What was found
PDIS 635, FOUL ODOR IN COCKPIT ON TAKE OFF AND LANDING. SMELL DISSIPATED AFTER 2 OR 3 MINUTES. - CAPTAIN SAID SMELL ONLY IN COCKPIT AND FLIGHT ATTENDANT DIDN'T SMELL ANYTHING IN CABIN. FACT 11APR21 16:14 PERFORMED VISUAL INSPECTION OF ENGINES, NO OIL LEAK OR ODOR NOTED. PERFORMED VISUAL INSPECTION OF PACK 1 AND 2 NO EXTERNAL LEAKS OR ODORS NOTED. RAN ENGINES TO T/O POWER WITH PACKS 1 AND 2 ON WITH CREW. NO ABNORMAL ODORS NOTED. AC OK FOR SERVICE AT THIS TIME.