FS2Crew has just released the iPad/ iPhone/ iPod version of its popular 737NG Audio Training Program. This is a great program for PMDG and iFly 737 NGX pilots!
http://itunes.apple.com/us/artist/bryan-york/id448857975
The Windows PC version of the 737 Audio Training is availalble via the FS Pilot Shop.
More News From FS2Crew:
737NG Audio Ground School Released
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