As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OBSERVER INTERCOM WILL NOT TRANSMIT USING HEADSET MIC.(<P>FOUND RESET TEST BUTTON STUCK ON OXYGEN MASK BOX. REMOVED AND REPLACED OBSERVER OXYGEN MASK BOX IAW AMM 35-11-51. PERFORMED HEADSET MIC OPS CHECK IAW AMM 23-51-00, OPS CHECK GOOD. NO DEFECTS NOTED AT THIS TIME. PART EFFECTIVE PER IPC 35-11-52-16.</P>)