I have sought and found one more solution to this issue for whomever seeks it. If you should receive the error: 'Aircraft Initialization Failure' the following will provide a more comprehensive fix at the actual root of the trouble.
FIX 2 -(Permanent cause root fix):
While FS is not running, the way to launch a flight is to recreate the 'Flight File,' and reset that file in the 'SITUATION' line. Also, there is another flag 'SHOW_OPENING_SCREEN' which is to be set to 0 (Zero). (Ordinarily the 'Fly Now' button sets these two items automatically and then auto launches Flight Simulator.) At this point, you will more than likley get a 'CORRUPT FILE' prompt before accessing the main menu but will be able to fly the simulator. What brings about this error is that the FS9.cfg file is still pointing to a 'SITUATION' FILE that doesn't exist and it will complain (error out) before showing you the main screen. To permanently correct this, locate the FS9.cfg file and edit it in 'NOTEPAD' to correct and end the error. Find the following two lines and set the value as written:
Line one:SHOW_OPENING_SCREEN=1
Line two:SITUATION=
Once you have SAVED it, that should solve the problem. 🙂
Note: If the aircraft specified in the 'SITUATION' line doesn't 'EXIST,' one reason could be because an attempt is/was being made by the user to fly a mal-created and/or incompatible A/C. If this occurs go to Internet Explorer toolbar and select 'MY DOCUMENTS.' Then delete "FLIGHT SIMULATOR FILES.' This will delete the temporary flight files held in the FS cache. Go back into the FS A/C folder, check for and delete any incompatable A/C.
Have fun flying! --If you still need help email me through Fly Away.