What to look for in a prebuy?

[JeffAxel]

Max pressure differential on the P337 is 3.35psi. Should hold a 10000ft cabin at FL200 with either engine running. Check the flap cables, they make a sharp bend and the damage is hard to see, Cessna put out a SB on this a while back. Use every radio, autopilot and piece of avionics and make sure they all do what they are supposed to do. Make sure the pitot heat works, hard to find replacements.