Abstract: The invention concerns an avionics bay (1) for the installation of at least one electrical module (M), comprising a fluid cooling system and a housing (2) that is complementary to the electrical module (M) and that comprises an open front face (21) through which the module (M) can be removably installed inside said housing (2), and a rear face (20) on which there are arranged electrical connectors suitable for being connected to the electrical module (M), characterised in that the fluid cooling system comprises a cold plate (3) that is disposed on the rear face (20) of the housing (2) that is suitable for cooling the electrical module (M) when said electrical module (M) is installed inside the housing (2).