1. Props. THIS THING WILL KILL YOU, SPEND THE $$$ AT A REPUTABLE SHOP THAT KNOWS BRASILIAS!!!

2. Flaps. See above.

3. EECs. They tend to drop offline in climb often, causing the engine to roll back about 10-20%Tq. Requires you to level off, power that engine to idle, and reset them. If it craps out on takeoff, the engine "fails fixed" at takeoff power, and the power cannot be retarded until you reset the EEC! That's why it's best NOT to abort for an EEC fail on takeoff!

4. Random items. I won't lie to you. This airplane is maintenance intensive, and the parts are becoming scarce. You can pick -120s up cheap, but they're expensive to PROPERLY maintain. And this particular airframe is very unforgiving to shoddy maintenance. Keep that in mind.