Private Pilot Flight Training and Instruction Flight Training Article Library | Back To 4VFR.COM Descending Mechanical Failure Frequency 1.Clogged fuel system 2. Throttle/mixture control 3. Oil line 4. Clogged carb/injectors 5. Connecting rods 6. carb/injector failure 7. Magneto 8. Exhaust 9. Valve 10. Crankshaft 11.Fuel Pump 12. Cylinder Written by Gene Whitt Flight Training Article Library | Back To 4VFR.COM