A thrust reverser blocker door comprising: a proximal surface extending in a lengthwise direction between a forward edge and an aft edge and extending in a widthwise direction between a first side edge and a second side edge; a distal surface located opposite the proximal surface and extending between the forward edge and the aft edge and extending between the first side edge and the second side edge; a first attachment feature extending from the distal surface; a second attachment feature extending from the distal surface; a drag link housing extending from the distal surface; a first diagonal stiffener extending from the distal surface and extending between the first attachment feature and the drag link housing; a second diagonal stiffener extending from the distal surface and extending between the second attachment feature and the drag link housing; and characterized by a first perimetrical stiffener extending from the distal surface and extending between the first attachment feature and the drag link housing; and a second perimetrical stiffener extending from the distal surface and extending between the second attachment feature and the drag link housing; and further comprising: a first middle stiffener extending in the widthwise direction between the first attachment feature and the second attachment feature; and a first forward stiffener disposed forward of the first attachment feature and the second attachment feature and extending in the widthwise direction between the first side edge and the second side edge; and further comprising: a second forward stiffener extending in the lengthwise direction between the first attachment feature and the forward edge; and a third forward stiffener extending in the lengthwise direction between the second attachment feature and the forward edge. a proximal surface extending in a lengthwise direction between a forward edge and an aft edge and extending in a widthwise direction between a first side edge and a second side edge; a distal surface located opposite the proximal surface and extending between the forward edge and the aft edge and extending between the first side edge and the second side edge; a first attachment feature extending from the distal surface; a second attachment feature extending from the distal surface; a drag link housing extending from the distal surface; a first diagonal stiffener extending from the distal surface and extending between the first attachment feature and the drag link housing; a second diagonal stiffener extending from the distal surface and extending between the second attachment feature and the drag link housing; and characterized by a first perimetrical stiffener extending from the distal surface and extending between the first attachment feature and the drag link housing; and a second perimetrical stiffener extending from the distal surface and extending between the second attachment feature and the drag link housing; and further comprising: a first middle stiffener extending in the widthwise direction between the first attachment feature and the second attachment feature; and a first forward stiffener disposed forward of the first attachment feature and the second attachment feature and extending in the widthwise direction between the first side edge and the second side edge; and further comprising: a second forward stiffener extending in the lengthwise direction between the first attachment feature and the forward edge; and a third forward stiffener extending in the lengthwise direction between the second attachment feature and the forward edge. a first middle stiffener extending in the widthwise direction between the first attachment feature and the second attachment feature; and a first forward stiffener disposed forward of the first attachment feature and the second attachment feature and extending in the widthwise direction between the first side edge and the second side edge; and further comprising: a second forward stiffener extending in the lengthwise direction between the first attachment feature and the forward edge; and a third forward stiffener extending in the lengthwise direction between the second attachment feature and the forward edge. a second forward stiffener extending in the lengthwise direction between the first attachment feature and the forward edge; and a third forward stiffener extending in the lengthwise direction between the second attachment feature and the forward edge.