As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO MAINTENANCE BASE AND DECLARED EMERGENCY DESCENT, NOT ABLE TO MAINTAIN CABIN PRESSURIZATION. MASKS DID NOT DEPLOY. FOUND UPPER AND LOWER GATE SEALS BLOWN ON R-2 CABIN DOOR. REPAIRED DOOR SEALS AND PRESSURIZATION CHECKED GOOD.