All TWA aircraft currently flying were converted to MRTC last year.
Here's an AA press release (dated 12/14/01) patting the mechanics on the back for, among other things, converting all 168 TWA planes to MRTC:
www.amrcorp.com/news/december01/14_wrench.htm
[This message has been edited by FWAAA (edited 07-16-2002).]