Helicopter Mil Mi-171 Serial 59489611103 Register SMH-4303 CH-598 used by Sri Lanka Air Force. Built 1995. Aircraft history and location Aircraft History CH-598 Sri Lanka Air Force c/n 59 489 61 1103 / 59489611103 SLAF re-registered to SMH-4303 SMH-4303 Sri Lanka Air Force SLAF ex CH-598 Send Updates Use APP to upload photo @ (optional) When Now? / / Send