The US Aviation Administration has issued a warning to airlines about a problem with the rudder of the Boeing 737

The U.S. Federal Aviation Administration said Tuesday it has issued a safety warning to airlines about the possibility of Boeing Co. 's 737 rudders getting stuck because of faulty parts.

A safety official asked the Federal Aviation Administration (FAA) a week ago to take action on the issue as soon as possible.

The Federal Aviation Administration's safety alert requires pilots and airlines to review Boeing's procedures for responding to stuck rudders, but does not require airlines to replace parts that may get stuck, Bloomberg reported.

The National Transportation Safety Board (NTSB) issued an emergency safety advisory to Boeing and the Federal Aviation Administration on Sept. 26 after investigating potential problems with the rudders of some Boeing 737 aircraft, prompting the FAA to convene a corrective Action Review Board meeting.

No Boeing 737s in the United States currently use the potentially faulty rudder part, but the National Transportation Safety Board said last week that more than 40 foreign airlines use Boeing 737s or Boeing 737 new-generation aircraft that may have a rudder that poses safety risks.