What was found
CLT FLT 1058 DURING EMERGENCY DESCENT, CREW REPORTED THE OXYGEN MASKS AT SEAT 1DF, 3DF AND AT THE AFT LEFT LAV FLIGHT ATTENDANT STATION DID NOT DEPLOY. MAINTENANCE, DROPPED OXYGEN MASK DOORS, THAT DID NOT DEPLOY, REPLACED ALL AFFECTED OXYGEN GENERATORS AND REPACKED OXYGEN MASKS IN PSU'S. OPERATIONALLY CHECKED OXYGEN MASKS AND DOORS PER MM 35-22-00. OPERATIONAL CHECK GOOD. AIRCRAFT OK FOR SERVICE.