EgyptAir flight MS804 crashed into the Mediterranean Sea in May 2016, killing all 66 people on board.
The plane was travelling from Paris to Cairo when the devastating crash occurred.
French authorities have ordered an investigation as to whether a mobile device might have contributed to the plane’s demise.
Investigators have suggested the theory that a pilot charging his iPad in the cockpit could have caused a fire if it overheated.
The probe will focus on an Apple iPhone 6S and iPad Mini 4, both belonging to the first officer.
Investigators will examine whether one of the devices was plugged into the wrong socket.
CCTV footage reportedly captured the first officer placing a tablet device and a bottle of perfume on an instrument panel in the vicinity where the fire started.
iPad on EgyptAir plane could have caused crash say investigators
The flight data recorder showed smoke present in the toilet and avionics bay upon analysis of the wreckage, with high temperature damage and soot uncovered.
A voice recorder is believed to reveal crew were desperately trying to extinguish a blaze before the plane crashed.
One source close to the investigation said: “Cockpit plugs are not made for toasters or coffee pots. They’re for professional use.
“At this stage, the combustion or self-combustion of a tablet in the cockpit is the working hypothesis.”
According to Apple, authorities had not contacted the company about the investigation.
The technology giant said there was no evidence to link the EgyptAir crash with any of its devices.
An iPad belonging to the first officer which was in the cockpit is being examined
In a statement, Apple explained: “We haven’t been contacted by the GTA [Air Transport Gendarmerie] or any authority investigating this tragic event.
“We understand there is no evidence to link this event to Apple products. If investigators have questions for us, we would of course assist in any way we can.
“We rigorously test our products to ensure they meet or exceed international safety standards.”
There were 40 Egyptians, 15 French and at least three children on board the doomed flight.
One of the victims was British citizen Richard Osman, a 40-year-old father from Jersey.
International aviation expert David Learmount has argued against the iPad theory.
EgyptAir plane crash – 66 people were killed when the flight came down in May 2016
We rigorously test our products to ensure they meet or exceed international safety standards
He said: “Firstly, pilots don’t leave objects on the dashboard because they know they will end up in their lap when they take off or on the floor and they’ll get airborne in turbulence and could jam the controls.
“Also, a phone bursting into flames just below the windscreen is a fairly spectacular thing to take place on a flight, and they would have told somebody on the ground. Nobody has mentioned this.
“But the key point is while there were warnings about the window heating systems, there were also smoke alarms in the toilet and avionics bay under the floor. How would the fire have got under there? It doesn’t make sense.”
Instead the expert offered a theory of his own, that of a a short circuit or explosion.
Mr Learmount said: “My guess is the little computer in the avionics bay was damaged by fire; and issued spurious warnings, which were in fact the box screaming for help.”