As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
QRF. BLEED TRIPOFF LEFT SIDE. CABIN UNCONTROLABLE. CORRECTIVE ACTION. DISPATCH ACC MEL 36-08 CAT (C). THEN REMOVED MEL WITH THE FOLLOWING ACTION: HAS BEEN REPLACED PRECOOLER CONTROL VALVE IAWTASK 36-12-02-000-801 AND TASK 36-12-02-400-861. IN TEST NORMAL.