As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OXYGEN MASK MANUAL DROP TEST, THE AFT RIGHT FLIGHT ATTENDANT MASKS DROPPED & IT WAS NOTED THAT THE ACTIVATION LANYARD WAS MISSING & THAT THE MASK LANYARD RINGS WERE NOT ATTACHED TO THE OXYGEN GENERATOR FIRING PIN. IAW AMM 35-21-00 STEP 2E. INSTALLED ACTIVATION LANYARD & SECURED MASK RINGS IAW AMM 35-21-10.