What was found
FLT#734, SFO-BOS. "OIL FUME EVENT RECOGNIZED BY PILOTS, INTERMITTENT THROUGHOUT DESCENT FROM 10,000 FT TO THE GROUND. UNABLE TO ISOLATE/IDENTIFY SOURCE. F/A'S DID NOT RECOGNIZE ODOR; C/W INFO NOTICE 2017-T015 SECTION B2, FOUND SOURCE TO BE APU TYPE 1, FOUND FCU LEAKING, REMOVED AND REPLACED FCU IAW AMM 49-32-11, OPS CHECKS GOOD, PERFORMED ECS LEVEL A DECON IAW AMM 21-00-00-615-B02-A NO ODOR PRESENT AT THIS TIME."