# 3.7. Preflight inspection

### Click the "Pre-flight inspection" button to open the pre-flight inspection interface.

<figure><img src="/files/Pw9OnH2QAbBwKMIkaGLa" alt=""><figcaption></figcaption></figure>

#### 3.7.1. Power on the other four batteries for rotor motors.

<figure><img src="/files/HshIjGCeZiBUtCxSekdw" alt=""><figcaption></figcaption></figure>

#### 3.7.2. airspeed calibration.

{% hint style="info" %}
The two of them cooperated and performed airspeed calibration according to the prompts.
{% endhint %}

<figure><img src="/files/FTY3SPAPngCn4KguJ81W" alt=""><figcaption></figcaption></figure>

#### 3.7.3. Motor test.

{% hint style="info" %}
Check the motor rotation one by one manually, make sure the motors on the drone rotates direction is the same as the in the software screen.
{% endhint %}

<figure><img src="/files/jnN4XMZrptLvXxcFM7Z3" alt=""><figcaption></figcaption></figure>

#### 3.7.4. Mode test

{% hint style="info" %}
Follow the instructioins in "Mode test" menu to check the servo control sufrace response in both Manual mode and FBWA mode.
{% endhint %}

<figure><img src="/files/vFwsB8NWM5bsG4nopI3b" alt=""><figcaption></figcaption></figure>

#### 3.7.5. Ground station mode switching check

{% hint style="info" %}
Click the ground station mode command button in sequence and observe whether the mode switching is normal.
{% endhint %}

<figure><img src="/files/yOvoOtVNdyCtdCjbR9oV" alt=""><figcaption></figcaption></figure>

#### 3.7.6. Check drone status.

{% hint style="info" %}
Check if the GPS status, video\&data link signal, battery voltage,fuel remaining, heading direction are normal from ground control software, check if there is any warning.
{% endhint %}

<figure><img src="/files/M9j5wqJcb1PZov3I5hmi" alt=""><figcaption></figcaption></figure>


---

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