Narrative:

The aircraft cabin intercommunication data system (cids) system had multiple write-ups in the log history. The inbound crew also wrote up the cids panel for an illuminated red caution light.the contract mechanic ran several tests in consultation with maintenance. However; the caution light remained illuminated despite the associated lighting and communications equipment operating normally. A decision was made to defer the cids caution light as inoperative.approximately one hour into flight; we received an aural flight deck door alert indicating a flight attendant (flight attendant) was requesting access. There was a note under the door from our purser; informing us that the cabin interphone was inoperative. As cabin activity; including a deployed galley cart; appeared normal I elected to allow flight attendant entry to the flight deck.we learned that all cabin lighting; including signs; were cycling on and off. The cabin interphone and PA systems were inoperative; with clicking sounds coinciding with the lights cycling. We consulted the flight manual and contacted maintenance via dispatch.the maintenance controller; asked us to perform the system reset associated with the com cids panel frozen procedure. But the procedure had no effect on our malfunctions. Maintenance then informed us that no other reset was available to us and we ended our radio conversation.it appeared to me that our condition was very similar to the malfunctions described in the communication cids 1+2 fault procedure. However; we had not received the associated ECAM class 1 message. As I concluded that inoperative cabin interphone and PA systems posed an unacceptable threat to the safety of our flight; I elected to perform the system reset associated with the communication cids 1+2 fault procedure. The reset restored normal lighting and communications; and the remainder of our flight was uneventful.

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Original NASA ASRS Text

Title: A320 flight crew reported that the Cabin Intercommunication Data System (CIDS) had an illuminated red caution light.

Narrative: The aircraft Cabin Intercommunication Data System (CIDS) system had multiple write-ups in the Log History. The inbound crew also wrote up the CIDS panel for an illuminated red caution light.The contract mechanic ran several tests in consultation with Maintenance. However; the caution light remained illuminated despite the associated lighting and communications equipment operating normally. A decision was made to defer the CIDS caution light as inoperative.Approximately one hour into flight; we received an aural flight deck door alert indicating a Flight Attendant (FA) was requesting access. There was a note under the door from our Purser; informing us that the cabin interphone was inoperative. As cabin activity; including a deployed galley cart; appeared normal I elected to allow FA entry to the flight deck.We learned that all cabin lighting; including signs; were cycling on and off. The cabin interphone and PA systems were inoperative; with clicking sounds coinciding with the lights cycling. We consulted the Flight Manual and contacted Maintenance via Dispatch.The Maintenance Controller; asked us to perform the System Reset associated with the Com CIDS Panel Frozen procedure. But the procedure had no effect on our malfunctions. Maintenance then informed us that no other reset was available to us and we ended our radio conversation.It appeared to me that our condition was very similar to the malfunctions described in the COM CIDS 1+2 Fault procedure. However; we had not received the associated ECAM Class 1 message. As I concluded that inoperative cabin interphone and PA systems posed an unacceptable threat to the safety of our flight; I elected to perform the System Reset associated with the COM CIDS 1+2 Fault procedure. The reset restored normal lighting and communications; and the remainder of our flight was uneventful.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.