The F.A.A. told airlines to examine the mechanisms on all MD-80 series and similar planes, like MD-90's, DC-9's and Boeing 717's.

The F.A.A. directive told airlines to watch out for passengers using cash to buy one-way tickets to overseas cities.

In addition, the administrator said, the agency told airlines and airports to recheck that no one with any of those 750,000 badges had a criminal record.

So her aide began to tell airlines and hotels unequivocally that Ms. Brailsford was a very important female executive.

Since March, the union has told airlines to comply with the requests for passenger information from the United States, even though they breach European Union data protection laws.

In addition to ordering the replacement of suspect bearings, the agency told airlines to stop using fuel tanks in the horizontal stabilizers of 747-400's, the newest model.

Earlier this week UKBA told airlines that passengers should reconsider their travel plans in case of significant delays.

Last year, the Federal Aviation Administration drafted a minimal rule telling airlines to allow safety seats aboard.

The United States Federal Aviation Administration immediately told American airlines to increase their inspections of electronic consumer goods placed on aircraft, either in checked or carry-on luggage.

The Federal Aviation Administration told airlines flying planes with more than 19 seats to raise the assumed average weight of each passenger by 10 pounds, and for each checked bag 5 pounds.