As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRUISE FLIGHT, CLOSE TO FLIGHT DESTINATION, CREW SMELLED "STRANGE ODOR" IN CABIN/COCKPIT. PILOT TURNED OFF THE ENVIRONMENTAL CONTROL UNIT AND SMELL CEASED. INSPECTION OF ECU REVEALED THAT THE "INDUCTOR" PIPE TEMPERATURE CONTROLLER TO COOLING TURBINE HAD A SMALL SPLIT AT THE TURBINE AND PIECES OF THE SEALING O-RING (PACKING) WAS EXPOSED AND MISSING.