The company that was hired to arrange for the banners to take flight tells TMZ they can't find a pilot who will do the job today because no one wants to cross the FAA. As the owner put it, "No other pilot will touch it with a ten foot pole ... They're afraid the FAA will take apart their plane piece by piece."

As we reported yesterday, the FAA grounded the plane that was supposed to carry banner #3 over a "mechanical issue" -- which turned out to be a seat belt tag.

The third banner was supposed to read "You knew, Stevie...You knew" -- a reference towards
Tiger's caddy Steve Williams. We're told the fourth (should it ever see the light of day) will read: "Tiger -- Still on for the foursome? -- Jesse James."