51.   Federal aviation authorities said security was not beefed up at major airports elsewhere but administrators indicated that they had taken steps to ensure that all current measures are enforced.

52.   Under US regulations, American airforce planes cannot fly in bad weather unless the radar equipment on the ground has been approved by the US federal aviation authority.

53.   US federal aviation authorities issued a new directive late Sunday telling airlines and airport authorities to tighten security.

54.   US federal aviation authorities said Wednesday they would lift flying restrictions on ATR commuter planes, if the manufacturer met certain conditions.

55.   Officials of the federal aviation office in Brunswick opened an inquiry.