What was found
FLT#1853, JFK-PBI. 'DURING DESCENT MAGIC MARCOR MELL COCKPIT ONLY. SHUT OFF PACK 1 AND THE ODOR FUME DISAPPEARED. TURNED PACK 1 BACK ON AND THE ODOR RETURNED. STRONGER INTENSITY FLIGHT DECK ONLY; C/W INFO OTICE 2017-T015 SECTIONS A/B ISOLATED FAULT TO TYPE 5 ACCOMPLISHED TSM 05-50-00-810-831A AND C/W LEVEL A DECONTAMINATION OF ECS IAW 21-00-00-615-802-A NO FURTHER ODORS NOTED. A/C OK FOR SERVICE.'