What was found
STRONG ACRID MIST LIKE FUMES DETECTED IN THE COCKPIT BETWEEN 3500 MSL AND TRUE RUNWAY. NO ODOR DETECTED IN PASSENGER CABIN. ACCOMPLISHED INSPECTION WITH BOTH PACKS ON, CHECKED AIR CONDITIONING DISTRIBUTION AREA, FORWARD AND AFT CARGO AVIONIC BAYS, AND COCKPIT. NO ODOR PRESENT. OPERATIONAL CHECKED GOOD.