What was found
ENGINE ANTI-ICE USED TWICE. BOTH TIMES DURING USE, AN ODOR WAS NOTICED THROUGHOUT THE CABIN AND COCKPIT. OZONE TYPE ODOR. IT CEASED WHEN ENGINE ANTI-ICE WAS SELECTED OFF. INSPECTED RHT NR 1 & 2 ENGINE ANTI-ICE DUCTS. CHECKED OK. RAN ENGINES NO ODOR NOTED. CREW STATED NO SMOKE, JUST ODOR. VERIFIED NO APU CONTAMINATION. CLEANED THE MLG WW, BELLY, 48 SEC, & APU INLET. BORESCOPED LT AUG VALVE, LT PRV, LT CROSSFEED VALVE, LT FLOW CONTROL VALVE, & CENTER MANIFOLD FOR OIL, NO OIL CONTAMINATION FOUND FROM NR 1 ENG PREVIOUS HOC. PERFORMED BOTH ALT DUCT BURN & FULL DUCT BURN, NO SMOKE ODOR NOTED. REPLACED COALESCER BAGS. A/C OK FOR SERVICE. C/W ALL NO GO ODI PROCEDURES.