What was found
ACRID OVERHEAT ODOR NOTICED AT ABOUT 13,000 FEET MSL AND AGAIN AT 1500 FT. CABIN ALTITUDE SELECTOR IN AUTO 2 DUE TO PREVIOS DEFERRAL. RAN APU AND A/C PACKS FOR 1 HOUR WITH NO UNUSUAL ODORS NOTICED. RAN NR 1 AND 2 ENGINES IAW MM 71-00-00 AND A/C PACKS, NO ODORS NOTED. INSPECTED E&E BAY, A/C BAYS AND ENTIRE A/C FOR LEAKS OR ABNORMALITIES. NONE NOTED. ACFT OK FOR SERVICE.