After Daniel Ricciardo and Sebastian Vettel qualified in fifth and sixth respectively for Sunday's race, an examination of their cars by FIA technical delegate Jo Bauer revealed what he believed was excessive flex on the front wing of both cars.
Article 3.15 of the Formula One technical regulations limits moveable aerodynamics, and the team have now been summoned before officials to explain the findings.
If found guilty of a breach of the rules, Ricciardo and defending champion Vettel could be forced to start the season-ending race from the back of the grid.
