As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 8,000 FEET CABIN ALTITUDE INDICATED ZERO, CABIN RATE INDICATED ZERO. CABIN DIFFERENTIAL INDICATED 4.8 PSI. AIRCRAFT RATE OF CLIMB WAS GREATER THAN 2,500 FEET PER MINUTE.PERFORMED OPERATION TEST AND FUNTIONAL BITE TEST OF THE CABIN PRESSURE CONTROLLER IAW AMM. NO DEFECTS FOUND. CABIN PRESSURE CONTROLLER TEST SATISFACTORILY.