What was found
CAPT COCKPIT OXYGEN PRESS TO TEST SWITCH INOP. SWAPPED BOX FROM 1ST OBS SEAT. REPLACED OBS O2 BOX, LEAK CHECKED GOOD. TESTED OKAY.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CAPT COCKPIT OXYGEN PRESS TO TEST SWITCH INOP. SWAPPED BOX FROM 1ST OBS SEAT. REPLACED OBS O2 BOX, LEAK CHECKED GOOD. TESTED OKAY.