What was found
SIG EVENT - CREW AND PASSENGERS SMELT SMOKE FOR APPROX. 15 SECONDS DURING DESCENT INTO OLF, SMELL CLEARED AND NO FURTHER EVIDENCE OF FIRE, SWEPT CABIN, CARGO, AND COCKPIT WITH NO EVIDENCE OF FIRE. MAINTENANCE INSPECTED ENVIRONMENTAL SYSTEM, FOUND NO EVIDENCE OF BURNING, THEN RAN ENVIRONMENTAL SYSTEM WITH CREW, SYSTEM CHECKS GOOD REF BMM 21-00-00.