> For the complete documentation index, see [llms.txt](https://avss.gitbook.io/prs-m4ex-for-dji-m4e-and-m4t-easa-c5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://avss.gitbook.io/prs-m4ex-for-dji-m4e-and-m4t-easa-c5/prs-m4ex-for-dji-m4e-and-m4t/prs-m4ex-limitations.md).

# PRS-M4EX Limitations

## Operational & Environmental Conditions:

* Drone Flight Mode = Normal Mode (N-Mode), Mission Mode, or Low-Speed Mode (T-Mode)
* Drone Maximum Tilt Angle = 35° Degrees
* Maximum Take-Off Weight = 1.39 kg
* Minimum Flyable Altitude Rating at 1.39 kg (Hover)  = 40.0 m
* Minimum Flyable Altitude Rating at 1.39 kg (Full Forward) = 40.0 m
* ATS Arming Height = 40 m
* Manual Triggering Device Range = < 8 km
* Manual Triggering Device Arming Height = 5 m
* Temperature Range = -10°C to +40°C
* Ingress Protection (IP) Rating = Not rated
* EASA Wind Limit (M2 Mitigation) = 9.24 m/s (18 knots)
* Regular Wind Limit = 12 m/s (23.3 knots)

{% hint style="danger" %}
ONLY FLY THE DRONE IN NORMAL MODE (N-MODE), MISSION MODE, OR LOW-SPEED MODE (T-MODE).
{% endhint %}

{% hint style="danger" %}
THE PRS-M4EX MUST BE FLOWN ABOVE THE MINIMUM FLYABLE ALTITUDE RATINGS FOR OPERATIONS OVER PEOPLE, WHICH IS 40.0 M OR HIGHER.  IF THE PRS IS DEPLOYED BELOW THE MDA, AVSS DOES NOT WARRANT THE PRS WILL PERFORM AS INTENDED.
{% endhint %}

{% hint style="danger" %}
ALWAYS FLY THE DRONE WITH THE DOWNWARD-FACING SENSORS ENABLED. FAILURE TO DO SO WILL RESULT IN THE PRS-M4EX ATS BEING UNABLE TO DISARM WHEN LANDING.
{% endhint %}

{% hint style="danger" %}
IT IS NOT RECOMMENDED TO CHANGE THE FLIGHT MODE MID-FLIGHT, AS THE DRONE MAY MAKE AN ABRUPT MANEUVER AND EXCEED THE “35°-DEGREE PITCH ANGLE".
{% endhint %}

{% hint style="danger" %}
IF THE PARACHUTE IS DEPLOYED IN HIGH WINDS, THE PARACHUTE CAN DRIFT. THE PILOT MUST CONSIDER DRIFT ZONES AND THE CONSEQUENCES IN THEIR RISK ASSESSMENT BEFORE FLIGHTS.
{% endhint %}

{% hint style="danger" %}
LEAVING THE PRS-M4EX ON FOR A PROLONGED PERIOD BEFORE TAKING OFF CAN CAUSE IT TO ARM (E.G., BAROMETER DRIFT).
{% endhint %}

{% hint style="danger" %}
DO NOT USE PROPELLER GUARDS WHEN USING THE PRS-M4EX, AS THIS WILL RESULT IN INTERFERENCE BETWEEN THE PRS-M4EX AND THE PROPELLERS.
{% endhint %}

{% hint style="danger" %}
IF THE PRS-M4EX IS INVOLVED IN A MAJOR CRASH, DO NOT REUSE THE PRS-M4EX.
{% endhint %}