As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE LP302815 ITEM 1 CAB PR SYS 1 & 2 FAULT AC WAS GROUNDED AS A RESULT OF SDR EVENT. PERFORMED TSM 21-31-00-810-823-A. REMOVED AND REPLACED CPC 1 (11H2) IAW AMM 21-31-34-000/400-001-A OPERATIONAL TEST OF THE PRESSURE CONTROL AND MONITORING GOOD. NO MORE FECTS NOTED A/C GOOD FOR SERVICE.