Pre-defined Risk Assessment (PDRA)


The contents of this website refer to legal bases which have not entered into force.

Analogous to the standard scenario (STS), the pre-defined risk assessment (PDRA) aims to facilitate the permit application process by ensuring that the risk assessment (SAIL - based on the SORA methodology) has already been performed. The aim of PDRAs, however, is to authorise more complex drone operations. PDRAs were developed by the European Aviation Safety Agency (EASA) on the basis of common drone operations and adopted by all Member States. 

For an operation to fall within this permit application process, the operator must certify that he or she meets all of the conditions specified in the PDRA. Unlike the STS, the drone does not have to have a class marking. Unlike STSs, the approval process in accordance with the PDRA does not specify any specific scenarios, which allow operators more flexibility in how they conduct their planned drone flight.

The PDRA-"Types"

It is possible to distinguish between two basic types of PDRA: PDRA-S and PDRA-G.

  • PDRA-S reflects the European STS (it covers the same operations for drones without class markings), 
  • while the PDRA-G includes the risk analyses of other specific drone operations which are relatively common in the EU.
 

PDRA-S01

"Mirror" of STS-01

PDRA-S02

"Mirror" of STS-02

PDRA-G01 PDRA-G02
Visual Contact Yes, VLOS Yes, EVLOS is possible Yes, EVLOS is possible BVLOS
Area under drone operator's control under drone operator's control sparsely populated sparsely populated
Airspace controlled or uncontrolled controlled or uncontrolled uncontrolled reserved
Max. hieght 120m 120m 150m  
Drone properties max. circumference of 3 m and/or 34 kJ max. circumference of 3 m and/or 34 kJ max. circumference of 3 m and/or 34 kJ max. circumference of 3 m and/or 34 kJ
Class marking not required not required not required not required
Pilot skills Online training and exam in accordance with ‘open’ A2. Additional practical experience at a recognised body. Online training and exam in accordance with ‘open’ A2. Additional practical experience at a recognised body. Case-specific, depending on the planned operation. Acquisition of knowledge relevant to the operation. Case-specific, depending on the planned operation. Acquisition of knowledge relevant to the operation.
In detail

Further information


Last modification 09.06.2021

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