What was found
RETURNED AFTER TAKEOFF. ACFT DEPRESSURIZED AS LIFTED AFT. UPON FURTHER INSPECTION FOUND GND VLV TO BE NOT FULLY CLOSED IAW MEL 21-6. CLOSED GND VLV & VERIFIED. PERFORMED PRESSURIZATION CHECK IAW 21-31-00. OPERATION CHECKED GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RETURNED AFTER TAKEOFF. ACFT DEPRESSURIZED AS LIFTED AFT. UPON FURTHER INSPECTION FOUND GND VLV TO BE NOT FULLY CLOSED IAW MEL 21-6. CLOSED GND VLV & VERIFIED. PERFORMED PRESSURIZATION CHECK IAW 21-31-00. OPERATION CHECKED GOOD.