Abstract: A hatch-actuating mechanism, particularly for aircraft landing gear with a lateral closing panel (1) and a secondary closing panel (4) articulated to one another, a lateral pivoting fitting (5) joined at the bottom to the lateral panel (1), couplable by lateral means of articulation (6) to a fixed structure (7), a secondary pivoting fitting (8) joined at the bottom to the secondary panel (4), a lateral actuating cylinder (10) articulated on the fixed structure and on the lateral pivoting fitting (5), an intermediate actuating cylinder (13) coupled to a first coupling point (14) between the lateral means of articulation (6) and the intermediate means of articulation (9) on the lateral pivoting fitting (5), as well as on a second coupling point (15) on the secondary pivoting fitting (8), the intermediate actuating cylinder (13) being actuatable independently from the lateral actuating cylinder (10).