As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXCESS CABIN ALTITUDE, REPORTED THEY EXPERIENCED A CABIN DEPRESSURIZATION APPROXIMATELY 45 MILES AWAY FROM DESTINATION ON INITIAL DESCENT. THE CREW THEN DONNED O2 MASKS & FOLLOWED THE QRH & DECLARED AN EMER. LANDING WAS UNEVENTFUL. THE TOWER REPORTED THE CREW REQUESTED A LOWER ALTITUDE, ACFT WAS AT 3200 FEET & WAS ISSUED LOWER AT PILOT DISCRETION. REMOVED THE DIGITAL CONTROLLER, CLEANED CONNECTOR & PERFORMED OPERATIONS TEST IAW ATR 42 JIC 21-31-00 POT 10020.