B787 captain reported that after an equipment swap; they could not log onto controller pilot datalin...

Narrative:

I operated [flight out of] sfo. Approximately 80 minutes before departure we had an equipment swap and was issued another release. I accepted the new release and we downloaded the new optimized flight plan (ofp). We were unable to login into cpdlc for our clearance; thinking that is this modality was not working so late at night; we pivoted to voice communications to receive our clearance; SOP.just prior to being released to oceanic; ATC advised us that our current attempt to login to kzak on cpdlc was futile; as our registration was not matching what was on our filed flight plan. I called dispatch and informed them of the situation and they said they would handle the coordination on the aircraft change and flight plan.upon waking from my crew rest; both the relief officers (ros) informed me that center mentioned that our registration and flight plan were not aligned. I phoned dispatch once again to inform them of the situation. The new dispatcher was not very happy to receive this information.

Original NASA ASRS Text

Title: B787 Captain reported that after an equipment swap; they could not log onto Controller Pilot Datalink Communications (CPDLC) either for initial clearance or for enroute contact. They were informed by ATC twice that the aircraft registration did not match the filed flight plan.

Narrative: I operated [flight out of] SFO. Approximately 80 minutes before departure we had an equipment swap and was issued another release. I accepted the new release and we downloaded the new Optimized Flight Plan (OFP). We were unable to login into CPDLC for our clearance; thinking that is this modality was not working so late at night; we pivoted to voice communications to receive our clearance; SOP.Just prior to being released to Oceanic; ATC advised us that our current attempt to login to KZAK on CPDLC was futile; as our registration was not matching what was on our filed flight plan. I called Dispatch and informed them of the situation and they said they would handle the coordination on the aircraft change and flight plan.Upon waking from my crew rest; both the Relief Officers (ROs) informed me that Center mentioned that our registration and flight plan were not aligned. I phoned Dispatch once again to inform them of the situation. The new Dispatcher was not very happy to receive this information.

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.

Attributes
ACN	1394629
Time
Date	201610
Place
Locale Reference	SFO.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B787 Dreamliner Undifferentiated or Other Model
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 14726 Flight Crew Type 1375
Events
Anomaly	Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

B787 captain reported that after an equipment swap; they could not log onto controller pilot datalink communications (cpdlc) either for initial clearance or for enroute contact. They were informed by ATC twice that the aircraft registration did not match the filed flight plan.