Id 632 - ATPL - On the ground, the Auxiliary Power Unit (APU) can be substituted for the:

×

New: Boost Your Preparation!

On our site, you'll now find our new PRO Simulation Panel! Here are some of the exclusive benefits you get by unlocking it:

• ✅ All official questions, none excluded
• 🧠 Explanations and predictions with Artificial Intelligence
• ♾️ No time or exam limits
• 🚫 Zero ads

💻 Discover the PRO Panel

Prefer to practice on your smartphone? 📱 Discover the Mobile APPs.

---

You can still continue with the free version, which gives you access to 75% of the questions with a limit of 3 simulations per hour.