As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOTS NOTICED A HIGHER THAN NORMAL COCKPIT AIR SUPPLY TEMP IN CRUISE. FURTHER INVESTIGATION AFTER THE FLIGHT FOUND THE COCKPIT ACM CLOSE TO BEING SEIZED AS WELL AS A NOTICEABLE AMOUNT OF BLACK DEBRIS IN THE OIL SUMP BOWL. THE ACM WAS R & R WITH A REPAIRED UNIT.