A ram air fan assembly, comprising: a motor/bearing housing extending along a horizontal length of the ram air fan assembly; an inner housing assembly in fluid communication with the motor/bearing housing to define a joint therebetween; characterised by the inner housing assembly including first and second ellipse-shaped slots (58, 58') being off-set from one another such that the first slot is positioned at a first angle (θ 1) with respect to a radial axis of the inner housing assembly that is perpendicular to the horizontal length, and the second slot positioned at a second angle (θ 2) with respect to the radial axis, wherein the second angle (θ 2) is different from the first angle (θ 1), and each slot (58, 58') extending along a first direction parallel to the horizontal length to define an axial width (wA) and extending along a tangential axis to define a tangential width (wT) being greater than the axial width (wA); first and second brackets, each of the first and second brackets including a first end coupled to the motor/bearing housing and a second end coupled to the inner housing assembly to maintain coupling of the motor/bearing housing and the inner housing assembly at the joint, the second end of the first and second brackets including a vertical channel aligned with one of the first and second slots (58, 58a); and a first bolt disposed through the first slot and into the vertical channel of the first bracket and a second bolt disposed through the second slot and into the vertical channel of the second bracket, the first and second bolts coupling the second end of the first and second brackets to the inner housing assembly. a motor/bearing housing extending along a horizontal length of the ram air fan assembly; an inner housing assembly in fluid communication with the motor/bearing housing to define a joint therebetween; characterised by the inner housing assembly including first and second ellipse-shaped slots (58, 58') being off-set from one another such that the first slot is positioned at a first angle (θ 1) with respect to a radial axis of the inner housing assembly that is perpendicular to the horizontal length, and the second slot positioned at a second angle (θ 2) with respect to the radial axis, wherein the second angle (θ 2) is different from the first angle (θ 1), and each slot (58, 58') extending along a first direction parallel to the horizontal length to define an axial width (wA) and extending along a tangential axis to define a tangential width (wT) being greater than the axial width (wA); first and second brackets, each of the first and second brackets including a first end coupled to the motor/bearing housing and a second end coupled to the inner housing assembly to maintain coupling of the motor/bearing housing and the inner housing assembly at the joint, the second end of the first and second brackets including a vertical channel aligned with one of the first and second slots (58, 58a); and a first bolt disposed through the first slot and into the vertical channel of the first bracket and a second bolt disposed through the second slot and into the vertical channel of the second bracket, the first and second bolts coupling the second end of the first and second brackets to the inner housing assembly.