As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - EMERGENCY EQUIPMENT - DURING C-17 CHECK OF EMERGENCY OXYGEN SYSTEM THE PASSENGER SERVICE UNIT OXYGEN MASK AT SEAT ROW 19 LT FAILED DROP CHECK. MAINTENANCE FOUND OXYGEN MASK LANYARD AT SEAT ROW 19 LT MISROUTED, CORRECTLY ROUTED LANYARD, DROP TEST WAS GOOD PER AWA T/C S1C35002.