As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OXYGEN PANEL OPENED IN FLIGHT. DEFER OXYGEN MODULE AT SEAT 12ABC TO MEL AND PLACARD IAW MEL 35-21-01A. M PROCEDURE C/W. FOUND OXYGEN PANEL LATCH NOT ENGAGED. CLOSED & LATCH 12A OXYGEN PANEL PROPERLY. OK FOR SVC. IAW AMM 35-21. M PROC REV. MEL PLAC REM. (LP: 8109940)