As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) OPERATOR REPORTED PERSISTENT SERVICING REQUIREMENT OF THE OXYGEN SYSTEM. INVESTIGATION FOUND A PINHOLE LEAK IN THE SOLDER JOINT AT THE BULKHEAD ATTACH END OF THE LINE ASSY-PRESSURE BULKHEAD TO OXYGEN GAGE. PN 9912057-7 (ALT S1721-20).