As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TOUCHDOWN, OXYGEN MASKS AT ROW 14 LEFT DEPLOYED. PERFORMED OPS CHECKL OF MANUAL MASK RELEASE AND IT FAILED. REPLACED THE OXYGEN BOX AND OPS CHECK FAILED AGAIN. R & R SR 14L OXYGEN CONTAINER BOX ASSY IAW AMM 35-21-41, PB401. OPS CHECKED OK IAW AMM 35-23-00-710-001A.