How is fuel scheduling typically managed during engine start?

• A. Fuel is gradually increased to achieve stable light-off, then ramped to idle while monitoring EGT and RPM to avoid flameout or compressor surge.
• B. Fuel is held at maximum immediately after ignition to reach idle quickly.
• C. Fuel flow is not adjusted during start.
• D. Fuel is reduced to minimum until the engine stabilizes.

Answer: (A)

Fuel scheduling during start focuses on delivering fuel in a controlled way so the combustor lights off reliably and the engine eases to idle without instability. The process starts with a progressive increase in fuel flow to reach stable light-off, meaning the flame is established and the engine can respond to further movement without extinguishing. Once light-off is confirmed, the fuel is then ramped to an idle level while carefully watching engine indicators. Monitoring exhaust gas temperature (EGT) and RPM is crucial because too much fuel too quickly can push EGT high and risk flameout or cause compressor surge, whereas too little fuel can prevent stable ignition or smooth acceleration. This measured approach minimizes spikes, keeps the compressor within stable operating margins, and ensures a safe, controlled transition to idle.