What was found
OIL ODOR COMING FROM THE AIR VENTS WHEN APU IS ON.. GAINED ACCESS TO APU. REMOVED APU BLEED AIR DUCT AND INSPECTED FOR EVIDENCE OF OIL, NONE WAS FOUND. INSPECTED DOWN STREAM OF REMOVED BLEED AIR DUCT WITH BORESCOPE, NO EVIDENCE OF OIL WAS FOUND. INSTALLED PREVIOUSLY REMOVED APU BLEED AIR DUCT. REMOVED WATER SEPARATOR ASSY, FOUND TO BE OILY & DIRTY. CLEANED WATER SEPARATOR ASSY WITH DEGREASER & WASHED SOCK IN MILD DETERGENT. ASSEMBLED WATER SEPARATOR & INSTALLED. RAN APU, COMPLIED WITH LEAK CHK. FAINT ODOR COULD BE OBSERVED WITH APU BLEED AIR ON. STARTED NR 1 & 2 ENGS, TURNED OFF APU BLEED AIR & PREVIOUS FAINT ODOR DISSIPATED. TURNED APU BLEED AIR ON, RAN CABIN & COCKPIT TEMPS TO FULL HOT ALLOWED SUPPLY TEMPS TO INCREASE & STABILIZE, RAN TEMPS TO FULL COLD & ALLOWED SUPPLY TEMPS TO DECREASE & STABILIZE ODOR SEEMS TO HAVE DISAPPEARED. NOTIFIED MAINT CONTROL & THEY REQUESTED TO REPLACE CONDENSER SOCK & CLEAN OZONE CONVERTER. INSTALLED SPRING & CHAIN IN NEW COALESCER/CONDENSER SOCK. INSTALLED SOCK IN WATER SEPARATOR ASSY. RAN APU, LEAK CHECK & OPS CHECKS ARE SATIS, NO ODOR WAS NOTED. ALL WORK DONE IAW MM 21-51-00 & 49-10-00. REMOVED LT OZONE CONVERTER , REMOVED RT OZONE CONVERTER CLEANED OZONE CONVERTERS WITH PHOSPHATE FREE DETERGENT & COMPRESSED AIR IAW MM 12-19-02. INSTALLED OZONE CONVERTERS, RAN ENGINES, OPS CHK & LEAK CHKS SATIS AT THIS TIME. WORK DONE IAW 21-11-00.