What was found
BURNING ODOR NOTED AFTER TAKEOFF. SMOKE, FIRE OR FUMES, CHECKLIST COMPLIED WITH. ODOR DISSIPATED IN COCKPIT WITH LT PACK OFF. ODOR STILL NOTED IN CABIN FOR REMAINDER OF FLIGHT. MX INSPECTED EQUIPMENT COOLING AND RECIRCULATION FANS. OPENED LT ENG BUT NO OIL LEAKS WERE NOTED. INSPECTED 2.5 BLEED AND INLET AREA WITH NO TROUBLE FOUND. RAN BOTH ENGINES WITH ENGINE BLEED AND PACKS ON AND THERE WAS NOT ANY ODOR FROM AIR VENTS. AIR CONDITION SYS, OPS CHECK NORMAL.