A method for manufacturing an equipment part comprising first and second portions, said first portion comprising a thin plate having a main surface , the second portion being formed by elements , an end surface of each of said elements being attached to the main surface, the main surface having large dimensions, that is to say, greater than a sum of all of the end surfaces of the elements of the second portion, the upper surface of the substrate having a contour delimiting the main surface , said upper face comprising a groove forming the contour of the main surface, a depth of said groove being less than the first thickness of the substrate, said method comprising the following steps: - providing a substrate having a first thickness greater than a second thickness of the thin plate, an upper face of said substrate including the main surface , said upper face being oriented upward; - providing a computer model comprising spatial coordinates of said main surface and said second portion of the equipment part; then - additive manufacturing of the second portion from the main surface, so as to secure said main surface and said second portion, said manufacturing being done to a series of layers deposited above the main surface; then - cutting in the first thickness of the substrate in order to obtain the thin plate having the second thickness , said thin plate including the main surface secured to the second portion of the equipment part. the main surface having large dimensions, that is to say, greater than a sum of all of the end surfaces of the elements of the second portion, the upper surface of the substrate having a contour delimiting the main surface , said upper face comprising a groove forming the contour of the main surface, a depth of said groove being less than the first thickness of the substrate, said method comprising the following steps: - providing a substrate having a first thickness greater than a second thickness of the thin plate, an upper face of said substrate including the main surface , said upper face being oriented upward; - providing a computer model comprising spatial coordinates of said main surface and said second portion of the equipment part; then - additive manufacturing of the second portion from the main surface, so as to secure said main surface and said second portion, said manufacturing being done to a series of layers deposited above the main surface; then - cutting in the first thickness of the substrate in order to obtain the thin plate having the second thickness , said thin plate including the main surface secured to the second portion of the equipment part. - providing a substrate having a first thickness greater than a second thickness of the thin plate, an upper face of said substrate including the main surface , said upper face being oriented upward; - providing a computer model comprising spatial coordinates of said main surface and said second portion of the equipment part; then - additive manufacturing of the second portion from the main surface, so as to secure said main surface and said second portion, said manufacturing being done to a series of layers deposited above the main surface; then - cutting in the first thickness of the substrate in order to obtain the thin plate having the second thickness , said thin plate including the main surface secured to the second portion of the equipment part. <EOS>