As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN REPORTED THAT ON LEG FROM KPIR TO KDEN PASSENGERS IN THE REAR CABIN COULD SMELL WHAT WAS DESCRIBED AS "HOT PLASTIC" AND A UNUSUAL LOUD SOUND OF AIR MOVEMENT THIS WAS REPORTED TO THE CREW AFTER AN UNEVENTFUL LANDING IN KDEN (IT WAS NOTED THE LOUD SOUND WHEN AWAY WHEN PACK 2 WAS TURNED OFF). AIRCRAFT MAINTENANCE DISCOVERED A #2 ENGINE BLEED AIR TUBE HAD OPEN CRACKED. THIS SDR IS BEING SUBMITTED PER 14 CFR 121.703(C).