What was found
INTERPHONE INAUDIBLE, WEAK, GARBLED BETWEEN ALL F/A POSITIONS AND CABIN TO COCKPIT AND COCKPIT TO CABIN P/A OK IN FLIGHT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
INTERPHONE INAUDIBLE, WEAK, GARBLED BETWEEN ALL F/A POSITIONS AND CABIN TO COCKPIT AND COCKPIT TO CABIN P/A OK IN FLIGHT.