While airplanes occasionally roared overhead, about 60 Northwest Washington residents met last night at the Georgetown Day School to complain about late-night flights landing at National Airport.

"I have been here 8 1/2 minutes and I've counted seven planes flying overhead," said City Council member Jerry Moore Jr. (R-At Large), who spoke in support of halting landings at National after 10 p.m.

Moore, chairman of the council's Transportation and Environmental Affairs Committee, urged residents to lobby Congress and the Federal Aviation Administration to change FAA rules that enable two American Airlines flights and one TWA flight to land after 10 p.m. The airlines use the D.C. 9-80, the only jetliner quiet enough to meet noise rules at National between 10 p.m. and 7 a.m.

Barbara Worth, who has helped organize opposition to the flights, said they are disrupting her neighborhood. "It seems that in the past few weeks we hear noise constantly going till 12:30 or 1 in the morning."

Mary Kennedy, director of governmental affairs for American Airlines, attended the session but declined to speak, explaining that it was her understanding she had only been invited to monitor the meeting.

Later she said American was concerned about residents' problems, but intended to continue late landings.