As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT, UNABLE TO CONTROL THE CABIN PRESSURIZATION, NEITHER WITH AUTO OR MANUAL (WITH 4 T.C. ON). FOUND NR 2 TC DISFUSER SNAP RING LOOSE. REINSTALLED SNAP RING AT NR 2 TC IN ACCORDANCE WITH DC-8 M/M 21-10-6. PRESSURIZATION CHECK FOUND NORMAL IN ACCORDANCE WITH DC-8 M/M 21-31-0.