As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN OXYGEN MASK MIC INTERMITTENT WHEN USING INTERCOM SWITCH ON AUDIO PANEL AND GLARESHIELD MIC SWITCH.(<P>REPLACED CAPTAIN'S MASK WITH FIRST OBS MASK PER AMM 35-11-18. OPS CHECK AND LEAK CHECK GOOD. OBS SEAT & ASSOCIATED EQUIPMENT PLACED ON DMI 224831 PER MEL 25-11-02-01B CAT A. R/R O2 MASK STOWAGE BOX IAW AMM 35-11-18. OPS TEST GOOD. DMI 224831 CLOSED.</P>)