ENGINE ASSEMBLY FOR AN AIRCRAFT COMPRISING A PRIMARY STRUCTURE OF A MOUNTING PYLON EQUIPPED WITH A BOX EXTENSION COMPRISING TWO PARTS IN THE OVERALL SHAPE OF AN ARCH

摘要

In order to reduce the overall weight of an engine assembly (1) for anaircraft and to increase the aerodynamic performance thereof, the inventionproposes arigid structure (34) of a mounting pylon (4) comprising a central box (36) anda boxextension (54) connected to a reducing gear case (26) of the turboreactor(10). The boxextension (54) includes two parts (60, 70) bearing the front engineattachments (7a, 7b,7c), these pieces each comprising a structure (63, 73) forming a reinforcingrib of thecentral box (36), as well as two parts (32, 72) of horseshoe shape surroundingthereducing gear case (26).