The aircraft, which had 176 passengers and six cabin crew on board, landed safely though the sudden development created panic among the flyers.The flight, SG-515, took off from the Kolkata Airport for Mumbai at 6.17 a.m. on Wednesday. However, the cabin crew soon noticed a crack on a window glass of the flight and brought the matter to the notice of the pilot who immediately contacted the air-traffic control (ATC) of the Kolkata Airport and sought permission to make a precautionary landing.On receiving the permission, the pilot took the aircraft back to Kolkata and made a landing there. The passengers disembarked safely and the necessary repair work was initiated.--IANSsrc/arm(Disclaimer: This post has been auto published from IANS news agency without any modification to the text and has not been reviewed by editor)