aircraft unsecured, or attempting a high-power start in an unsecure position all pose clear safety risks.