Abstract: The invention provides a fan cowl (11) of an aircraft engine made of a composite material having an optimized structure for withstanding the expected loads and for being able to be manufactured as a monolithic ensemble. The structure comprise a skin (13), frames (15) of a closed cross-section arranged in a transverse direction to the longitudinal axis of the aircraft and longitudinal beams (17, 19) comprising first parts (21) of a closed cross-section to be superimposed to the transverse frames (15) in their crossing zones and second parts (23) of an open cross-section in zones not crossing transverse frames (15) having their webs (41) arranged in a same plane. The invention also refers to a manufacturing method of said fan cowl (11).

Abstract: The invention provides a fan cowl (11) of an aircraft engine made of a composite material having an optimized structure for withstanding the expected loads and for being able to be manufactured as a monolithic ensemble. The structure comprise a skin (13), frames (15) of a closed cross-section arranged in a transverse direction to the longitudinal axis of the aircraft and longitudinal beams (17, 19) comprising first parts (21) of a closed cross-section to be superimposed to the transverse frames (15) in their crossing zones and second parts (23) of an open cross-section in zones not crossing transverse frames (15) having their webs (41) arranged in a same plane. The invention also refers to a manufacturing method of said fan cowl (11).

Abstract: Device (3) for providing a warning signal when the fan cowl doors (8, 9) of an aircraft are not properly latched by primary locks (6), wherein the device comprises a panel (4) the panel (4) being rotatably mounted on one of the two fan cowl doors (8 or 9), the panel (4) being closed on that one fan cowl doors (8 or 9) by rotation thereby covering at least partially the primary locks (6), such that all the primary locks (6) have to be properly latched for the panel (4) to be closed, and at least one of the panel (4) primary locks (6) not being properly latched prevents proper closing of the panel (4).

Abstract: Device (3) for providing a warning signal when the fan cowl doors (8, 9) of an aircraft are not properly latched by primary locking means (6), said device (3) comprising a panel (4) the panel (4) being fixed by rotating means (5) on one of the two fan cowl doors (8 or 9), the panel (4) being closed on that one fan cowl doors (8 or 9) by rotating on said rotating means (5) therefore covering at least partially the primary locking means (6), such that all the primary locking means (6) have to be properly latched for the panel (4) to be closed, and at least one of the panel (4) primary locking means (6) not properly latched prevents proper closing of the panel (4).