My mother was a flight attendant on a flight where they thought the front landing gear didn’t come down. There were three independent systems on an L-1011 to de

My mother was a flight attendant on a flight where they thought the front landing gear didn’t come down. There were three independent systems on an L-1011 to detect this and all three agreed that the landing gear failed to extend. They did a tower flyby, and the tower said the wheels were down, so they operated under the assumption it wasn’t locked into place. The plane circled for a long time while emergency crews foamed the runway and positioned themselves for an emergency landing. It turns out that all three independent systems malfunctioned and the landing gear was fine.