As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING MX WALK AROUND FOUND LT OXYGEN SYSTEM LEAKING. UPON INVESTIGATION FOUND TEE FITTING LOCATED AT LT FUSELAGE OXYGEN GAUGE CRACKED AT 2 POINTS. IT APPEARS THAT UPON ORIGINAL INSTALLATION OF FITTING IT WAS OVER TORQUED. FITTING REPLACED WITH NEW. LEAK CHECKS CARRIED OUT. SYSTEM FUNCTION CHECKED SERVICEABLE.