As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT LT FA O2 MASK FAILED DROP FROM WU K5388C. OPENED DOOR, FOUND MASK ALL ARRAY BINDING DOOR TO STAY CLOSED. REPACKED MASK AND RETESTED 3 TIMES WITH PROPER DOOR ACTUATION TO OPEN PER MM. CK'D PACKING AND DROP CKD OK WITH INSPECTOR CHECKING OPERATION OF DOOR.