Frangible mounting arrangement and method for providing same

A frangible mounting arrangement between a bearing and a bearing support, the arrangement including:

• a plurality of identical frangible bolts connecting mounting flanges of the bearing and the bearing support, the frangible bolts breaking above a selected breaking load, the breaking load resulting from at least one of a bending moment and a shear load on the mounting flanges, the frangible bolts being irregularly spaced about a circumference of the mounting flanges such that a circumferential spacing between a first and a second adjacent bolts is greater than a circumferential spacing between the second and a third adjacent bolts.

A method of providing a frangible mounting arrangement between a bearing and a bearing support in a gas turbine engine, the method comprising:

• connecting the mounting flanges of the bearing and the bearing support with first and second groups of frangible bolts, the frangible bolts of the first and second groups being disposed on a circle, adjacent frangible bolts belonging to a same group being at a first distance on the circle from each other, adjacent frangible bolts belonging each to one of the first and second groups being at a second distance on the circle, the second distance being larger than the first distance, the frangible bolts being resistant to axial loads and being configured to break when subjected to a breaking load above a predetermined value, the breaking load resulting from at least one of a bending moment and a shear load on the mounting flanges, the adjacent frangible bolts being at the second distance from each other breaking first.