India to set noise limits for new aircraft

India's Directorate General of Civil Aviation (DGCA) set a noise limit for the aircraft purchased by airlines operating in India (Hindustan Times, 10-Feb-2011). The rule applies to aircraft manufactured after Jul-2011 and not to airlines' existing aircraft fleet. According to the rule, new aircraft would be cleared for use only if the noise emitted is within the limit prescribed by the airline regulator. Noise levels would be tested at three stages - take-off, landing and when the aircraft is airborne but close to the ground. The airline regulator has prescribed noise limits on the basis of the number of engines on an aircraft.