What was found
GOT A VERY STRONG SMELL OF FUEL IN FLIGHT CHECK WITH THE FLIGHT ATTENDANT & SHE DID NOT SMELL ANYTHING IN THE CABIN, ALL INDICATIONS NORMAL. WORE O2 MASK TO LANDING AS A PRECAUTION. AFTER LANDING SMELL PERSISTED. TIGHTENED B NUT AT APU FUEL CONTROL UNIT & SOLENOID SOV IAW AMM 49-31-01. CLEANED RESIDUAL FUEL FROM AREA. STARTED APU RAN AC PACKS FOR 1 HOUR. NO FUEL SMELL NOTICED IN CABIN OR COCKPIT, OK FOR SERVICE.