On the 18th of August 2014 at about 1220hrs, a Diamond DA42 aircraft with registration number 5N-BNH, owned and operated by the International Aviation College, Ilorin took off from Runway 23 of Ilorin International Airport for a training flight with fuel endurance of four hours. There were two persons on board; a Flight Instructor and a Student Pilot. At the training area, the Flight Instructor requested the Student Pilot to perform stall simulation in landing configuration. After landing gear extension, the Flight Instructor noticed that the right main gear did not extend. According to the Flight Instructor, he observed two green gear indication lights for the nose and the left main landing gear but the right main landing gear indication light was OFF while the red unsafe light was ON.