As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CLIMBING THROUGH 14,000FT THE CREW NOTICED THE RATE OF CLIMB INDICATION DASHED FOLLOWED SHORTLY BY AN AURAL WARNING OF CABIN. THE CREW DONNED OXYGEN MASKS AND DESCENDED TO 10,000FT. THE AIRCRAFT THEN RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE VERIFIED THAT THE MANUAL PRESSURIZATION SYSTEM WAS OPERATING NORMALLY AND PLACED THE AUTO PRESSURIZATION SYSTEM ON MEL. THE MEL WAS CLEARED IN KSDF ON 6/4/2010 WITH THE REPLACEMENT OF THE DIGITAL PRESSURE CONTROLLER.