What was found
(CAN) RT ENGINE PARTIAL FAILURE ON CLIMB-OUT. RPM, MP, FF, FP EXCESSIVE DROPS. TROUBLE SHOOTING FOUND THAT LT MAGNETO FAILED. NEW MAGNETO INSTALLED. A/C TEST FLOWN, SATISFACTORY TEST FLIGHT. U/S MAGNETO SENT OUT FOR O/H. TEAR DOWN FOUND POINTS BURNT. DISTRIBUTOR CAP ARCING INSIDE. TEST FOUND ONLY FIRING ON HALF OF CYLINDERS.