Combined, the airports contribute more than 100,000 jobs with a payroll of $3.1 billion.
The towers are all operated for the FAA at low-traffic airports and were to close by mid-June as the result of government-wide automatic spending cuts imposed by Congress.
American asked the Federal Aviation Administration to halt its flights until 4 p.m. CT.
Reuters reports the defective parts are pins that attach control surfaces to the plane’s tail.
The Federal Aviation Administration said the closures are being delayed in order to deal with legal challenges.
The airport is one of five in Illinois that are set to lose federal funding for control towers under the across-the-board government budget cuts.
The Federal Aviation Administration said in a letter, any review of proposed cuts would only be based on national interests.
The Federal Aviation Administration recently released a list of 238 airports were control towers could be closed as a result of budget cuts.
St. Louis Regional Airport would remain open after April 1, but without air traffic controllers, thanks to FAA budget cuts.
Airfield in Bethalto, Ill. is on list of those at risk of losing FAA control tower funding.