What was found
(LOG 0519782) PACK AND PNEUMATIC SYSTEM CONTAMINATED WITH HYD FLUID. R/R AIR PRESSURE FILTER ASSY REF B737 AMM 29-09 REF B737 AMM 21-00 FOR CONTAMINATION REMOVAL FROM AIR COND SYS CLEANED AS REQUIRED R/R RECIR FILTERS REF B737 AMM 21-25 REMOVED DUCT RT PACK BETWEEN LOW CONTOL VALVE TO PRIMARY HEAT EXCHANGER AND DUCT FROM TEMP CONTROL VALVE TO ACM CLEANED AND REINSTALLED PER B737 AMM 21-51. LEAK CHECK OK (762860) RMVD DUCT LT PACK BETWEEN FLOW CONTROL VALVE TO PRIMARY HEAT EXCHANGER AND CLEANED.