United purchased their 727-22QC configured that way from Boeing. IIRC experience showed it wasn't feasible to have the aircraft down while the configuration was changed. Air freight was also increasing so rapidly that dedicated freighters was the way to go then. Al ----- Original Message ----- From: "Bahadir Acuner" <bahadiracuner@yahoo.com> To: <AIRLINE@LISTSERV.CUNY.EDU> Sent: Tuesday, December 17, 2002 11:41 AM Subject: Quick change aircraft > Are QC aircraft manufactured that way, or are they some kind of > converted version of the pax type? > > BAHA ACUNER - CFI,CFII,MEI > Fan of coming up with questions out of the blue > > www.bahadiracuner.com >