What was found
SHORTLY AFTER TAKEOFF, AN ODOR PERMEATED THE AIRPLANE. SMELLED ELECTRICAL, BUT NO SMOKE OR VISIBLE INDICATIONS. SIC'S EYES WERE BURNING, PIC HAD SLIGHT HEADACHE AFTER LANDING. RAN A/C. INSTANTLY ON START-UP OBSERVED A SOAP OR CRAYON LIKE ODOR. RAN A/C FOR 30 MIN. ODOR GRADUALLY WENT AWAY. NO BURNING EYES OR HEADACHES. OPERATED COCKPIT & CABIN TEMP CONTROL TO FULL HOT & COLD SEVERAL TIMES. ODOR NOT NOTICEABLE AT END OF RUN-UP. NO DEFECTS NOTED IAW 560 XL MM 71-00-04. REMOVED AND REPLACED LEFT AND RT OZONE CONVERTERS PERFORMED FULL POWER RUN LEAK CHECK GOOD. NO ODOR IN COCKPIT OR CABIN NOTED WORK PERFORMED PER CESSNA 560XL CH 27-71-00.