False actions of the aviation fire protection system caused by disturbances in power circuits

Abstract The article presents the results of simulation tests of the SSP-FK aviation fire protection system and the identification of the main causes of its false operation on many airplanes and helicopters of the Polish Armed Forces with the use of a diagnostic simulator built at ITWL. The results of the performed statistical analyzes pointing to the execution blocks as the key factors in false fire signaling are discussed. Selected test results of the developed simulation model of the actuator unit under the conditions of disturbances occurring in its supply circuits (in particular instantaneous voltage drops) are presented. The effectiveness of the presented test method with the use of a simulation model of a fire protection system, which can be used to train the engineering and aviation service and pilots, and to support the work of the Aircraft Accident Investigation Commission, was pointed out.