In an ignition system, what action is taken if flameout occurs and ignition is lost?

• A. Re-establish ignition and perform relight per procedure.
• B. Ignore and continue.
• C. Shut down immediately with no relight.
• D. Increase fuel flow without ignition.

Answer: (A)

Flameout means the combustor flame has been extinguished, so the safe, correct action is to re-establish ignition and perform a relight according to the procedure. This re-ignition is done under controlled conditions to verify that fuel, air, and the ignition source are all correct and to confirm the flame is re-lit without creating a hazardous condition. After relighting, continue to monitor operation and check for any fault that caused the flameout in the first place.

Ignoring the flameout would let unburned fuel accumulate, creating a risk of delayed ignition or explosion. Shutting down immediately with no relight is excessive unless the procedure calls for it due to a fault. Increasing fuel flow without ignition would worsen the unsafe fuel/air condition.