São Paulo

The accident was the consequence of the combination of the following factors:
- Attention – undetermined.
It is likely that the pilot has experienced a lowering of his attention in relation to the available information and the stimuli of that operational context in face of the adverse conditions faced.
- Attitude – a contributor.
It was concluded that there was no reaction to the warnings of proximity to the ground (Caution Terrain) and evasive action to avoid collision (Pull Up), a fact that revealed difficulties in thinking and acting in the face of an imminent collision condition, in which the aircraft was found.
- Adverse meteorological conditions – a contributor.
The clouds height and visibility conditions did not allow the flight to be conducted, up to SBMT, under VFR rules.
- Piloting judgment – a contributor.
The attempt to continue with the visual flight, without the minimum conditions for such, revealed an inadequate assessment, by the pilot, of parameters related to the operation of the aircraft, even though he was qualified to operate it.
- Perception – a contributor
The ability to recognize and project hazards related to continuing flight under visual rules, in marginal ceiling conditions and forward visibility, was impaired, resulting in reduced pilot situational awareness, probable geographic disorientation, and the phenomenon known as " tunnel vision''.
- Decision-making process – a contributor.
The impairment of the pilot's perception in relation to the risks related to the continuation of the flight in marginal safety conditions negatively affected his ability to perceive, analyze, choose alternatives and act appropriately due to inadequate judgments and the apparent fixation on keeping the flight under visual rules, which also contributed to this occurrence.

Despite the fact that the aircraft sustained significant damage, CENIPA classified the event as an 'Incident' and on August 5, 2018, reported that closed the investigation with no final report being issued.

Contributing factors:
- Flight indiscipline – a contributor
The pilot failed to comply with the minimum fuel requirements laid down in the regulations, providing conditions for both engines to stop operating in flight, due to lack of fuel.
- Piloting judgment – a contributor
It was found in this flight an inadequate evaluation for certain parameters related to aircraft operation, particularly with regard to the influence of the chosen flight level on fuel consumption. This misjudgment led to the decision to proceed with the flight to the Aerodrome where it was intended to land, to the detriment of the more conservative option of finding a suitable place for an intermediate landing and a refueling, which led to the depletion of usable fuel in flight.
- Flight planning – a contributor
Inadequate flight preparation work, especially with regard to fuel calculation and cruise level selection, has degraded the safety level and also contributed to the actual accident.
- Decision-making process – undetermined
Difficulties in perceiving, analyzing, choosing alternatives, and acting appropriately due to inadequate judgment, may have resulted in poor assessment of flight parameters (available fuel, distance to destination, verified consumption, etc.), which may have favored the occurrence of lack of fuel failure.

Contributing factors
- Pilot judgment - undetermined
The absence of manuals and performance charts to guide the operation and actions based only on empirical knowledge about the aircraft may have taken to an inadequate evaluation of certain parameters related to its operation. In this case, the performance of the aircraft under conditions of weight, altitude and high temperatures may have provided its conduction with reduced margins of safety during takeoff that resulted in the on-screen accident.
- Flight planning - undetermined
The informality present in the field of experimental aviation, associated with the absence of support systems, may have resulted in an inadequacy in the work of flight preparation, particularly with regard to performance degradation in the face of adverse conditions (high weight, altitude and temperature), compromising the quality of the planning carried out, thus contributing to it being carried out a takeoff under marginal conditions.
- Project - undetermined
During the PR-ZRA assembly process, changes were incorporated into the Kit's original design that directly affected the airplane's take-off performance. Since the submission of documentation related to in-flight testing or performance graphics was not required by applicable law, it is possible that the experimental nature of the project has enabled the operation of the aircraft based on
empirical parameters and inadequate to their real capabilities.
- Support systems - undetermined
The absence of a support system, in the form of publications that allowed obtaining equipment performance data in order to carry out proper planning, added risk to operations and may have led to an attempt to take off under unsafe conditions.