As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE, EXPERIENCED AN AUTO PRESSURIZATION FAILURE. PERFORMED AOM 1 PROCEDURE & SWITCH TO MANUAL MODE. MANUAL MODE REQUIRED EXCESSIVE MOVEMENT & WAS DIFFICULT TO CONTROL. PERFORMED AOM 1 PROCEDURE FOR MANUAL CONTROL FAILURE. PERFORMED GVI OF LINES AT BOTH OUTFLOW LINES & AT PCA FLAPPER. OPERATIONS CHECKED GOOD WITH NO EICAS OR CMC MSGS IN BOTH AUTO & MANUAL MODES IAW AMM 21-31-00.