As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COPILOT NOTED QUICK-DONNING CREW MASK HEAD HARNESS ORIENTED UPSIDE DOWN COMPARED TO PILOT'S O2 MASK WHEN TEST FITTED. MASK FUNCTIONS OK, AND HEAD HARNESS COULD BE RE-ORIENTED TO FIT, BUT CONNECTIONS WOULD FACE AWAY FROM MASK BODY INSTEAD OF TOWARDS MASK BODY. VERIFIED HEAD HARNESS INSTALLED TO REGULATOR/MASK BODY PORTION 180 DEGRESS DIFFERENT. MASK FROM LOT CODE 1229, MFG JULY, 2012. REPLACED OXYGEN MASK WITH NEW MASK. RECOMMEND OXYGEN MASK MFG INVESTIGATE QUALITY CONTROL PROCEDURES AND MODIFY OR CORRECT AS REQUIRED.