Published: Sep 05, 2012 3:35 PM EDT
Updated: Sep 06, 2012 6:31 AM EDT

DALLAS (AP) - Radio talk show host Glenn Beck isn't backing down from his public attack on American Airlines.

For a second straight day, Beck on Wednesday used his radio show to complain that a flight attendant treated him rudely. Beck claims it was punishment for his conservative views.

Beck says American should fire the flight attendant, and he's vowing to never fly on American again.

American says it's still looking into the incident - a response that frustrates Beck, who has one of the biggest audiences on talk radio.