January 20, 200917 yr I just purchase the FS2004 MD-11 and install directly over 747-400 without any trouble.Do i need to update the NAV data AIRAC 0901 again?Dilip
January 20, 200917 yr You shouldn't have to, but to verify look on the equip ID screen (first screen that appears when you start) on the MCDU or CDU and it provides the installed navdata date. Dan Downs KCRP
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