As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 250 CABIN PRESS STARTED CLIMBING AT 100FT PER MIN PERFORMED COM 2.21.16 UNABLE TO STOP CLIMB. STARTED DESCENT, CABIN WOULD NOT HOLD PRESSURE UNTIL PASSING 17,000 FT CABIN ALT PEAKED AT 9,000 FT RETURNED TO CUN. REMOVED DEFECTIVE PACK SWITCH FOR RT PACK AND REPLACED WITH NEW SWITCH. OPS CHECK GOOD, MM 21-50-01.