As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRESSURIZATION INOPERATIVE AT ALTITUDE, THE ACFT GOT RED "ALT" ANNUNCIATOR, EMER PRESSURIZATION DID NOT KICK ON. DIFFERENTIAL PRESSURE GAUGE STUCK AT 12,000 FT. REPLACED PRIMARY OUT FLOW VALVE. OPS CHECK STILL BAD ON CHECK FLIGHT. NOTED CABIN ALTITUDE UNCONTROLLABLE IN MANUAL MODE. TROUBLESHOOT DOWN TO AND REPLACED MANUAL TOGGLE VALVE. ACCOMPLISHED OPS CHECK AND ALL OPS NORMAL.