As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OXYGEN BOTTLE WAS RECEIVED FROM VENDOR FULLY SERVICED AND WAS INSTALLED ON AIRCRAFT WITHOUT CONNECTING THE SUPPLY LINES. OXYGEN BOTTLE SITTING STATICALLY, THE MALE CONNECTION FITTING SEPARATED INTERNALLY CAUSING EXPLOSION LIKE SOUND AND DISSIPATING ALL OF THE OXYGEN. THE OXYGEN BOTTLE WAS REMOVED FROM AIRCRAFT AND RETURNED TO VENDOR.