boeing247 wrote on Jul 11^th, 2012 at 11:57pm:

Oh, haha--looks like they weren't. However, does an inop pitot result in no speed display on the Ctrl+Z menu?

It happened to me too, but in the Catalina between Australia and New Zealand! The SHIFT+Z displays KIAS. The 707's Indicated airspeed disappears when the pitot tubes freeze, and so it also disappears on the SHIFT+Z display. ;)