A light multi-purpose aircraft with a controlling integrated complex comprises a fuselage (1); a wing (2); a fin assembly (3); a landing gear (4); a power plant (5); a radio inertial navigation and landing complex; an integrated electronic display system; a complex emergency escape system; an objective monitoring system; a complex control system; a general-purpose aircraft equipment system; a crest-of-helmet target indication system; a speech information control system; a data input system; control panels; an on-board communication complex; on-board maintenance panels; and also a controlling integrated complex (6) incorporating an on-board digital computer system (7); an information exchange system composed of multiplexer and radial channels; and systems and/or units for interfacing with all functional complexes and systems of the aircraft in which the on-board digital computer system (7), through corresponding interfacing systems and/or units, is connected by multiplexer channels with the aircraft systems, including the general-purpose aircraft equipment system; in doing so, a system for interfacing with a general-purpose aircraft equipment (23) consists of a first conversion and computation unit (27) and a second conversion and computation unit (28) connected to a control and monitoring unit (29), and also of general-purpose aircraft equipment interfacing units; said units (27, 28) being connected to a multiplexer information exchange channel, said control and monitoring unit (29) being interfaced by radial channels with both said general-purpose aircraft equipment interfacing units and interfacing systems and/or units of other aircraft systems, which in turn are connected with multiplexer or radial channels of an information exchange system of the controlling integrated complex (6). A light multi-purpose aircraft with a controlling integrated complex affords an improved efficiency of realizing monitoring and diagnosis functions of all aircraft systems, including electronic and general-purpose aircraft equipment.