If the engine does not light off within 10 seconds during start, which sequence should be followed?

If the engine does not light off within 10 seconds during start, which sequence should be followed?

• A. Move thrust lever to idle, then press start
• B. Reset the master switch and retry
• C. Wait 5 minutes and retry
• D. Place thrust lever in cutoff position, motor engine for 15 secs, then press start disengage button

Answer: (D)

If the engine does not light off within the allowed window, the proper action is to terminate the current start, motor the engine to clear the combustor and bring the bearings up to speed, then reattempt starting. Specifically, place the thrust lever to cutoff, continue motor the engine with the starter for about 15 seconds, then disengage the starter so you can reselect the start for another attempt. This sequence helps prevent a hung or hot start, reduces starter wear, and ensures proper fuel control and rotation before the next start attempt. The other options don’t address the immediate risk of a non-igniting start: simply moving the thrust to idle doesn’t abort the start; resetting the master switch can disrupt essential systems and isn’t part of the start procedure; waiting several minutes delays a corrective action that could lead to more damage or bad starts.

If the engine does not light off within the allowed window, the proper action is to terminate the current start, motor the engine to clear the combustor and bring the bearings up to speed, then reattempt starting. Specifically, place the thrust lever to cutoff, continue motor the engine with the starter for about 15 seconds, then disengage the starter so you can reselect the start for another attempt. This sequence helps prevent a hung or hot start, reduces starter wear, and ensures proper fuel control and rotation before the next start attempt.

The other options don’t address the immediate risk of a non-igniting start: simply moving the thrust to idle doesn’t abort the start; resetting the master switch can disrupt essential systems and isn’t part of the start procedure; waiting several minutes delays a corrective action that could lead to more damage or bad starts.