As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT HEARD A POP AND HISSING SOUND UN VICINITY OF CAPT O2 MASK. ALSO NOTED A DROP IN CREW O2 QUANTITY TO ZERO. POSSIBLE LEAK UNDER CAPT O2 COMPARTMENT. FOUND FLEX LINE BROKEN UNDER CAPTS O2 MASK BOX. REPLACED SAM REPLACED O2 BOTTLE REF MM. LK CKS GOOD.