As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA INFLT T766/27SEP. CREW REPORTED CABIN PRESSURE INDICATION AND PRESSURE CLIMB. PERFORMED EMERGENCY DESCENT AND CABIN PRESSURE STABILIZED. LANDED LGA WITHOUT INCIDENT. REPLACED BOTH CABIN PRESSURE CONTROLLERS AND THE OUT FLOW VALVE ACTUATOR. SYSTEM GROUND CHECKED NORMAL OPS.