What was found
BOS - FLT 2851 - DURING TAKEOFF, TWO SEA GULLS STRUCK THE NR 2 ENGINE. AFTER INGESTION, THERE WAS A SMELL IN THE CABIN. FLIGHT RETURNED TO FIELD AT BOS AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE ACCOMPLISHED BIRD STRIKE CONDITIONAL INSPECTION PER MM 5-51-201 AND ACCOMPLISHED TAKEOFF POWER CHECK PER MM 5-51-20. REMOVED AND REPLACED THE NR 2 ENGINE CSD OIL COOLER PER MM 24-11-21 DUE TO CONDITIONAL INSPECTION CHECK. PERFORMED ENGINE RUNUP. ALL PARAMETERS WITHIN LIMITS. NO LEAKS NOTED. (M)