As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE CABIN EMERGENCY OXYGEN MASK DROP TEST, THE ROW 20 ABC CONTAINER ASSY OXYGEN SUPPLY TUBING WAS FOUND BROKEN-OFF FROM THE "FLOW INDICATOR" LOCATED IN-LINE WITH THE PASSENGER MASK. ITEM WAS PLACED ON MEL 35-21-41-04 AND THE UNIT REPLACED AT THE NEXT MX OPPORTUNITY.