The DC10-40 is a DC10-20, which was the P&W version only ordered by JAL and Northwest. However Northwest wanted its mark number to be superior to the -30 so Douglas made it the -40. And yes the intake was slightly bigger as per the MD11 for the P&W engine...Best Geoffrey Thomas -----Original Message----- From: The Airline List [mailto:AIRLINE@LISTSERV.CUNY.EDU] On Behalf Of Juan Carlos Gideon Sent: Saturday, 15 December 2001 4:51 PM To: AIRLINE@LISTSERV.CUNY.EDU Subject: DC-10 question. Hello List Members and Happy Holidays, Is a DC-10-40 a re-engined DC-10-30? Didn't the -40 infact have that duck tail similar to the one on the rear of an MD-11? The reason why I ask is because in this Great Airliners Series books offered by Airliners magazine, the Volume featuring the DC-10 talks very little, I mean very little about the -40 and is absent of any -40 pictures. In the list of all production DC-10s it lists the -40s, but why no pictures? Thanks to all, again Happy Holidays. Juan Carlos Gideon Burbank, CA "Former home of Lockheed"