As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS AUTO CABIN SYS PRESSURIZATION SYS 1 & 2 FAULT DURING DESCENT. AIR PACK 2 REGULATOR FAULT IN FLIGHT. MAINTENANCE TROUBLESHOT IAW TSM 21-31-00-810-828A, SYSTEM OPS CHECKS GOOD IAW AMM 21-31-00-710-002. MANUAL OPS CHECK TEST GOOD IAW AMM 21-31-00-710-003. SYSTEM CHECKS GOOD.