What was found
FT # 178, AT APPROX 6K, FEET EMER CALL ON DESC FROM #1 FA THAT ODOR/FUME FROM REAR OF CABIN AT 4,000 FEET. STARTED APU AND XFR BLEED. AT GATE #1 FA REPORTS ENTIRE CABIN UST AT REAR & FWD CABIN LANDING ABOUT ODOR/FUMES. AIRCRAFT IS OK FOR SERVICE.