A Cessna 525 CitationJet CJ1 sustained substantial damage in a runway excursion accident on landing at Aruan? Airport, GO, Brazil. The seven persons on board sustained minor injuries. The occupants were on their way to a mass for former football player Fernand?o who had died in a helicopter accident. Arua¤a Airport has a single 1280 m long runway. The airplane landed on runway 24 and travelled about 350 m from the end of the paved surface until it came to rest at a fence close to the GO-530 highway. Contributing factors. – Control skills – a contributor. The pilot acted incorrectly on the handle of the auxiliary gear control, thinking that he was applying the emergency brake, making the braking of the aircraft impossible. – Training – a contributor. The activation of the incorrect lever for the emergency braking of the aircraft was due to insufficient training received by the pilot for the use of the system in question, thus compromising the proper management of the abnormal condition. – Ergonomics Equipment (ergonomic characteristics) – a contributor. The emergency brake actuator handle of the aircraft was located outside the pilot’s sight field, which, together with the lack of knowledge about the correct lever to be activated for emergency braking, favored the pilot’s automatic response in triggering the lever that was most adjusted and visually available on the panel – the emergency landing gear drive lever. – Instruction – a contributor. The instruction that the pilot received to operate the Cessna aircraft, model 525 did not emphasize in the theoretical phase the proper use of the emergency brake, nor contemplated training for the use of this system. – Insufficient pilot’s experience – a contributor. Despite having a lot of experience in aviation, the pilot was little experienced in the aircraft and still did not know basic functionalities like the use of the emergency brake and the engine shutdown through the evacuation checklist procedure.