As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHEN TRYING TO SERVICE OXYGEN SYSTEM ONLY THE LT BOTTLE WOULD FILL AND A LOUD LEAK COULD BE HEARD. AFTER INVESTIGATION BY MAINTENANCE THE FILLER INTERCONNECT LINE WAS FOUND TO BE CRACKED WHERE IT ATTACHES TO THE RT BOTTLE. THE LINE WAS REPLACED AND LEAK TESTED SERVICABLE.