Now a day’s black box is available in aircraft for storing the all activity of the air craft. Here we design the black box which will detect the fault and automatically inform to control room through RF TX. We use RF TX and RF RX for communication. It has the following feature: 1 Automatically senses the engine vibration; an announcement is displayed in the base station in case of any sort of vibration in engine. 2 To avoid the collision. 3 Automatically senses the engine temperature, an announcement is displayed in the base station in case of abandon rise in engine temperature.