"Interesting day -- just made a return-flight emergency landing at GSP," Graham tweeted, Politico reported. "About 5 minutes into today's flight from Greenville to Washington, I and my other passengers noticed the engine making strange sound[s]."
The plane departed Greenville-Spartanburg International Airport at 2:42 p.m. and landed minutes later at the same airport, where fire trucks were waiting.
"Thank you the first responders at GSP and flight crew for the work you do," Graham said.
Notable deaths of 2014 [PHOTOS]