Air filtering system for an aircraft

1) An air filtering system (2) for an aircraft and comprising:

• an air box (3), which has at least one inlet opening (4), through which air to be filtered flows into the air box (3), and at least one outlet opening (5), through which filtered air flows out of the air box (3);
• and
• an air filter (6), which is arranged inside the air box (3) and is interposed between the inlet opening (4) and the outlet opening (5);
• wherein the air box (3) has two opposite twin mounting openings (8), which are obtained in two parallel and opposite walls of the air box (3) and are shaped to allow the air filter (6) to be inserted and removed through each one of them;
• and
• wherein two removable doors (9) are provided, each comprising an outer panel (10) configured to overlap a respective mounting opening (8) to close the mounting opening (8);
• wherein each door (9) comprises two inner appendages (11), which project from two opposite ends of the outer panel (10) and are perpendicular to the outer panel (10) so as to be arranged on two opposite sides of the air filter (6), when the door (9) is coupled to the respective mounting opening (8), and have a shape that is complementary to the two inner appendages (11) of the other door (9) so as not to overlap the inner appendages (11) of the other door (9), when both doors (9) are coupled to the respective mounting openings (8).