As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MCD PRESS DUMP DOOR CONNECTING ROD BROKEN. CREW DEPARTED AND COULD NOT PRESURIZE. NO INDICATIONS. THEY RETURNED TO DEPARTURE. (RESOLVED ON W/O: 221552 TASKCARD: NR-00001) MCD PRESS DUMP DOOR CONNECTING ROD REPLACED, RIGGED AND TESTED.