Shortly after confirmation of an investigation into Ferrari’s Charles Leclerc, Lewis Hamilton’s car is also under inspection.

Lewis Hamilton’s Ferrari underfloor plank has been found to have been over the permitted level of wear, triggering a referral to the FIA stewards.

Lewis Hamilton facing disqualification from Chinese Grand Prix

Hamilton, who finished sixth in the Chinese Grand Prix after employing a two-stop strategy, has been referred to the stewards over the floor plank of his car.

According to FIA technical delegate Jo Bauer, who explained the skid wear procedure carried out on Hamilton’s car, the “rearmost skid was measured according to the team’s legality documents submission in accordance with TD039 L, item 1.2 b) I).

“Measurements were taken along the stiffness-compliantarea at three different points of the periphery (inner arc).

“The recorded measurements were 8.6 mm (LHS), 8.6 mm (car centerline) and 8.5 mm (RHS).

“As this is less than the 9 mm minimum thickness required by TR Article 3.5.9 e), I am referring this matter to the stewards for their consideration.”

The stewards have since confirmed a summons has been issued to Ferrari, for what appears to be a straightforward breach of the technical regulations – meaning a likely disqualification.

Two seasons ago, Hamilton – coincidentally along with now teammate Charles Leclerc – was disqualified from second place at the United States Grand Prix, due to excessive wear of his plank.

Leclerc’s fifth-place finish in China is also under threat due to a separate alleged technical transgression, one which is also likely to trigger a disqualification.

Having raced to fifth with a damaged front wing, Ferrari were permitted to replace the front wing for weighing purposes but, even after this was done, the SF-75 was found to be a kilo underweight.

The car’s weight with the spare front wing attached came in at 800.5 kilogrammes but, once the fuel was drained out of the car, the weight came in at 799.0kg.

The spare front wing was also 0.2kg heavier than the damaged one used during the race. With the car a kilo underweight, Ferrari thus face the stewards on two separate charges on both of their cars.

Separately, Alpine has also been summoned for a similar weight limit transgression on Pierre Gasly’s car, also a kilo underweight.