As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRUISE AT FL270 GOT ADVISORY FOR EXCESSIVE CABIN ALTITUDE. CABIN WAS AT 9200 FT CABIN PRESS PAGE POPPED UP AND SHOWED THE PACK 1 TRIANGLE AMBER. CABIN WAS SLOWLY RISING (REMEMBER PACK 2 TRIANGLE WAS AMBER AS WELL AS PACK 2 WAS MEL'D) A FEW MINUTES LATER WE GOT THE PACK 1 REGULATOR FAULT. AIR PACK 1 REGUL FAULT. THE LOSS OF PACK 1 CAUSED A LOSS OF PRESSURIZATION THAT RESULTED IN AN EXCESSIVE CAB ALT. SUPPLEMENT TO FOLLOW.