What was found
FLT 066, ABQ-JFK. CABIN ODOR EVENT. THE FLIGHT CREW REPORTED THAT THERE WAS A FOUL ODOR FROM THE ENVIRONMENTAL SYS ON DESCENT INTO JFK WITH IDLE THRUST SELECTED. ODOR ISOLATION PROCEDURE PERFORMED & NR 1 A/C PACK WAS ISOLATED, ODOR DISSIPATED. ODOR CAME BACK ON GROUND WITH APU BLEED & PACKS ON. ACFT TAKEN OUT OF SERVICE AT JFK FOR TROUBLESHOOTING IAW INFO NOTICE & ACFT DOES NOT HAVE PREVIOUS REPORTS RELATED TO CABIN ODOR WITHIN LAST 30 DAYS.