you can read about it's history which is quite interesting.
OT-ZAK is painted in the external livery as it flew in the 1960's. Slightly different from the other aircraft in it's squadron which were all white with a red cheatline, OT-ZAK was half white and half aluminium with a red cheatline.
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Installation is simple:
Copy the "Hunting_Percival_Pembroke_BAF" folder contained in this zip to the
"Flight Simulator 9/aircraft" folder on your PC.