As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: AT APPROX 7000' CABIN VSPEED 11-00-150 FPM. UNABLE TO CONTROL CABIN ALT SELECTED MAN CONTROL AND CONTINUED UNPRESSURIZED. ACCOMPLISHED TSM 21-31-00-810-A CABIN PRESSURE CONTROLLER #1 AND #2 BITE TEST OK, AIRCRAFT OK FOR SERVICE.