What was found
CAPTAIN'S O2 MASK RED PRESS TO TEST BUTTON MISSING SMALL PIECE OF BUTTON. MASK IS FULLY FUNCTIONAL. REPLACED CAPT O2 MASK ASSY, OPS CHECKED OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CAPTAIN'S O2 MASK RED PRESS TO TEST BUTTON MISSING SMALL PIECE OF BUTTON. MASK IS FULLY FUNCTIONAL. REPLACED CAPT O2 MASK ASSY, OPS CHECKED OK.