What was found
DURING FINAL APPROACH AFT CABIN HAD SLIGHT SMOKE SMELL BOTH SMOKE DETECTOR IN LAVS WENT OFF. BY LANDING SMELL HAD CEASED, ALARMS HAD STOPPED. REPLACED AIRFOIL PRESS REG VLV, RAN ENGS, PACKS AND ANTI-ICE SYSTEMS. PERFORMED AUG VLV CK PER PFHB. NO SMOKE AND NO ODOR.