What was found
LOSS OF CABIN PRESSURE LEVEL AT FL290, CABIN PRESS REACHED FL220. UNCONTROLABLE IN MANUAL MODE. GOOD BLEED AIR PRESSURE DURING DEPRESSURIZATION. REMOVED AND REPLACED MAIN OUTFLOW VALVE AND CABIN PRESSURE CONTROLLER PER MM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LOSS OF CABIN PRESSURE LEVEL AT FL290, CABIN PRESS REACHED FL220. UNCONTROLABLE IN MANUAL MODE. GOOD BLEED AIR PRESSURE DURING DEPRESSURIZATION. REMOVED AND REPLACED MAIN OUTFLOW VALVE AND CABIN PRESSURE CONTROLLER PER MM.