Abstract: A substitution device for replacing a turbojet type of aircraft engine, with a nacelle comprising protective covers, and a support mast having two engine mounts, each of said protective covers being mounted to pivot between an open position and a closed position, said substitution device comprising a body, two anchors attaching to the engine mounts of the engine support mast, and bearing portions adapted to receive support portions belonging to the protective covers. A method for installing such a substitution device in a nacelle, which makes it possible to close the engine covers and authorize the movement of the aircraft.

Abstract: A tool for tightening and untightening screwed devices, such as bolts for fixing engines (10) to struts (12) on aircraft, comprises a hydraulic wrench (20), a hydraulic pump (22), preferably manual, at a distance from the wrench, and a tube (24) connecting the pump (22) to the wrench (20). The tool also comprises a force resistance structure (26) that transmits wrench reaction forces to an adjacent part, such as the strut (12).

Abstract: This invention relates to a protection device (30) for an air intake structure (6) of a jet engine (1), said structure comprising an air intake cowl (8) and an air intake lip (10) that jointly delimit a fan case ducting (12), the cowl having a top portion provided with at least one ventilation scoop (20) and the lip defining a fan case ducting intake (14), the device comprising a protective tarpaulin (32) with a main portion (34) designed to close off the intake (14) when the device is assembled on the structure (6). According to the invention, the protective tarpaulin also comprises a secondary portion (40) fixed to the main portion, said secondary portion being provided with stiffening means (42) and designed to partially cover the cowl (8), to close off each ventilation scoop.

Abstract: A tool for tightening and untightening screwed devices, such as bolts for fixing engines (10) to struts (12) on aircraft, comprises a hydraulic wrench (20), a hydraulic pump (22), preferably manual, at a distance from the wrench, and a tube (24) connecting the pump (22) to the wrench (20). The tool also comprises a force resistance structure (26) that transmits wrench reaction forces to an adjacent part, such as the strut (12).

Abstract: This invention relates to a protection device (30) for an air intake structure (6) of a jet engine (1), said structure comprising an air intake cowl (8) and an air intake lip (10) that jointly delimit a fan case ducting (12), the cowl having a top portion provided with at least one ventilation scoop (20) and the lip defining a fan case ducting intake (14), the device comprising a protective tarpaulin (32) with a main portion (34) designed to close off the intake (14) when the device is assembled on the structure (6). According to the invention, the protective tarpaulin also comprises a secondary portion (40) fixed to the main portion, said secondary portion being provided with stiffening means (42) and designed to partially cover the cowl (8), to close off each ventilation scoop.