What was found
AFTER DESCENT, WHILE LEVELING OFF AT 6000 FT, CREW DETECTED A STRONG ODOR IN THE AFT CABIN, EXTENDING UP TO THE FRONT. DETECTED BRIEFLY IN THE FLIGHT DECK AS WELL. NOT PRESENT ON LANDING. COMPLIED WITH INFO NOTICE 2017-T015B. DETERMINED TO BE A LEVEL 1 EVENT. ACFT OKAY FOR CONTINUES SERVICE.