As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT - FLT 1132 - DURING CRUISE AT 33,000 FEET THE CABIN ALTITUDE WARNING ACTIVATED. THE FLIGHT CREW INITIATED AN EMERGENCY DESCENT AND GAINED CONTROL OF THE CABIN PRESSURE USING THE MANUAL CONTROL SYSTEM. THE CABIN OXYGEN MASKS DID NOT DEPLOY. MAINTENANCE REPLACED THE CABIN PRESSURE AMPLIFIER. (M)