What was found
DURING FLIGHT 3001, LT ENGINE INTAKE CAUTION LIGHT ILLUMINATED INFLIGHT. AIR RETURN TO MEM. MAINTENANCE PERFORMED CONTINUITY CHECK, FOUND LOWER LT DUCT BAD. REPLACED LOWER LT DUCT P/N 6124-1 SN/OFF 219, SN/ON 100. PERFORMED ENGINE RUN TO OPS CHECK LOWER INLET DUCT. OPS CHECK GOOD.