It was therefore not a possible poor condition of the aircraft that caused the death of Olivier Dassault and his pilot.
The helicopter which crashed Sunday in Touques (Calvados) was "perfectly in working order", we learned this Wednesday from the Lisieux prosecutor's office.
"All the checks had been made", on the device which dates from 1986, before takeoff from private property, added the prosecutor of the Republic of Lisieux, Delphine Mienniel.
However, a technical failure is still not ruled out.
“The samples are in progress.
Thereafter there will be expertises ”, specified the magistrate.
The debris of this squirrel-like device was evacuated from the crash site on Tuesday, she said.
Toxicological samples in progress
Has there been human failure?
The autopsy performed on Tuesday, which concludes in the death of Olivier Dassault and his pilot by "multiple trauma", does not allow to say, explained the magistrate.
"Afterwards, we took samples which may be more meaningful," added the magistrate.
"If there is alcohol or narcotics, toxicological samples will in principle provide us with some answers," in the days to come, said Delphine Mienniel.
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As for the possible discomfort of the 74-year-old pilot, “as it stands, it is not a cardiac discomfort that appears.
In the state of the bodies, I am not convinced that we can establish it ”, explained the magistrate.
According to the first elements of the investigation, the helicopter "went into a spin with an extremely important centrifugal force" and "broke in two with the tail on one side and the cockpit on the other" after having " hit a tree, ”she added.
An investigation for "manslaughter" opened
The aircraft had just taken off in an "atypical" way, with an angle of about 45 degrees instead of 90 usually, according to the most direct witness of the tragedy, she recalled.
This witness is part of the family that owns the place where the tragedy took place, friends of the billionaire administrator of Dassault Aviation.
The witness was almost below the helicopter, according to the prosecution.
At least two other direct witnesses, personnel of the property, were heard, according to the same source.
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Investigators will also hear indirect witnesses who were in the vicinity of the property.
An investigation for "manslaughter" was opened Sunday.
According to the diocese of Beauvais, a mass is scheduled for Friday 10 am in the cathedral of Beauvais in the presence of the body of the deputy of the Oise but without burial, a funeral then being planned in Paris.