As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE O2 WORKS ON ALL 3 MASKS, MICROPHONE FOR ALL 3 MASKS ARE INOP. *S/D* AFTER FURTHER ANALYSIS, IT HAS BEEN DETERMINED THIS IS NOT AN SDR REPORTABLE EVENT. ALL FLT DECK MASKS OPS CK OK. NO EVIDENCE THAT THERE EVER WAS AN ISSUE WITH THE SYSTEM OF THE A/C.