As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
1 MASK MISSING LEFT FWD O2 CYLINDER. PORTABLE OXYGEN DISPENSING UNITS, BOTTLE AND MASK. FWD TO MDDR 141745 IAW DDG 35-31-01, CAT D. PLACARD INSTALLED. 04FEB21 - 1193407 - M6 -& MIA - INSTALLED MISSING MASK AT THE LT FWD O2 CYLINDER AS PER AMM 35-31-01. THIS CLEARS MDDR 141745.