Maybe extra section ATC Computers would not permit two identical Aircraft Identifications (ACID)in the system. It also is done when the original light is so late that they start another aircraft on the route segment rather than delay all the boarding passengers. Several other options but this ounds the most plausible to me. My WAG would be the D stands for delayed. Al Al ----- Original Message ----- From: "Bahadir Acuner" <bahadiracuner@yahoo.com> To: <AIRLINE@LISTSERV.CUNY.EDU> Sent: Monday, October 28, 2002 10:55 AM Subject: Two NW33s > Flight Explorer shows two NW33 from AMS to SEA. > One is labeled as NW33D and the other one is NW33. > As the latter could be the normal flight, is 33D > a reposition or a canceled flight from the day before? > > Any takers? > > BAHA ACUNER - CFI,CFII,MEI > > www.bahadiracuner.com