The National Museum of the U.S. Air Force will temporarily close some galleries Saturday due to the discovery of fuel in a vintage A-1E Skyraider, according to the museum.

Museum staff Friday discovered the fuel in the plane during an inspection.

The museum said it will close the Korean War, Southeast Asia War, Cold War and Missile and Space Galleries temporarily while the airplane is defueled. Inspectors did not find any indication of fuel leakage.

“Safety is our primary concern,” museum director Jack Hudson said in a statement. “We know this is a great inconvenience for our visitors and we plan to re-open the galleries as soon as it is safe to do so.”

The museum’s Early War and World War II galleries and the presidential aircraft and research development hangar will remain open, the museum said.