As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE LP302817 ITEM 1-3, AC WAS GROUNDED AS A RESULT OF AN SDR EVENT. DURING CLIMB CPC 1 FAILED FOLLOWED BY CPC 2. UNABLE TO MANUALLY CONTROL OUTFLOW VALVE IN MANUAL MODE. DURING CPC FAILURE, SAFETY VALVE WENT FULLY OPEN. CABIN INDICATIONS SHOWED PSI FLUCTUATING BETWEEN 0-(-)4 ( NEGATIVE) SAFETY VALVE CLOSED ON SHORT FINAL APPROACH. REMOVED AND REPLACED OUTFLOW CALVE IN ACCORDANCE W AMM 21-31-51-000-001A. OPS TEST GOOD. AC RELEASED FOR OCF.