What was found
AIRCRAFT WOULD NOT PRESSURIZE IN FLIGHT. RETURNED TO PHX. PERFORMED SINGLE PACK TRANSFER PROCEDURE IN MEL APPENDIX O-1A. CHECKS GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WOULD NOT PRESSURIZE IN FLIGHT. RETURNED TO PHX. PERFORMED SINGLE PACK TRANSFER PROCEDURE IN MEL APPENDIX O-1A. CHECKS GOOD.