As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN`S O2 MASK DOES NOT TEST PROPERLY. YELLOW CROSS STAYS DISPLAYED AND DOES NOT GO AWAY. R & R CAPT O2 MASK STORAGE BOX. BOX BAD FROM STOCK. R & R BAD BOX WITH NEW, OPS TEST LEAK TEST OK IAW AMM 35-12. (LP: 8821852, AIRCRAFT WAS GROUNDED)