What was found
RETURN TO DEPARTURE DUE TO "LOST CABIN PRESSURIZATION AT FL 300 WHILE CLIMBING TO FL 390 AUTO AND MANUAL MODE INOP EMERGENCY DESCENT TO 10,000 FT SHUT CABIN AIR OFF".
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RETURN TO DEPARTURE DUE TO "LOST CABIN PRESSURIZATION AT FL 300 WHILE CLIMBING TO FL 390 AUTO AND MANUAL MODE INOP EMERGENCY DESCENT TO 10,000 FT SHUT CABIN AIR OFF".