What was found
CREW REPORT: O2 MASK DEPLOYED 7ABC. CHECK O2 CANNISTER & PIN FOR SECURITY & ACTIVATION. RESTOW MASKS, CHECK LATCH AND CONTAINER FOR CONDITION, IF NO DEFECTS, TEST LATCH ACTIVATION WITH TOOL IN ACTIVATION HOLE TO CONFIRM LATCH RELEASES. SECURE DOOR CLOSED. MX FOUND THE LATCH MECHANISM BROKEN. TAPED DOOR CLOSED AND INOPED ROW 7ABC IAW MEL PLACARD 3521A. REPACKED MASK CORRECTLY. RESET LATCH, OP CHECK NORMAL.