What was found
AFTER LIFT-OFF ACRID SMOKE ODOR AND EYES HAD BURNING SENSATION. LEVEL OFF AT 10,000 FT. NO CLEARING. OPENED RAM AIR ON DESCENT TO CLEAR AIR. SHUT OFF NR 2 PACK AS IT HAD A HIGH TEMP 55 DEG C. NO OTHER WARNINGS. REPLACED CHECK VALVES 291394,293388,291388,292388. CLEANED AND BLEW OUT BLEED AIR PRESSURE LINE STARTING AT 14TH STAGE RESTRICTOR 291392 ENDING AT CHECK VALVE 291378 PERFORMED POWER ASSURANCE CHECK PER JRH. RAN NR 1 PACK FULL HOT/FULL COLD DURING POWER ASSURANCE CHECK WITH NUMBER ONE ENGINE BLEED. UPON RETURN TO THE GATE, FOUND ONLY MOISTURE IN FILTER 291376, REF MM 29-14-00-0. CHANGED FILTER PER 29-14-00-0. NO HYDRAULIC FLUID ODOR IN CABIN/COCKPIT DURING RUN.