As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO CLT DUE TO THE O2 MASKS DEPLOYED ROW 33ABC,36ABC,11DEF. THE AIRCRAFT LANDED SAFELY AT CLT WITHOUT FURTHER INCIDENT. MAINTENANCE REPACKED O2 MASKS PER AMM 35-21-43-550-801-A AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK OF MANUAL MASK RELEASE PER AMM 35-23-00-710-001-A.