What was found
ON THE GND, FIRST OBSERVERS AUDIO PANEL HAD NO LIGHTS IN THE MIKE SELECTOR BUTTONS. REPLACED AUDIO PANEL & OPERATIONAL CHECKED NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ON THE GND, FIRST OBSERVERS AUDIO PANEL HAD NO LIGHTS IN THE MIKE SELECTOR BUTTONS. REPLACED AUDIO PANEL & OPERATIONAL CHECKED NORMAL.