As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COMPONENT IN SHOP MAINTENANCE: MAINTENANCE PERFORMED THE FLAT FIRE OF THE DOOR SLIDE IN THE SHOP AND THE PRESSURE REGULATING VALVE DID NOT OPEN AT THE PROPER PRESSURE AND THE SLIDE RUPTRED. THIS SLIDE WAS REMOVED FROM THE L2 DOOR ON DURING A SCHEDULED REPLACEMENT. THE SLIDE ASSMBLY WAS SENT TO COLLINS AEROSPACE FOR REVIEW / REPAIR.