What was found
AFTER LIFT OFF STRONG ACRID SMELL IN COCKPIT ALONG WITH BURNING EYES (LEFT PACK #1 BLD) SWITCHED PACK/BLD SOURCE (RIGHT PACK #3 BLD) NO CHANGE IN SMELL. INTENSITY SEEMED TO CHANGE WITH PWR SETTINGS. INSPECTED INLETS & EXHAUST OF ALL ENGINES FOR FLUID NONE FOUND RAN ALL 3 ENGINES AT POWER FOR 20 MIN. WITH PACKS ON NO ARID SMELL OR BURNING EYES WHEEL WELL WERE CLEANED DURING WEEKEND LAYOVER SERVICE CK. SUSPECT VAPORS FROM SOLVENT ENTERED APU R&R LEFT AND RIGHT WATER SEPARATOR SOCKS OK FOR SERVICE.