As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - DURING OVERNIGHT CHECK, WHILE GAINING ACCESS TO CEILING MOUNTED LAVATORY OXYGEN MODULES DURING FCD ACCOMPLISHMENT, OXYGEN GENERATORS AT M-1 AND M-2 MID CABIN LAVATORIES WERE FOUND WITH WARNING FLAGS AND SAFETY PINS INSTALLED. REMOVED WARNING FLAGS AND SAFETY PINS AT M-1 AND M-2 LAVATORIES. ACCOMPLISHED OXYGEN MODULE DOOR TEST WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)