For ground starts, the allowed OFF time between attempts is how many seconds?

• A. 10 seconds
• B. 20 seconds
• C. 30 seconds
• D. 40 seconds

Answer: (A)

Ground starts require a brief cooldown between attempts to protect the starter and the start system and to let conditions reset so the next attempt has a clean start. Ten seconds gives the starter a moment to de-energize and the engine start sequence components to reset without causing unnecessary delay. Longer gaps would slow down operations, while shorter gaps risk overheating the starter or not allowing the system to settle, increasing the chance of another failed start. So, ten seconds is the practical, safe interval between ground start attempts.