Stewards deferred a decision until after the race, when Ferrari representatives will be summoned for a hearing.
Leclerc started third on the grid at Yas Marina, alongside team mate Sebastian Vettel, and is fighting for third in the overall standings with Red Bull’s Max Verstappen.
Verstappen’s team boss Christian Horner said he didn’t see how Leclerc would not be disqualified.
"The interesting thing about it is they used the word significant," he told Sky Sports television. "The technical regulations are black or white...usually with a case like that it's either legal or it isn't."
Disqualification would secure third place overall for Verstappen. (Reporting by Abhishek Takle, editing by Alan Baldwin/Toby Davis)