In June 2022, EASA initially proposed Means of Compliance (MoC) for mitigating SORA in M2 for medium and high robustness. After receiving significant attention and feedback, a working group consisting of EASA and some NAAs was formed to further develop the subject. Subsequently, in November 2022, this working group joined the UAS Technical Body’s Airworthiness Task Force (AW TF), which prioritised the development of two deliverables, namely D1 and D2.
D1 focuses on addressing mitigation means for medium robustness, utilising specific technical means associated with the UA. Meanwhile, D2 aims to offer guidance on how to evaluate the UA’s critical area to select the appropriate UA size in SORA step #2, but without using specific technical means associated with the UA.
In this article, we will discuss the document D1 about the development of the Means of Compliance (MoC) for SORA mitigation means M2.
This document applies to all levels of SAIL indexes, and is aimed at the following communities:
|Max characteristic dimension (m)||≤1||≤3||≤8||≤20|
|Nominal critical areas (m2)||0.8||8||135||1350||13500|
As a drone pilot or operator, it’s important to be aware of the means of compliance for M2 medium robustness.
Here are the guidelines for complying with M2 mitigation and supporting evidence:
However, it’s important to support these declarations with evidence, which can include documentation of appropriate testing, analysis, simulation, inspection, design review or operational experience. Evidence from operational experience should be supported by operation records and flight data.
The evidence should include the description of the mitigation means and how this reduces the effect of ground impact in case of loss of control. When the mitigation means require activation, its functioning should also be described. For example, the Flight Termination System.
The points to follow to comply with the requirements of the Means of Compliance are described below:
Description of the mitigation and the involved systems
To comply with M2 mitigation, you need to provide a description of the mitigation and the involved systems. This includes:
Provide evidence that the mitigation means reduces the effect of ground impact
To comply with M2 mitigation, you also need to provide evidence that the mitigation means reduces the effect of ground impact. This includes:
Provide evidence that the mitigation means works with sufficient reliability in the event of a loss of control
This criterion requires that the mitigation means be operational in the event of a malfunction resulting in a loss of control of the drone.
Provide evidence that the mitigation means does not introduce additional risk for people