What was found
ON DESCENT THROUGH LOWER ALTITUDES BELOW 12,000 FT CABIN HAS STRONG ENGINE OIL/ WET SOCK SMELL. PERFORMED FIM FOR SMOKE/FUMES IN CABIN IAW FIM 21-00 TASK 806 UP TO STEP F. (F). OIL SMELL ON HAPPENS WHEN RIGHT ENGINE BLEED IS THE SUPPLY FOR PNEUMATIC/PACK SYSTEM. FURTHER T/SHOOTING REQUIRED. REF W/O# 381678. REMOVED HIGH STAGE VALVE ON ENG 2 TO CHECK FOR OIL CONTAMINATION. NO OIL NOTED. USED BORESCOPE TO INSPECT 5TH STAGE VALVE FOR OIL CONTANIMATION. NO OIL NOTED. REINSTALLED HIGH STAGE VALVE WORK DONE IAW AMM 36-11-06/401.INSTALL TEST GOOD. NO DEFECTS NOTED AT THIS TIME. A/C OK FOR SERVICE