As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-17 CHECK THE FORWARD LAVATORY OXYGEN MASK DOOR CONTAINER TEST STOP BUTTON FAILED TEST. MAINTENANCE REMOVED AND REPLACED FORWARD LAVATORY OXYGEN MASK ASSEMBLIES IAW BMM TASK 35-22-31-004-059, AND TASK 35-22-31-404-051, OPERATIONAL CHECK WAS GOOD.