Airlines around the world have begun replacing Pitot tubes on their aircraft.
The L-shaped metal Pitot tubes jut from the wing or fuselage of a plane, and are usually heated to prevent icing.
A malfunctioning Pitot tube could mislead computers controlling the plane to dangerously accelerate or decelerate.
And aeroplanes with the new Pitot tubes have never had such problems," said Air France pilot Eric Derivry, a spokesman for the SNPL pilots union.
An internal memo obtained by The Associated Press, written by the Alter Union which represents about 12 per cent of Air France pilots, calls on the pilots to refuse to fly A330s and A340s until at least two of the three Pitot
sensors on the planes are replaced.
Arslanian of the BEA cautioned that it is too early to draw conclusions about the role of Pitot
tubes in the crash, saying that "it does not mean that without replacing the Pitots
that the A330 was dangerous.
The report did not say whether the pitot
tubes or the temporary absence of Dubois from the cockpit had any impact on the quickly unfolding events.
The coefficients 'a' and 'b' were determined by a least squares curve fit, based on Pitot
tube pressure loss data obtained in the absence of the support frame.