RESIDENTS living under the Kai Tak flight path staged a vigil at the airport last night to press the Government to reverse its decision to extend flight hours. Legislative councillors are expected to debate the issue this afternoon. About 340,000 people live under the flight path across Shamshuipo, Kowloon Tong, and Kowloon City. The plan to extend the flying hours has been prompted because the airport deals with too many flights - 28 arriving and departing flights an hour during peak time. And the Civil Aviation Department estimates the additional flights, which might produce noise of up to 110 decibels, will bring Hong Kong an extra $4.3 billion in tourism revenue and about $160 million in landing charges and departure taxes. Kowloon City resident Lai Wong Lai-pun, 60, said: 'I cannot hear the television at its maximum volume when the planes flies over our building.' Legislator Frederick Fung Kin-kee, who led residents and district board members in the sit-in yesterday afternoon, said : 'In the so-called public consultation, the Civil Aviation Department mostly asked the views of the airlines which, owing to their business interests, must support the Government.'