Years of experience and searching for new solutions have resulted in designing modern and efficient engines. The multirole F-16 Block 52+ aircraft, used by the Armed Forces of the Republic of Poland, is equipped with a single Pratt Whitney F100-PW-229 jet engine with a maximum thrust of 129,6 kN. Fast and unfailing start of the jet engine is the primary condition to obtain the operational efficiency of an aircraft. This article is dedicated to the description of security systems of the Pratt & Whitney F100-PW-229 engine used in F-16 Block 52+ serving in the Polish Air Force. It presents general engine characteristics and general safety conditions in force when starting the engine, concerning pilots and technical personnel. The most significant part of the article is eight break-downs presentations with their short characterization as well as preventive procedures which were developed by experienced staff and pilots. In authors opinion, this information would prevent future jet aircrafts failures.