As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 2500' LOST CABIN PRESSURIZATION. MAINT TEXT: CREW VERBAL WAS HE HAD IT IN CABIN AUTO 1, PACK WAS OPERATING NORMAL. PNEU PRESSURE WAS GOOD ON BOTH ENGINE. HE WAS AT 500' PER MINUTE WITH NO MESSAGE. ACCOMPLISHED TEST OF THE PRESSURIZATION CONTROL SYSTEM PER MM, CKS GOOD.