During engine start, when should the pilot add fuel?

• A. Before starting
• B. At 13% Ng
• C. The pilot does not add fuel; EPECS adds automatically above 13%
• D. After start

Answer: (C)

During start, the engine’s Electronic Propulsion and Engine Control System handles fuel metering. No manual fuel addition is required from the pilot; the system automatically starts adding fuel once the Ng reaches about 13%. This threshold allows the engine to light off safely and smoothly, preventing flooding or a rough start. So the pilot doesn’t add fuel at any point before or after startup—the EPECS takes care of it once the engine reaches that approximately 13% Ng mark.