The aircraft got airborne from Mumbai Airport, India at 16:58 hours local time for a pilot prof check flight to Surat Airport. First the captain was subjected to a prof check. Following a go around the controls were transferred to the co-pilot. At 18:00 hours the co-pilot carried out his first visual landing at Surat airfield on runway 22. Immediately after landing, the aircraft swerved to the right. The captain took over the controls and tried to steer the plane back to the runway centerline. He did not succeed and the aircraft left the runway and ran onto an uneven grassy area beside the runway. An investigation revealed that the brake stator disc of the right hand main gear had failed. The brakes were replaced 461 landings before the accident. No maintenance records were maintained. Per Service Bulletin, the brake system should have been inspected after 376 landings. Probable cause of accident: “During landing roll, RH Main Wheel got locked-up due to broken brake stator disc which resulted into drifting of the aircraft and Runway Excursion.”