What was found
LOST CABIN PRESSURE ON TAKEOFF. *S/D* COULD NOT CLOSE AFT OUTFLOW VALVE IN MANUAL AC OR DC. REPLACED CABIN PRESSURE SELECTOR PANEL AND CABIN PRESSURE CONTROLLER.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LOST CABIN PRESSURE ON TAKEOFF. *S/D* COULD NOT CLOSE AFT OUTFLOW VALVE IN MANUAL AC OR DC. REPLACED CABIN PRESSURE SELECTOR PANEL AND CABIN PRESSURE CONTROLLER.