What was found
INSPECTION TYPE:N/A AIR TURNBACK - CABIN CLIMBING UNCONTROLLABLE WITH EITHER AUTO OR MANUAL PRESS TROLLER. DEFER CABIN PRESSURE CONTROL SYS AUTO/MAN MODES PER MEL 21-16-1-3.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
INSPECTION TYPE:N/A AIR TURNBACK - CABIN CLIMBING UNCONTROLLABLE WITH EITHER AUTO OR MANUAL PRESS TROLLER. DEFER CABIN PRESSURE CONTROL SYS AUTO/MAN MODES PER MEL 21-16-1-3.