As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT NOT GROUNDED) CA AND OBSERVER OXYGEN MASKS MICROPHONE INOP. / DISCONNECTED AND RECONNECTED CONNECTOR PLUG ON CAPT'S O2 MASK STORAGE BOX AND CAPT'S OP CKS GOOD IAW AMM 23-51-00-710-004-A OCCUPANT MIC IS NOT CONNECTED PER AMM 23-51-00-710-004-A."